Provided by: latexmk_4.41-1_all bug

NAME

       latexmk - generate LaTeX document

SYNOPSIS

       latexmk [options] [file ...]

DESCRIPTION

       Latexmk  completely  automates the process of compiling a LaTeX document.  Essentially, it
       is like a specialized relative of the general  make  utility,  but  one  which  determines
       dependencies  automatically and has some other very useful features.  In its basic mode of
       operation latexmk is given the name of the primary source file  for  a  document,  and  it
       issues  the appropriate sequence of commands to generate a .dvi, .ps, .pdf and/or hardcopy
       version of the document.

       By default latexmk will run the commands necessary to generate a .dvi file.

       Latexmk can also be set to run continuously with a suitable previewer.  In that  case  the
       latex  program  (or one of its relatives), etc, are rerun whenever one of the source files
       is modified, and the previewer automatically updates the on-screen view  of  the  compiled
       document.

       Latexmk  determines which are the source files by examining the log file.  (Optionally, it
       also examines the list of input and output files generated  by  the  -recorder  option  of
       modern  versions  of  latex (and pdflatex, xelatex, lualatex, etc).  See the documentation
       for the -recorder option of latexmk below.)  When latexmk is run, it  examines  properties
       of  the  source  files,  and  if any have been changed since the last document generation,
       latexmk will run the various LaTeX processing programs as necessary.   In  particular,  it
       will  repeat  the  run  of latex (or a related program)) often enough to resolve all cross
       references; depending on the macro packages used.  With some macro packages  and  document
       classes,  four,  or  even  more,  runs  may be needed. If necessary, latexmk will also run
       bibtex, biber, and/or makeindex.  In addition, latexmk can be configured to generate other
       necessary files.  For example, from an updated figure file it can automatically generate a
       file in encapsulated postscript or another suitable format for reading by LaTeX.

       Latexmk has two different previewing options.  In the simple -pv option, a dvi, postscript
       or  pdf previewer is automatically run after generating the dvi, postscript or pdf version
       of the document.  The type of file to view is selected according to configuration settings
       and command line options.

       The   second   previewing   option   is  the  powerful  -pvc  option  (mnemonic:  "preview
       continuously").  In this case, latexmk runs continuously,  regularly  monitoring  all  the
       source  files  to  see if any have changed.  Every time a change is detected, latexmk runs
       all the programs necessary to generate a new version of the document.   A  good  previewer
       (like  gv)  will  then  automatically update its display.  Thus the user can simply edit a
       file and, when the changes are written to disk, latexmk completely automates the cycle  of
       updating  the  .dvi  (and  possibly the .ps and .pdf) file, and refreshing the previewer's
       display.  It's not quite WYSIWYG, but usefully close.

       For other previewers, the user may have to manually make the previewer update its display,
       which  can  be  (some  versions  of  xdvi and gsview) as simple as forcing a redraw of its
       display.

       Latexmk has the ability to print a banner in gray diagonally across each page when  making
       the  postscript  file.   It  can  also,  if  needed,  call an external program to do other
       postprocessing on generated dvi and postscript files.  (See the options -dF and  -pF,  and
       the  documentation  for  the  $dvi_filter  and $ps_filter configuration variables.)  These
       capabilities are leftover from  older  versions  of  latexmk.   More  flexibility  can  be
       obtained  in  current versions, since the command strings for running latex, pdflatex, etc
       can now be configured to run multiple commands.  This  also  extends  the  possibility  of
       postprocessing generated files to pdf files.  files.

       Latexmk  is highly configurable, both from the command line and in configuration files, so
       that it can accommodate a wide variety of user needs and system  configurations.   Default
       values  are  set according to the operating system, so latexmk often works without special
       configuration on  MS-Windows,  cygwin,  Linux,  OS-X,  and  other  UNIX  systems  (notably
       Solaris).

       A very annoying complication handled very reliably by latexmk, is that LaTeX is a multiple
       pass system.  On each run, LaTeX reads in information generated on  a  previous  run,  for
       things  like cross referencing and indexing.  In the simplest cases, a second run of LaTeX
       suffices, and often the log file contains a message  about  the  need  for  another  pass.
       However,  there  is  a  wide  variety of add-on macro packages to LaTeX, with a variety of
       behaviors.  The result is to break simple-minded  determinations  of  how  many  runs  are
       needed  and  of  which  programs.   In  its  new version, latexmk has a highly general and
       efficient solution  to  these  issues.   The  solution  involves  retaining  between  runs
       information  on  the  source  files, and a symptom is that latexmk generates an extra file
       (with extension .fdb_latexmk, by default) that contains the source file information.

LATEXMK OPTIONS AND ARGUMENTS ON COMMAND LINE

       In general the command line to invoke latexmk has the form

            latexmk [options] [file]

       All options can be introduced by single or double "-" characters, e.g., "latexmk -help" or
       "latexmk --help".

       Note  1:  In  addition to the options in the list below, latexmk recognizes almost all the
       options recognized by the latex, pdflatex programs (and their relatives) in their  current
       TeXLive  and  MiKTeX implementations.  Some of the options for these programs also trigger
       special action or behavior by latexmk, in which case they have  specific  explanations  in
       this  document.   Otherwise,  they  are  just passed through to a called latex or pdflatex
       program. Run latexmk with the -showextraoptions to get a list of the options that  latexmk
       accepts  and  that  are  simply  passed  through to latex or pdflatex (etc).  See also the
       explanation of the -showextraoptions option for more information.

       Note 2: In this documentation, the program  pdflatex  is  often  referred  to.   Users  of
       programs  like  lualatex  and xelatex should know that from latexmk's point of view, these
       other programs behave like pdflatex, i.e., they make a pdf file from a tex file, etc.   So
       whenever pdflatex is mentioned without mention of the other programs, the statements apply
       equally to lualatex, xelatex, and any other  similar  programs.   Latexmk  can  be  easily
       configured  to  use  whichever of these programs is needed.  See the documentation for the
       following  options:  -pdflatex="COMMAND",  -lualatex,  and  -xelatex,  and  also  see  the
       documentation  for  the  $pdflatex  configuration  variable.  At present latexmk cannot do
       automatic detection of which program is to be used.

       Definitions of options and arguments

       file   One or more files can be specified.  If no files are specified,  latexmk  will,  by
              default, run on all files in the current working directory with a ".tex" extension.
              This behavior can be changed: see the  description  concerning  the  @default_files
              variable  in  the section "List of configuration variables usable in initialization
              files".

       If a file is specified without an extension, then the ".tex"  extension  is  automatically
       added, just as LaTeX does.  Thus, if you specify:

            latexmk foo

       then latexmk will operate on the file "foo.tex".

       -auxdir=FOO or -aux-directory=FOO

              Sets the directory for auxiliary output files of (pdf)latex (.aux, .log etc).  This
              achieves its effect by the -aux-directory option of (pdf)latex, which currently  is
              only implemented on the MiKTeX version of (pdf)latex.

              See  also  the  -outdir/-output-directory  options, and the $aux_dir, $out_dir, and
              $search_path_separator configuration variables of latexmk.  In particular, see  the
              documentation  of  $out_dir  for  some  complications  on  what directory names are
              suitable.

       -bibtex
              When the source file uses bbl files for bibliography, run bibtex or biber as needed
              to regenerate the bbl files.

              This  property can also be configured by setting the $bibtex_use variable to 2 in a
              configuration file

       -bibtex-
              Never run bibtex or biber.

              A common use for this option is when a document  comes  from  an  external  source,
              complete  with  its  bbl  file(s), and the user does not have the corresponding bib
              files available.  In this situation use of the -bibtex- option will prevent latexmk
              from  trying  to  run bibtex or biber, which would result in overwriting of the bbl
              files.

       -bibtex-cond
              When the source file uses bbl file(s) for the bibliography, run bibtex or biber  as
              needed  to  regenerate  the  bbl files, but only if the relevant bib file(s) exist.
              Thus when the bib files are not available, bibtex or  biber  is  not  run,  thereby
              avoiding overwriting of the bbl file(s).  This is the default setting.

              (Note  that  it is possible for latexmk to decide that the bib file does not exist,
              even though the bib file does exist and bibtex or biber finds it.  The  problem  is
              that  the bib file may not be in the current directory but in some search path; the
              places latexmk and bibtex or biber cause to be searched need not be identical.   On
              modern  installations  of  TeX  and related programs this problem should not arise,
              since latexmk uses the kpsewhich program to do the search, and kpsewhich should use
              the  same search path as bibtex and biber.  If this problem arises, use the -bibtex
              option when invoking latexmk.)

       -bm <message>
              A banner message to print diagonally across each page when converting the dvi  file
              to  postscript.   The  message  must be a single argument on the command line so be
              careful with quoting spaces and such.

              Note that if the -bm option is specified, the -ps option is assumed.

       -bi <intensity>
              How dark to print the banner message.  A decimal number between  0  and  1.   0  is
              black and 1 is white.  The default is 0.95, which is OK unless your toner cartridge
              is getting low.

       -bs <scale>
              A decimal number that specifies how large  the  banner  message  will  be  printed.
              Experimentation  is necessary to get the right scale for your message, as a rule of
              thumb the scale should be about equal to 1100 divided by the number  of  characters
              in the message.  The default is 220.0 which is just right for 5 character messages.

       -commands
              List the commands used by latexmk for processing files, and then exit.

       -c     Clean  up  (remove)  all regeneratable files generated by latex and bibtex or biber
              except dvi, postscript and pdf.  These files are a combination of  log  files,  aux
              files,  latexmk's  database  file  of  source  file  information,  and  those  with
              extensions specified in the @generated_exts configuration variable.   In  addition,
              files specified by the $clean_ext configuration variable are removed.

              This  cleanup is instead of a regular make.  See the -gg option if you want to do a
              cleanup then a make.

              If $bibtex_use is set to 0 or 1, bbl files are counted as non-regeneratable.

              If  $cleanup_includes_cusdep_generated  is   nonzero,   regeneratable   files   are
              considered  as  including  those  generated  by  custom  dependencies  and are also
              deleted.  Otherwise these files are not deleted.

       -C     Clean up (remove) all regeneratable files generated by latex and bibtex  or  biber.
              This  is  the  same  as  the -c option with the addition of dvi, postscript and pdf
              files, and those specified in the $clean_full_ext configuration variable.

              This cleanup is instead of a regular make.  See the -gg option if you want to do  a
              cleanup than a make.

              If $bibtex_use is set to 0 or 1, bbl files are counted as non-regeneratable.

              If   $cleanup_includes_cusdep_generated   is   nonzero,   regeneratable  files  are
              considered as including  those  generated  by  custom  dependencies  and  are  also
              deleted.  Otherwise these files are not deleted.

       -CA    (Obsolete).  Now equivalent to the -C option.  See that option for details.

       -cd    Change to the directory containing the main source file before processing it.  Then
              all the generated files (aux, log, dvi, pdf, etc) will be relative  to  the  source
              file.

              This option is particularly useful when latexmk is invoked from a GUI configured to
              invoke latexmk with a full pathname for the source file.

       -cd-   Do NOT change to the directory containing the main source  file  before  processing
              it.  Then all the generated files (aux, log, dvi, pdf, etc) will be relative to the
              current directory rather than the source file.

              This is the default behavior and corresponds to  the  behavior  of  the  latex  and
              pdflatex  programs.   However, it is not desirable behavior when latexmk is invoked
              by a GUI configured to invoke latexmk with a full pathname  for  the  source  file.
              See the -cd option.

       -CF    Remove  the  file  containing the database of source file information, before doing
              the other actions requested.

       -d     Set draft mode.  This prints the banner  message  "DRAFT"  across  your  page  when
              converting the dvi file to postscript.  Size and intensity can be modified with the
              -bs and -bi options.  The -bm option will override this option as  this  is  really
              just a short way of specifying:

                   latexmk -bm DRAFT

              Note that if the -d option is specified, the -ps option is assumed.

       -deps  Show  a  list  of  dependent  files  after  processing.   This  is in the form of a
              dependency list of the form used by the make program, and it is therefore  suitable
              for  use  in  a  Makefile.   It  gives an overall view of the files without listing
              intermediate files, as well as latexmk can determine them.

              By default the list of dependent files is sent to stdout  (i.e.,  normally  to  the
              screen  unless  you've  redirected  latexmk's output). But you can set the filename
              where the list is sent by the -deps-out= option.

              See the section "USING latexmk WITH make" for an example of how to use a dependency
              list with make.

              Users  familiar  with  GNU automake and gcc will find that the -deps option is very
              similar in its purpose and results to the -M option to gcc.  (In fact, latexmk also
              has options -M, -MF, and -MP options that behave like those of gcc.)

       -dependents
              Equivalent to -deps.

       -deps- Do not show a list of dependent files after processing.  (This is the default.)

       -dependents-
              Equivalent to -deps-.

       -deps-out=FILENAME
              Set  the filename to which the list of dependent files is written.  If the FILENAME
              argument is omitted or set to "-", then the output is sent to stdout.

              Use of this option also turns on the output of the list of  dependent  files  after
              processing.

       -dF    Dvi  file filtering.  The argument to this option is a filter which will generate a
              filtered  dvi  file  with  the  extension  ".dviF".   All  extra  processing  (e.g.
              conversion  to  postscript,  preview,  printing)  will  then  be  performed on this
              filtered dvi file.

              Example usage: To use dviselect to select only the even pages of the dvi file:

                   latexmk -dF "dviselect even" foo.tex

       -diagnostics
              Print detailed diagnostics during a run.  This may help for debugging  problems  or
              to understand latexmk's behavior in difficult situations.

       -dvi   Generate dvi version of document.

       -dvi-  Turn  off generation of dvi version of document.  (This may get overridden, if some
              other file is made (e.g., a .ps file) that is generated from the dvi file, or if no
              generated file at all is requested.)

       -e <code>
              Execute the specified initialization code before processing.  The code is Perl code
              of the same form as is used in latexmk's initialization files -- for more  details,
              see    the    information    on    the   -r   option,   and   the   section   about
              "Configuration/initialization (RC) files".  The code is  typically  a  sequence  of
              assignment statements separated by semicolons.

              The  code is executed when the -e option is encountered during latexmk's parsing of
              its command line.  See the -r option for a way  of  executing  initialization  code
              from  a  file.  An error results in latexmk stopping.  Multiple instances of the -r
              and -e options can be used, and they are executed in the order they appear  on  the
              command line.

              Some  care  is needed to deal with proper quoting of special characters in the code
              on the command line.  For example, suppose you want to set the latex command to use
              its -shell-escape option, then under UNIX/LINUX you could use the line

                   latexmk -e '$latex=q/latex %O -shell-escape %S/' file.tex

              Note  that  the  single quotes block normal UNIX/LINUX command shells from treating
              the characters inside  the  quotes  as  special.   (In  this  example,  the  q/.../
              construct  is  a  Perl  idiom  equivalent  to using single quotes.  This avoids the
              complications of getting a quote character inside an already quoted string in a way
              that is independent of both the shell and the operating-system.)

              The  above  command line will NOT work under MS-Windows with cmd.exe or command.com
              or 4nt.exe.  For MS-Windows with these command shells you could use

                   latexmk -e "$latex=q/latex %O -shell-escape %S/" file.tex

              or

                   latexmk -e "$latex='latex %O -shell-escape %S'" file.tex

              The last two examples will NOT work with UNIX/LINUX command shells.

       -f     Force latexmk to continue  document  processing  despite  errors.   Normally,  when
              latexmk  detects that LaTeX or another program has found an error which will not be
              resolved by further processing, no further processing is carried out.

              Note: "Further processing" means the running of other programs or the rerunning  of
              latex  (etc)  that  would  be  done  if  no  errors  had  occurred.  If instead, or
              additionally, you want the latex (etc) program not to pause for user input after an
              error, you should arrange this by an option that is passed to the program, e.g., by
              latexmk's option -interaction=nonstopmode.

       -f-    Turn off the forced processing-past-errors such as is set by the -f  option.   This
              could be used to override a setting in a configuration file.

       -g     Force  latexmk to process document fully, even under situations where latexmk would
              normally decide that no changes  in  the  source  files  have  occurred  since  the
              previous  run.   This option is useful, for example, if you change some options and
              wish to reprocess the files.

       -g-    Turn off -g.

       -gg    "Super go mode" or "clean make": clean out generated files as if -C had been given,
              and then do a regular make.

       -h, -help
              Print help information.

       -jobname=STRING
              Set the basename of output files(s) to STRING, instead of the default, which is the
              basename of the specified TeX file.

              This is like the same option for current implementations of  the  latex,  pdflatex,
              etc,  and  the  passing  of  this  option  to  these  programs is part of latexmk's
              implementation of -jobname.

       -l     Run in landscape mode, using the landscape mode for the previewers and the  dvi  to
              postscript  converters.  This option is not normally needed nowadays, since current
              previewers normally determine this information automatically.

       -l-    Turn off -l.

       -latex="COMMAND"
              This sets the string specifying the command to run latex, and is typically used  to
              add  desired  options.   Since  the  string  normally contains spaces, it should be
              quoted, e.g.,

                   latexmk -latex="latex --shell-escape %O %S"  foo.tex

              The specification of the contents of the string are the  same  as  for  the  $latex
              configuration  variable.   Depending  on your operating system and the command-line
              shell you are using, you may need to change the single quotes to double quotes  (or
              something else).

              To set the command for running pdflatex (rather than the command for latex) see the
              -pdflatex option.

              Note that the effect of this option can also be achieved by  using  the  -e  option
              with  a suitable line of Perl code to set the $latex variable.  See the explanation
              of the -e option.

       -lualatex
              Use lualatex.  That is, use lualatex to process the source file(s) to pdf (in place
              of  pdflatex).   This  option  is  exactly  equivalent  to specifying the following
              sequence of options:


                   -pdflatex="lualatex %O %S" -pdf -dvi- -ps-
       -M     Show list of dependent files after processing.  This is  equivalent  to  the  -deps
              option.

       -MF file
              If a list of dependents is made, the -MF specifies the file to write it to.

       -MP    If  a  list  of dependents is made, includes phony target for each source file.  If
              you use the dependents list in a Makefile, the dummy rules work around errors  make
              gives if you remove header files without updating the Makefile to match.

       -new-viewer
              When  in  continuous-preview  mode, always start a new viewer to view the generated
              file.  By default, latexmk will, in continuous-preview mode, test for a  previously
              running previewer for the same file and not start a new one if a previous previewer
              is running.  However, its test sometimes fails (notably if  there  is  an  already-
              running  previewer that is viewing a file of the same name as the current file, but
              in a different directory).  This option turns off the default behavior.

       -new-viewer-
              The inverse of the -new-viewer option.  It puts latexmk in its normal behavior that
              in preview-continuous mode it checks for an already-running previewer.

       -nobibtex
              Never run bibtex or biber.

              A  common  use  for  this  option is when a document comes from an external source,
              complete with its bbl file(s), and the user does not  have  the  corresponding  bib
              files  available.   In  this  situation  use  of  the -nobibtex option will prevent
              latexmk from trying to run bibtex or biber, which would result  in  overwriting  of
              the bbl files.

       -norc  Turn off the automatic reading of initialization (rc) files.

              N.B.  Normally  the initialization files are read and obeyed, and then command line
              options are obeyed in the order they are encountered.  But -norc is an exception to
              this rule: it is acted on first, no matter where it occurs on the command line.

       -outdir=FOO or -output-directory=FOO

              Sets the directory for the output files of (pdf)latex.  This achieves its effect by
              the -output-directory option of (pdf)latex, which currently (Dec. 2011  and  later)
              is  implemented on the common versions of (pdf)latex, i.e., MiKTeX and TeXLive.  It
              may not be present in other versions.

              See also the  -auxdir/-aux-directory  options,  and  the  $aux_dir,  $out_dir,  and
              $search_path_separator  configuration variables of latexmk.  In particular, see the
              documentation of $out_dir for  some  complications  on  what  directory  names  are
              suitable.

       -p     Print out the document.  By default the file to be printed is the first in the list
              postscript, pdf, dvi that is being made.  But you can use the -print=... option  to
              change  the  type  of  file to be printed, and you can configure this in a start up
              file (by setting the $print_type variable).

              However, printing is enabled by default only under UNIX/LINUX  systems,  where  the
              default  is  to  use the lpr command and only on postscript files.  In general, the
              correct behavior for printing very much depends  on  your  system's  software.   In
              particular,  under  MS-Windows you must have suitable program(s) available, and you
              must have configured the print commands used by latexmk.  This can be  non-trivial.
              See  the  documentation on the $lpr, $lpr_dvi, and $lpr_pdf configuration variables
              to see how to set the commands for printing.

              This option is incompatible with the -pv and -pvc options, so it turns them off.

       -pdf   Generate pdf version of document using pdflatex.  (If you wish to use  lualatex  or
              xelatex,  you  can use whichever of the options -lualatex or -xelatex applies.)  To
              configure  latexmk  to  have  such  behavior  by  default,  see  the   section   on
              "Configuration/initialization (rc) files".

       -pdfdvi
              Generate pdf version of document from the dvi file, by default using dvipdf.

       -pdfps Generate pdf version of document from the ps file, by default using ps2pdf.

       -pdf-  Turn  off  generation  of pdf version of document.  (This can be used to override a
              setting in a configuration file.  It  may  get  overridden  if  some  other  option
              requires the generation of a pdf file.)

       -pdflatex="COMMAND"
              This  sets the string specifying the command to run pdflatex, and is typically used
              to add desired options.  Since the string normally contains spaces,  it  should  be
              quoted, e.g.,

                   latexmk -pdf -pdflatex="pdflatex --shell-escape %O %S"  foo.tex

              The  specification  of the contents of the string are the same as for the $pdflatex
              configuration variable.  Depending on your operating system  and  the  command-line
              shell  you are using, you may need to change the single quotes to double quotes (or
              something else).

              This option can also be used to set a program to be used instead  of  the  standard
              pdflatex program, e.g.,

                   latexmk -pdf -pdflatex="lualatex %O %S"  foo.tex

              to use lualatex or

                   latexmk -pdf -pdflatex="xelatex %O %S"  foo.tex

              to use xelatex.

              To set the command for running latex (rather than the command for pdflatex) see the
              -latex option.

              Note that the effect of this option can also be achieved by  using  the  -e  option
              with  a  suitable  line  of  Perl  code  to  set  the  $pdflatex  variable. See the
              explanation of the -e option.

       -print=dvi, -print=ps, -print=pdf, -print=auto,
              Define which kind of file is printed.  This option also ensures that the  requisite
              file is made, and turns on printing.

              The (default) case -print=auto determines the kind of print file automatically from
              the set of files that is being made.  The first in the list  postscript,  pdf,  dvi
              that is among the files to be made is the one used for print out.

       -ps    Generate postscript version of document.

       -ps-   Turn  off  generation  of  postscript  version  of  document.   This can be used to
              override a setting in a configuration file.  (It may get overridden by  some  other
              option that requires a postscript file, for example a request for printing.)

       -pF    Postscript  file  filtering.   The  argument  to this option is a filter which will
              generate  a  filtered  postscript  file  with  the  extension  ".psF".   All  extra
              processing  (e.g.  preview,  printing)  will  then  be  performed  on this filtered
              postscript file.

              Example of usage: Use psnup to print two pages on the one page:

                   latexmk -ps -pF 'psnup -2' foo.tex

              or

                   latexmk -ps -pF "psnup -2" foo.tex

              Whether to use single or double quotes round the "psnup -2"  will  depend  on  your
              command  interpreter,  as  used by the particular version of perl and the operating
              system on your computer.

       -pv    Run file previewer.  If the -view option is used, this will select the kind of file
              to be previewed (dvi, ps or pdf).  Otherwise the viewer views the "highest" kind of
              file selected, by the -dvi, -ps, -pdf, -pdfps options, in the order  dvi,  ps,  pdf
              (low  to high).  If no file type has been selected, the dvi previewer will be used.
              This option is incompatible with the -p and -pvc options, so it turns them off.

       -pv-   Turn off -pv.

       -pvc   Run a file previewer and continually  update  the  .dvi,  .ps,  and/or  .pdf  files
              whenever  changes  are  made to source files (see the Description above).  Which of
              these files is generated and which is viewed is governed by the other options,  and
              is  the  same  as  for the -pv option.  The preview-continuous option -pvc can only
              work with one file.  So in this case you will normally only specify one filename on
              the command line.  It is also incompatible with the -p and -pv options, so it turns
              these options off.

              The -pvc option also turns off force mode (-f), as is normally best for  continuous
              preview mode.  If you really want force mode, use the options in the order -pvc -f.

              With  a  good previewer the display will be automatically updated.  (Under some but
              not all versions of UNIX/Linux "gv -watch" does this for postscript files; this can
              be  set by a configuration variable.  This would also work for pdf files except for
              an apparent bug in gv that causes an error when  the  newly  updated  pdf  file  is
              read.)  Many other previewers will need a manual update.

              Important note: the acroread program on MS-Windows locks the pdf file, and prevents
              new versions being written, so it is a bad idea to use acroread to view  pdf  files
              in preview-continuous mode.  It is better to use a different viewer: SumatraPDF and
              gsview are good possibilities.

              There are some other methods for arranging  an  update,  notably  useful  for  many
              versions  of  xdvi  and  xpdf.   These are best set in latexmk's configuration; see
              below.

              Note that if latexmk dies or is stopped by the user, the  "forked"  previewer  will
              continue  to  run.   Successive  invocations with the -pvc option will not fork new
              previewers, but latexmk will normally use the existing previewer.  (At  least  this
              will happen when latexmk is running under an operating system where it knows how to
              determine whether an existing previewer is running.)

       -pvc-  Turn off -pvc.

       -quiet Same as -silent

       -r <rcfile>
              Read the specified initialization file ("RC file") before processing.

              Be careful about the ordering: (1) Standard initialization files -- see the section
              below on "Configuration/initialization (RC) files" -- are read first.  (2) Then the
              options on the command line are acted on in the order they are given.  Therefore if
              an initialization file is specified by the -r option, it is read during this second
              step.  Thus an initialization file specified with the -r option can  override  both
              the  standard  initialization  files  and previously specified options.  But all of
              these can be overridden by later options.

              The contents of the RC file just comprise a piece of code in the  Perl  programming
              language  (typically  a  sequence of assignment statements); they are executed when
              the -r option is encountered during latexmk's parsing of its command line.  See the
              -e  option  for  a  way of giving initialization code directly on latexmk's command
              line.  An error results in latexmk stopping.  Multiple instances of the -r  and  -e
              options  can be used, and they are executed in the order they appear on the command
              line.

       -recorder
              Use the -recorder option with latex and pdflatex.  In  (most)  modern  versions  of
              these  programs,  this results in a file of extension .fls containing a list of the
              files that these programs have read and written.  Latexmk will then use  this  file
              to  improve  its detection of source files and generated files after a run of latex
              or pdflatex.

              For further information, see the  documentation  for  the  $recorder  configuration
              variable.

       -recorder-
              Do not use the -recorder option with latex and pdflatex.

       -rules Show a list of latemk's rules and dependencies after processing.

       -rules-
              Do  not show a list of latexmk's rules and dependencies after processing.  (This is
              the default.)

       -showextraoptions
              Show the list of extra latex and pdflatex options that latexmk  recognizes.   These
              are  options  for the latex and pdflatex that latexmk recognizes, but simply passes
              through to these programs when they are  run.   These  options  are  (currently)  a
              combination  of  those  allowed  by  the TeXLive and MiKTeX implementations.  (If a
              particular option is given  to  latexmk  but  is  not  handled  by  the  particular
              implementation  of latex or pdflatex that is being used, that program will probably
              give an error message.)  These options are very numerous, but  are  not  listed  in
              this documentation because they have no effect on latexmk's actions.

              There  are  a  few  options (-includedirectory=dir, -initialize, -ini) that are not
              recognized, either because they don't fit with latexmk's  intended  operations,  or
              because  they  need special processing by latexmk that isn't implemented (at least,
              not yet).

              There are also options that are accepted by latex etc, but instead trigger  actions
              by latexmk: -help, -version.

              Finally,  there  are  certain options for latex and pdflatex (e.g., -recorder) that
              trigger special actions or behavior by latexmk itself as well as  being  passed  in
              some  form  to the called latex and pdflatex program, or that affect other programs
              as well.  These options do have entries in this documentation.  These options  are:
              -jobname=STRING, -aux-directory=dir, -output-directory=DIR, -quiet, and -recorder.

       -logfilewarninglist
              -logfilewarnings After a run of (pdf)latex, give a list of warnings about undefined
              citations and references (unless silent mode is on).

              See also the $silence_logfile_warnings configuration variable.

       -logfilewarninglist-
              -logfilewarnings- After a run of (pdf)latex, do not give a list of  warnings  about
              undefined citations and references.  (Default)

              See also the $silence_logfile_warnings configuration variable.

       -silent
              Run  commands  silently,  i.e.,  with options that reduce the amount of diagnostics
              generated.   For  example,  with  the  default   settings,   the   command   "latex
              -interaction=batchmode" is used for latex.

              See also the -logfilewarninglist and -logfilewarninglist- options.

              Also reduce the number of informational messages that latexmk generates.

              To change the options used to make the commands run silently, you need to configure
              latexmk with changed values of its configuration variables, the relevant ones being
              $bibtex_silent_switch,         $biber_silent_switch,         $dvipdf_silent_switch,
              $dvips_silent_switch,    $latex_silent_switch,    $makeindex_silent_switch,     and
              $pdflatex_silent_switch.

       -use-make
              When  after  a  run  of  latex  or pdflatex, there are warnings about missing files
              (e.g., as requested by the LaTeX \input, \include,  and  \includgraphics),  latexmk
              tries to make them by a custom dependency. If no relevant custom dependency with an
              appropriate source file is found, and if the -use-make option is set, then  latexmk
              will try as a resort using the make program to try to make the missing files.

              Note   that   the  filename  may  be  specified  without  an  extension,  e.g.,  by
              \includegraphics{drawing} in a LaTeX file.  In that case, latexmk will  try  making
              drawing.ext  with  ext set in turn to the possible extensions that are relevant for
              latex (or as appropriate pdflatex).

              See  also  the  documentation  for  the  $use_make_for_missing_files  configuration
              variable.

       -use-make-
              Do not use the make program to try to make missing files.  (Default.)

       -v, -version
              Print version number of latexmk.

       -verbose
              Opposite of -silent.  This is the default setting.

       -view=default, -view=dvi, -view=ps, -view=pdf
              Set  the  kind  of file used when previewing is requested (e.g., by the -pv or -pvc
              switches).  The default is to view the "highest" kind of  requested  file  (in  the
              order dvi, ps, pdf).

       -xelatex
              Use  xelatex.   That is, use xelatex to process the source file(s) to pdf (in place
              of pdflatex).  This option  is  exactly  equivalent  to  specifying  the  following
              sequence of options:


                   -pdflatex="xelatex %O %S" -pdf -dvi- -ps-
       Compatibility between options

       The  preview-continuous option -pvc can only work with one file.  So in this case you will
       normally only specify one filename on the command line.

       Options -p, -pv and -pvc are mutually exclusive.  So  each  of  these  options  turns  the
       others off.

EXAMPLES

       % latexmk thesis    # run latex enough times to resolve
                           cross-references

       % latexmk -pvc -ps thesis# run latex enough times to resolve
                           cross-references, make a postscript
                           file, start a previewer.  Then
                           watch for changes in the source
                           file thesis.tex and any files it
                           uses.  After any changes rerun latex
                           the appropriate number of times and
                           remake the postscript file.  If latex
                           encounters an error, latexmk will
                           keep running, watching for
                           source file changes.

       % latexmk -c        # remove .aux, .log, .bbl, .blg, .dvi,
                           .pdf, .ps & .bbl files

HOW TO CHANGE THE WAY LATEXMK BEHAVES, DEALING WITH PROBLEMS, ETC

       Some possibilities:

       a.  If  you get a strange error, do look carefully at the output that is on the screen and
       in log files.  While there is much that is notoriously verbose in the output of latex (and
       that  is  added to by latexmk), the verbosity is there for a reason: to enable the user to
       diagnose problems.  Latexmk does repeat some messages at the end of a run that  it  thinks
       would otherwise be easy to miss in the middle of other output.

       b. If latexmk doesn't do things the way you would like, the first step in finding out what
       to do is to look in this documentation at the list of command line options and then at the
       sections   on   configuration/initialization  files.   A  lot  of  latexmk's  behavior  is
       configurable to deal with particular situations.  (But there is a lot of reading.)

       c. Further tricks can involve replacing  the  standard  commands  that  latexmk  by  other
       commands or scripts.

       d.  For possible examples of code for use in an RC file, see the directory example_rcfiles
       in    the    distribution    of     latexmk     (e.g.,     at     http://www.ctan.org/tex-
       archive/support/latexmk/example_rcfiles).   Even if these examples don't do what you want,
       they may provide suitable inspiration.

       e. There's a useful trick that can be used when you are lualatex instead of pdflatex  (and
       in  some  related situations).  The problem is that latexmk won't notice a dependency on a
       file, bar.baz say, that is input by the lua code in your document instead of by the  LaTeX
       part.   (Thus  if  you  change bar.baz and rerun latexmk, then latexmk will think no files
       have changed and not rerun lualatex, whereas if you had  '\input{bar.baz}'  in  the  LaTeX
       part  of  the document, latexmk would notice the change.)  One solution is just to put the
       following somewhere in the LaTeX part of the document:

                     \typeout{(bar.baz)}

       This puts a line in the log file that latexmk will treat as implying that the file bar.baz
       was read.  (At present I don't know a way of doing this automatically.)  Of course, if the
       file has a different name, change bar.baz to the name of your file.

       f.           Look           on           tex.stackexchange,            i.e.,            at
       http://tex.stackexchange.com/questions/tagged/latexmk   Someone  may  have  already solved
       your problem.

       g. Ask a question at tex.stackexchange.com.

       h. Or ask me (the author of latexmk).  My e-mail is at the end of this documentation.

CONFIGURATION/INITIALIZATION (RC) FILES

       Latexmk can be customized using initialization files, which are read  at  startup  in  the
       following order:

       1) The system RC file, if it exists.
          On  a UNIX system, latexmk searches for following places for its system RC file, in the
       following order, and reads the first it finds:
          "/opt/local/share/latexmk/LatexMk",
          "/usr/local/share/latexmk/LatexMk",
          "/usr/local/lib/latexmk/LatexMk".
          On a MS-WINDOWS system it looks for "C:\latexmk\LatexMk".
          On a cygwin system (i.e., a MS-Windows system in which Perl is that of cygwin), latexmk
       reads for the first it finds of
          "/cygdrive/c/latexmk/LatexMk",
          "/opt/local/share/latexmk/LatexMk",
          "/usr/local/share/latexmk/LatexMk",
          "/usr/local/lib/latexmk/LatexMk".
          In  addition,  it then tries the same set of locations, but with the file name replaced
       "LatexMk" replaced by "latexmkrc".

       2) The user's RC file, "$HOME/.latexmkrc", if it exists.  Here $HOME is  the  user's  home
       directory.   [Latexmk determines the user's home directory as follows:  It is the value of
       the environment variable HOME, if this variable exists, which  normally  is  the  case  on
       UNIX-like  systems  (including  LINUX  and  OS-X).   Otherwise  the  environment  variable
       USERPROFILE is used, if it exists, which normally  is  the  case  on  MS-Windows  systems.
       Otherwise a blank string is used instead of $HOME.]

       3)  The  RC  file  in  the  current  working  directory.   This  file  can be named either
       "latexmkrc" or ".latexmkrc", and the first of these to be found is used, if any.

       4) Any RC file(s) specified on the command line with the -r option.

       Each RC file is a sequence of Perl commands.  Naturally, a user can use this  in  creative
       ways.   But  for  most  purposes, one simply uses a sequence of assignment statements that
       override some of the built-in settings of Latexmk.  Straightforward cases can  be  handled
       without  knowledge  of  the  Perl  language  by  using  the  examples  in this document as
       templates.  Comment lines are introduced by the "#" character.

       Note that command line options are obeyed in the order in which they are written; thus any
       RC file specified on the command line with the -r option can override previous options but
       can be itself overridden by later options on the command  line.   There  is  also  the  -e
       option, which allows initialization code to be specified in latexmk's command line.

        For possible examples of code for in an RC file, see the directory example_rcfiles in the
       distribution       of       latexmk       (e.g.,        at        http://www.ctan.org/tex-
       archive/support/latexmk/example_rcfiles).

HOW TO SET VARIABLES IN INITIALIZATION FILES

       The  important  variables  that  can  be  configured are described in the section "List of
       configuration variables  usable  in  initialization  files".   Syntax  for  setting  these
       variables is of the following forms:

                           $bibtex = 'bibtex %O %B';

       for the setting of a string variable,

                           $preview_mode = 1;

       for the setting of a numeric variable, and

                           @default_files = ('paper', 'paper1');

       for  the  setting  of  an  array of strings.  It is possible to append an item to an array
       variable as follows:

                           push @default_files, 'paper2';

       Note that simple "scalar" variables have names that begin with a  $  character  and  array
       variables have names that begin with a @ character. Each statement ends with a semicolon.

       Strings  should  be  enclosed  in single quotes.  (You could use double quotes, as in many
       programming languages.  But then the Perl  programming  language  brings  into  play  some
       special  rules  for  interpolating variables into strings.  People not fluent in Perl will
       want to avoid these complications.)

       You can do much more complicated things, but for this you will need to  consult  a  manual
       for the Perl programming language.

FORMAT OF COMMAND SPECIFICATIONS

       Some  of  the  variables set the commands that latexmk uses for carrying out its work, for
       example to generate a dvi file from a tex file or to view a postscript file.  This section
       describes some important features of how the commands are specified.

       Placeholders:   Supposed  you  wanted  latexmk  to  use the command elatex in place of the
       regular latex command, and suppose  moreover  that  you  wanted  to  give  it  the  option
       "--shell-escape".  You could do this by the following setting:

            $latex = 'elatex --shell-escape %O %S';

       The  two  items  starting with the % character are placeholders.  These are substituted by
       appropriate values before the command is run.  Thus %S will be replaced by the source file
       that  elatex  will  be applied to, and %O will be replaced by any options that latexmk has
       decided to use for this command.  (E.g., if you used the -silent option it  would  replace
       %O by "-interaction=batchmode".)

       The available placeholders are:

       %B     base  of  filename  for current command.  E.g., if a postscript file document.ps is
              being made from the dvi file document.dvi, then the basename is document.

       %D     destination file (e.g., the name of the postscript file when converting a dvi  file
              to postscript).

       %O     options

       %R     root filename.  This is the base name for the main tex file.

       %S     source file (e.g., the name of the dvi file when converting a dvi file to ps).

       %T     The name of the primary tex file.

       %Y     Name  of  directory  for  auxiliary  output  files  (see the configuration variable
              $aux_dir).  A directory separation character ('/') is appended if $aux_dir is  non-
              empty  and  does  not  end  in a suitable character, with suitable characters being
              those appropriate to UNIX and MS-Windows, i.e., ':', '/' and '\'.

       %Z     Name of directory for output files (see the configuration  variable  $out_dir).   A
              directory  separation character ('/') is appended if $out_dir is non-empty and does
              not end in a suitable character, with suitable characters being  those  appropriate
              to UNIX and MS-Windows, i.e., ':', '/' and '\'.

       If  for some reason you need a literal % character in your string not subject to the above
       rules, use a pair of these characters.  Thus with the command specification  $ps_previewer
       =  'latex -ad=%%Sfile.ad %S', the %%S will become %S when the command is executed, but the
       %S will be replaced by the source filename, which in this case would  be  the  name  of  a
       postscript file to be viewed.

       Appropriate  quoting  will be applied to the filename substitutions, so you mustn't supply
       them yourself even if the names of your files have spaces  in  them.   (But  if  your  TeX
       filenames  have  spaces  in  them,  beware  that  many  versions of the TeX program cannot
       correctly handle filenames containing spaces.)  In case latexmk's quoting  does  not  work
       correctly  on  your  system, you can turn it off -- see the documentation for the variable
       $quote_filenames.

       The distinction between %B and %R needs a bit of care, since they are often the same,  but
       not always.  For example on a simple document, the basename of a bibtex run is the same as
       for the texfile.  But in a document with several bibliographies,  the  bibliography  files
       will  have  a  variety  of  names.   Since  bibtex  is  invoked  with  the basename of the
       bibliography file, the setting for the bibtex command should therefore be

            $bibtex = 'bibtex %O %B';

       Generally, you should use %B rather than %R.  Similarly for most purposes, the name %T  of
       the primary texfile is not a useful placeholder.

       See  the  default  values  in  the  section  "List  of  configuration  variables usable in
       initialization files" for what is normally the most appropriate usage.

       If you omit to supply any placeholders whatever in the specification of a command, latexmk
       will  supply  what  its  author thinks are appropriate defaults.  This gives compatibility
       with configuration files for previous versions of latexmk, which didn't use placeholders.

       "Detaching" a command: Normally when latexmk runs a command, it waits for the  command  to
       run  to  completion.   This  is  appropriate  for commands like latex, of course.  But for
       previewers, the command should normally run detached, so that latexmk gets  the  previewer
       running  and  then returns to its next task (or exits if there is nothing else to do).  To
       achieve this effect of detaching a command, you need to  precede  the  command  name  with
       "start ", as in

            $dvi_previewer = 'start xdvi %O %S';

       This will be translated to whatever is appropriate for your operating system.

       Notes:  (1)  In some circumstances, latex will always run a command detached.  This is the
       case for a previewer in preview continuous mode, since otherwise  previewing  continuously
       makes no sense.  (2) This precludes the possibility of running a command named start.  (3)
       If the word start occurs more than once at the beginning of the command  string,  that  is
       equivalent  to having just one.  (4) Under cygwin, some complications happen, since cygwin
       amounts to a complicated merging of UNIX and MS-Windows.  See the source code for how I've
       handled the problem.

       Command  names containing spaces: Under MS-Windows it is common that the name of a command
       includes spaces, since software is  often  installed  in  a  subdirectory  of  "C:\Program
       Files".  Such command names should be enclosed in double quotes, as in

            $lpr_pdf = '"c:/Program Files/Ghostgum/gsview/gsview32.exe" /p %S';
            $pdf_previewer = 'start "c:/Program Files/SumatraPDF/SumatraPDF.exe" %O %S';
            $pdf_previewer = 'start "c:/Program Files/SumatraPDF (x86)/SumatraPDF.exe" %O %S';

       (Note  about the above example: Forward slashes are equivalent to backslashes in filenames
       under MS-Windows, provided that the filename is inside double quotes.  It is easier to use
       forward  slashes  in  examples  like  the one above, since then one does not have to worry
       about the rules for dealing with forward slashes in strings in the Perl language.)

       Command names under Cygwin: If latexmk is executed  by  Cygwin's  Perl,   be  particularly
       certain  that pathnames in commands have forward slashes not the usual backslashes for the
       separator of  pathname  components.   See  the  above  examples.   Backslashes  often  get
       misinterpreted  by  the  Unix  shell  used  by Cygwin's Perl to execute external commands.
       Forward slashes don't suffer from this problem, and (when quoted, as  above)  are  equally
       acceptable to MS-Windows.

       Using  MS-Windows  file  associations:  A useful trick under modern versions of MS-Windows
       (e.g., WinXP) is to use just the command 'start' by itself:

            $dvi_previewer = 'start %S';

       Under recent versions of MS-Windows, this will cause to be run whatever program the system
       has  associated  with  dvi  files.   (The  same  applies for a postscript viewer and a pdf
       viewer.)  But note that this trick is not always suitable for the pdf  previwer,  if  your
       system  has  acroread  for the default pdf viewer.  As explained elsewhere, acroread under
       MS-Windows does not work well with latex and latexmk, because acroread locks the pdf file.

       Not using a certain command: If a command is not to be run, the command name NONE is used,
       as in

            $lpr  = 'NONE lpr';

       This  typically  is  used  when an appropriate command does not exist on your system.  The
       string after the "NONE" is effectively a comment.

       Options to commands: Setting the name of a command can be used not only for  changing  the
       name  of the command called, but also to add options to command.  Suppose you want latexmk
       to use latex with source specials enabled.  Then you might use the following  line  in  an
       initialization file:

            $latex = 'latex --src-specials %O %S';

       Running  a  subroutine  instead  of an external command: Use a specification starting with
       "internal", as in

            $latex = 'internal mylatex %O %S';
            sub mylatex {
                my @args = @_;
                # Possible preprocessing here
                return system 'latex', @args;
            }

       Advanced tricks: Normally one specifies a single  command  for  the  commands  invoked  by
       latexmk.   Naturally, if there is some complicated additional processing you need to do in
       your special situation, you can write a script (or batch file) to do the  processing,  and
       then configure latexmk to use your script in place of the standard program.

       It  is  also possible to configure latexmk to run multiple commands.  For example, if when
       running pdflatex to generate a pdf file from a tex file you need to  run  another  program
       after pdflatex to perform some extra processing, you could do something like:

            $pdflatex = 'pdflatex --shell-escape %O %S; pst2pdf_for_latexmk %B';

       This  definition assumes you are using a UNIX-like system (which includes Linux and OS-X),
       so that the two commands to be run are separated by the semicolon in  the  middle  of  the
       string.

       If you are using MS-Windows, you would replace the above line by

          $pdflatex = 'cmd /c pdflatex --shell-escape %O %S'
                      . '&& pst2pdf_for_latexmk %B';

       Here,  the  UNIX  command  separator ; is replaced by &&.  In addition, there is a problem
       that some versions of Perl on MS-Windows do not obey the command separator;  this  problem
       is overcome by explicitly invoking the MS-Windows command-line processor cmd.exe.

LIST OF CONFIGURATION VARIABLES USABLE IN INITIALIZATION FILES

       Default values are indicated in brackets.

       $always_view_file_via_temporary [0]
              Whether ps and pdf files are initially to be made in a temporary directory and then
              moved  to  the  final  location.   (This  applies  to  dvips,  dvipdf,  and  ps2pdf
              operations,  and the filtering operators on dvi and ps files.  It does not apply to
              pdflatex, unfortunately.)

              This use of a temporary file solves a problem that the making of  these  files  can
              occupy  a  substantial  time.  If a viewer sees that the file has changed, it reads
              the new file, and this can cause havoc if the program writing the file has not  yet
              finished its work.

              See  the  $pvc_view_file_via_temporary  variable for a setting that applies only if
              preview-continuous mode (-pvc option) is used.  See $tmpdir for the setting of  the
              directory where the temporary file is created.

       $auto_rc_use [1]
              Whether to automatically read the standard initialization (rc) files, which are the
              system RC file, the user's RC file, and the RC file in the current directory.   The
              command line option -norc can be used to turn this setting off.  Each RC file could
              also turn this setting off, i.e., it could set  $auto_rc_use  to  zero  to  prevent
              automatic reading of the later RC files.

              This variable does not affect the reading of RC files specified on the command line
              by the -r option.

       $aux_dir [""]
              The directory in which auxiliary files (aux, log, etc) are to be written by  a  run
              of  (pdf)latex.  If this variable is not set, but $out_dir is set, then $aux_dir is
              set to $out_dir, which is the directory to which general output  files  are  to  be
              written.

              Important note:  The effect of $aux_dir, if different from $out_dir, is achieved by
              giving (pdf)latex the -aux-directory.  Currently (Dec. 2011 and  later)  this  only
              works on the MiKTeX version of (pdf)latex.

              See  also  the  documentation  of $out_dir for some complications on what directory
              names are suitable.

       $banner [0]
              If nonzero, the banner message is printed across each page when converting the  dvi
              file  to  postscript.   Without  modifying  the  variable  $banner_message, this is
              equivalent to specifying the -d option.

              Note that if $banner is nonzero, the $postscript_mode is assumed and the postscript
              file is always generated, even if it is newer than the dvi file.

       $banner_intensity [0.95]
              Equivalent  to  the  -bi  option,  this  is  a  decimal number between 0 and 1 that
              specifies how dark to print the banner message.  0  is  black,  1  is  white.   The
              default is just right if your toner cartridge isn't running too low.

       $banner_message ["DRAFT"]
              The  banner  message  to  print  across  each  page when converting the dvi file to
              postscript.  This is equivalent to the -bm option.

       $banner_scale [220.0]
              A decimal number that specifies how large  the  banner  message  will  be  printed.
              Experimentation  is necessary to get the right scale for your message, as a rule of
              thumb the scale should be about equal to 1100 divided by the number  of  characters
              in  the  message.   The  Default  is  just right for 5 character messages.  This is
              equivalent to the -bs option.

       @BIBINPUTS
              This is an array variable, now mostly obsolete, that  specifies  directories  where
              latexmk  should  look  for  .bib  files.   By  default it is set from the BIBINPUTS
              environment variable of the operating system.  If that environment variable is  not
              set,  a single element list consisting of the current directory is set.  The format
              of the directory names depends on your operating system, of course.   Examples  for
              setting this variable are:

                      @BIBINPUTS = ( ".", "C:\bibfiles" );
                      @BIBINPUTS = ( ".", "\\server\bibfiles" );
                      @BIBINPUTS = ( ".", "C:/bibfiles" );
                      @BIBINPUTS = ( ".", "//server/bibfiles" );
                      @BIBINPUTS = ( ".", "/usr/local/texmf/bibtex/bib" );

              Note  that under MS Windows, either a forward slash "/" or a backward slash "\" can
              be used to separate pathname components, so  the  first  two  and  the  second  two
              examples  are  equivalent.   Each backward slash should be doubled to avoid running
              afoul of Perl's rules for writing strings.

              Important note: This variable is now mostly obsolete  in  the  current  version  of
              latexmk,  since  it  has a better method of searching for files using the kpsewhich
              command.  However, if your system is an unusual one without the kpsewhich  command,
              you may need to set the variable @BIBINPUTS.

       $biber ["biber %O %S"]
              The biber processing program.

       $biber_silent_switch ["--onlylog"]
              Switch(es) for the biber processing program when silent mode is on.

       $bibtex ["bibtex %O %S"]
              The BibTeX processing program.

       $bibtex_silent_switch ["-terse"]
              Switch(es) for the BibTeX processing program when silent mode is on.

       $bibtex_use [1]
              Under  what conditions to run BibTeX or biber.  When latexmk discovers from the log
              file that one (or more) BibTeX/biber-generated bibliographies are used, it can  run
              BibTeX  or  biber  whenever it appears necessary to regenerate the bbl file(s) from
              their source bib database file(s).

              But sometimes, the bib file(s) are not available (e.g.,  for  a  document  obtained
              from  an  external  archive),  but the bbl files are provided.  In that case use of
              BibTeX or biber will result in incorrect overwriting of  the  precious  bbl  files.
              The  variable  $bibtex_use controls whether this happens.  Its possible values are:
              0: never use BibTeX or biber.  1: only use BibTeX or biber if the bib files  exist.
              2:  run  BibTeX  or  biber  whenever  it appears necessary to update the bbl files,
              without testing for the existence of the bib files.

       $cleanup_includes_cusdep_generated [0]
              If nonzero, specifies that cleanup also deletes files that are generated by  custom
              dependencies.   (When  doing  a  clean  up,  e.g.,  by use of the -C option, custom
              dependencies are those listed in the .fdb_latexmk file from a previous run.)

       $cleanup_includes_generated [0]
              If nonzero, specifies that cleanup also deletes files that are detected in log file
              as  being generated (see the \openout lines in the log file).  It will also include
              files made from these first generation generated files.

       $cleanup_mode [0]
              If nonzero, specifies cleanup mode: 1 for full cleanup, 2 for  cleanup  except  for
              dvi,  ps and pdf files, 3 for cleanup except for dep and aux files.  (There is also
              extra cleaning as specified by the $clean_ext, $clean_full_ext and  @generated_exts
              variables.)

              This  variable  is equivalent to specifying one of the -c or -C options.  But there
              should be no need to set this variable from an RC file.

       $clean_ext [""]
              Extra extensions of files for latexmk to remove when any of  the  clean-up  options
              (-c  or  -C)  is  selected.   The value of this variable is a string containing the
              extensions separated by spaces.

              It is also possible to specify a more general pattern of file  to  be  deleted,  by
              using  the  place  holder  %R,  as  in  commands,  and  it  is also possible to use
              wildcards.  Thus setting

                 $clean_ext = "out %R-blx.bib %R-figures*.log";

              in an initialization file will imply that when a clean-up operation  is  specified,
              not  only is the standard set of files deleted, but also files of the form FOO.out,
              FOO-blx.bib, and %R-figures*.log, where FOO stands for the  basename  of  the  file
              being processed (as in FOO.tex).

       $clean_full_ext [""]
              Extra  extensions  of  files  for latexmk to remove when the -C option is selected,
              i.e., extensions of files to remove when the .dvi, etc files are to be cleaned-up.

              More general patterns are allowed, as for $clean_ext.

       $compiling_cmd [undefined], $failure_cmd [undefined], $success_cmd [undefined]

              These  variables  specify  commands  that  are  executed  at  certain   points   of
              compilations during preview-continuous mode.  One motivation for their existance is
              to allow convenient visual indications of compilation status even when  the  window
              receiving the screen output of the compilation is hidden.

              The  commands  are executed at the following points: $compiling_cmd at the start of
              compilation, $success_cmd at the end of a successful compilation, and  $failure_cmd
              at  the end of an unsuccessful compilation.  If any of above variables is undefined
              (the default situation) or blank, then the corresponding command is not executed.

              An example of a typical setting of these variables is as follows

                  $compiling_cmd  =  "xdotool  search  --name  \"%D\"  set_window   --name   \"%D
              compiling\"";
                  $success_cmd   = "xdotool search --name \"%D\" set_window --name \"%D OK\"";
                  $failure_cmd     =   "xdotool  search  --name  \"%D\"  set_window  --name  \"%D
              FAILURE\"";

              These assume that the program xdotool is installed, that the previewer is using  an
              X-Window  system for display, and that the title of the window contains the name of
              the displayed file, as it normally does.   When  the  commands  are  executed,  the
              placeholder string %D is replaced by the name of the destination file, which is the
              previewed file.  The above commands result in an appropriate string being  appended
              to the filename in the window title: " compiling", " OK", or " FAILURE".

              Other  placeholders  that  can  be used are %S, %T, and %R, with %S and %T normally
              being identical. These can be useful for a command changing the title of  the  edit
              window. The visual indication in a window title can useful, since the user does not
              have to keep shifting attention to the (possibly hidden) compilation window to know
              the status of the compilation.

       @cus_dep_list [()]
              Custom dependency list -- see section on "Custom Dependencies".

       @default_files [("*.tex")]
              Default list of files to be processed.

              Normally,  if no filenames are specified on the command line, latexmk processes all
              tex files specified in the @default_files variable, which by default is set to  all
              tex  files  ("*.tex")  in  the  current directory.  This is a convenience: just run
              latexmk and it will process an appropriate set of files.  But  sometimes  you  want
              only  some of these files to be processed.  In this case you set the @default_files
              in an initialization file (e.g., the file "latexmkrc" in  the  current  directory).
              Then  if  no  files are specified on the command line then the files you specify by
              setting @default_files are processed.

              Three examples:

                   @default_files = ("paper_current");

                   @default_files = ("paper1", "paper2.tex");

                   @default_files = ("*.tex", "*.dtx");

              Note that more than file may be given, and that the default  extension  is  ".tex".
              Wild  cards  are  allowed.   The parentheses are because @default_files is an array
              variable, i.e., a sequence of filename specifications is possible.

       $dependents_phony [0]
              If a list of dependencies is output, this variable determines whether to include  a
              phony  target  for each source file.  If you use the dependents list in a Makefile,
              the dummy rules work around errors make gives if you remove  header  files  without
              updating the Makefile to match.

       $dependents_list [0]
              Whether to display a list(s) of dependencies at the end of a run.

       $deps_file ["-"]
              Name  of file to receive list(s) of dependencies at the end of a run, to be used if
              $dependesnt_list is set.  If the filename is "-", then the dependency list  is  set
              to stdout (i.e., normally the screen).

       $do_cd [0]
              Whether  to change working directory to the directory specified for the main source
              file before processing it.  The default behavior is not to do this,  which  is  the
              same  as  the behavior of latex and pdflatex programs.  This variable is set by the
              -cd and -cd- options on latexmk's command line.

       $dvi_filter [empty]
              The dvi file filter to  be  run  on  the  newly  produced  dvi  file  before  other
              processing.  Equivalent to specifying the -dF option.

       $dvi_mode [See below for default]
              If nonzero, generate a dvi version of the document.  Equivalent to the -dvi option.

              The  variable  $dvi_mode  defaults  to  0, but if no explicit requests are made for
              other types of file (postscript, pdf),  then  $dvi_mode  will  be  set  to  1.   In
              addition,  if  a  request  for a file for which a .dvi file is a prerequisite, then
              $dvi_mode will be set to 1.

       $dvi_previewer ["start xdvi %O %S" under UNIX]
              The command to invoke a dvi-previewer.  [Default is "start" under MS-WINDOWS; under
              more  recent  versions  of  Windows, this will cause to be run whatever command the
              system has associated with .dvi files.]

              Important note: Normally you will want to have a previewer run  detached,  so  that
              latexmk doesn't wait for the previewer to terminate before continuing its work.  So
              normally you should prefix the command by "start ", which flags to latexmk that  it
              should  do the detaching of the previewer itself (by whatever method is appropriate
              to the operating system).  But sometimes letting latexmk do the  detaching  is  not
              appropriate  (for a variety of non-trivial reasons), so you should put the "start "
              bit in yourself, whenever it is needed.

       $dvi_previewer_landscape ["start xdvi %O %S"]
              The command to invoke a dvi-previewer in landscape mode.  [Default is "start" under
              MS-WINDOWS;  under  more  recent  versions  of  Windows,  this will cause to be run
              whatever command the system has associated with .dvi files.]

       $dvipdf ["dvipdf %O %S %D"]
              Command to convert dvi to pdf file.  A common reconfiguration is to use the dvipdfm
              command, which needs its arguments in a different order:

                   $dvipdf = "dvipdfm %O -o %D %S";

              WARNING:  The default dvipdf script generates pdf files with bitmapped fonts, which
              do not look good when viewed by acroread.  That script should be modified  to  give
              dvips the options "-P pdf" to ensure that type 1 fonts are used in the pdf file.

       $dvipdf_silent_switch ["-q"]
              Switch(es) for dvipdf program when silent mode is on.

              N.B.  The standard dvipdf program runs silently, so adding the silent switch has no
              effect, but is actually innocuous.  But if an alternative program  is  used,  e.g.,
              dvipdfmx, then the silent switch has an effect.  The default setting is correct for
              dvipdfm and dvipdfmx.

       $dvips ["dvips %O -o %D %S"]
              The program to used as a filter to convert a .dvi file to a .ps file.   If  pdf  is
              going  to  be  generated  from  pdf, then the value of the $dvips_pdf_switch -- see
              below -- will be included in the options substituted for "%O".

       $dvips_landscape ["dvips -tlandscape %O -o %D %S"]
              The program to used as a filter to convert a .dvi file to a .ps file  in  landscape
              mode.

       $dvips_pdf_switch ["-P pdf"]
              Switch(es) for dvips program when pdf file is to be generated from ps file.

       $dvips_silent_switch ["-q"]
              Switch(es) for dvips program when silent mode is on.

       $dvi_update_command [""]
              When  the  dvi  previewer  is  set  to be updated by running a command, this is the
              command that is run.  See the information for the variable  $dvi_update_method  for
              further  information, and see information on the variable $pdf_update_method for an
              example for the analogous case of a pdf previewer.

       $dvi_update_method [2 under UNIX, 1 under MS-Windows]
              How the dvi viewer updates its display when the dvi file has changed.   The  values
              here   apply  equally  to  the  $pdf_update_method  and  to  the  $ps_update_method
              variables.
                  0 => update is automatic,
                  1=> manual update by user, which may only mean a mouse click  on  the  viewer's
              window or may mean a more serious action.
                  2  => Send the signal, whose number is in the variable $dvi_update_signal.  The
              default value under UNIX is suitable for xdvi.
                  3 => Viewer cannot do an update, because it locks the file. (As  with  acroread
              under MS-Windows.)
                  4  => run a command to do the update.  The command is specified by the variable
              $dvi_update_command.

              See information on the variable $pdf_update_method for an example  of  updating  by
              command.

       $dvi_update_signal [Under UNIX: SIGUSR1, which is a system-dependent value]
              The  number  of  the  signal  that  is sent to the dvi viewer when it is updated by
              sending a signal -- see the information on the  variable  $dvi_update_method.   The
              default value is the one appropriate for xdvi on a UNIX system.

       $failure_cmd [undefined]
              See the documentation for $compiling_cmd.

       $fdb_ext ["fdb_latexmk"]
              The  extension  of  the  file  which  latexmk  generates  to  contain a database of
              information on source files.  You will not normally need to change this.

       $force_mode [0]
              If nonzero, continue processing past  minor  latex  errors  including  unrecognized
              cross references.  Equivalent to specifying the -f option.

       @generated_exts [( aux , bbl , idx , ind , lof , lot , out , toc , $fdb_ext )]
              This  contains a list of extensions for files that are generated during a LaTeX run
              and that are read in by LaTeX in later runs, either directly or indirectly.

              This list has two uses: (a) to set the kinds of file to be  deleted  in  a  cleanup
              operation  (with the -c, -C, -CA, -g and -gg options), and (b) in the determination
              of whether a rerun of (pdf)LaTeX is needed after a run that gives an error.

              (Normally, a change of a source file during a run should  provoke  a  rerun.   This
              includes  a  file  generated  by  LaTeX,  e.g.,  an  aux  file,  that is read in on
              subsequent runs.  But after a run that results in an error, a new run should  occur
              until  the user has made a change in the files.  But the user may have corrected an
              error in a source .tex file during the run.  So latexmk needs to distinguish  user-
              generated  and  automatically  generated  files;  it  determines  the automatically
              generated files as those with extensions in the list in @generated_exts.)

              A convenient way to add an extra extension to the list, without losing the  already
              defined ones is to use a push command in the line in an RC file.  E.g.,

                              push @generated_exts, "end";

              adds  the  extension  "end"  to the list of predefined generated extensions.  (This
              extension is used by the RevTeX package, for example.)

       $go_mode [0]
              If nonzero, process files regardless of timestamps, and is then equivalent  to  the
              -g option.

       %hash_calc_ignore_pattern
              !!!This variable is for experts only!!!

              The  general rule latexmk uses for determining when an extra run of some program is
              needed is that one of the source files has changed.  But  consider  for  example  a
              latex  package  that  causes  an encapsulated postscript file (an "eps" file) to be
              made that is to be read in on the next run.   The  file  contains  a  comment  line
              giving  its  creation  date and time.  On the next run the time changes, latex sees
              that the eps file has changed, and therefore reruns latex.  This causes an infinite
              loop,  that is only terminated because latexmk has a limit on the number of runs to
              guard against pathological situations.

              But the changing line has no real effect, since it is a comment.  You can  instruct
              latex to ignore the offending line as follows:

                 $hash_calc_ignore_pattern{'eps'} = '^%%CreationDate: ';

              This creates a rule for files with extension .eps about lines to ignore.  The left-
              hand side is a Perl idiom for setting an item  in  a  hash.   Note  that  the  file
              extension  is  specified without a period.  The value, on the right-hand side, is a
              string containing a regular expresssion.  (See documentation on Perl for  how  they
              are to be specified in general.)  This particular regular expression specifies that
              lines beginning with "%%CreationDate: " are to be ignored  in  deciding  whether  a
              file of the given extension .eps has changed.

              There  is  only  one  regular expression available for each extension.  If you need
              more one pattern to specify lines to ignore, then you need to combine the  patterns
              into  a  single  regular expression.  The simplest method is separate the different
              simple patterns by a vertical bar character (indicating "alternation" in the jargon
              of regular expressions).  For example,

                 $hash_calc_ignore_pattern{'eps'} = '^%%CreationDate: |^%%Title: ';

              causes  lines  starting  with  either  "^%%CreationDate:  "  or  "^%%Title: " to be
              ignored.

              It may happen that a pattern to be ignored is  specified  in,  for  example,  in  a
              system  or  user  initialization  file,  and you wish to remove this in a file read
              later.  To do this, you use Perl's delete function, e.g.,

                  delete $hash_calc_ignore_pattern{'eps'};

       $kpsewhich ["kpsewhich %S"]
              The program called to locate a source file when the name alone is  not  sufficient.
              Most  filenames  used  by  latexmk  have  sufficient  path  information to be found
              directly.  But sometimes, notably when .bib files are found from the log file of  a
              bibtex  or biber run, the name of the file, but not its path is known.  The program
              specified by $kpsewhich is used to find it.

              See also the @BIBINPUTS variable for another way that latexmk also uses to  try  to
              locate files; it applies only in the case of .bib files.

       $landscape_mode [0]
              If  nonzero,  run in landscape mode, using the landscape mode previewers and dvi to
              postscript converters.  Equivalent to the -l  option.   Normally  not  needed  with
              current previewers.

       $latex ["latex %O %S"]
              The  LaTeX  processing program.  Note that as with other programs, you can use this
              variable not just to change the name of the program used, but also specify  options
              to the program.  E.g.,

                                  $latex = "latex --src-specials";

       %latex_input_extensions
              This  variable specifies the extensions tried by latexmk when it finds that a LaTeX
              run resulted in an error that a file has not been found,  and  the  file  is  given
              without  an  extension.   This  typically  happens  when LaTeX commands of the form
              \input{file} or \includegraphics{figure}, when the relevant source  file  does  not
              exist.

              In  this  situation,  latexmk  searches for custom dependencies to make the missing
              file(s),  but  restricts  it  to  the  extensions   specified   by   the   variable
              %latex_input_extensions.  The default extensions are 'tex' and 'eps'.

              (For Perl experts: %latex_input_extensions is a hash whose keys are the extensions.
              The values are irrelevant.)  Two subroutines are provided for manipulating this and
              the     related     variable    %pdflatex_input_extensions,    add_input_ext    and
              remove_input_ext.  They are used as in the following examples are possible lines in
              an initialization file:

                  remove_input_ext( 'latex', 'tex' );

              removes the extension 'tex' from latex_input_extensions

                  add_input_ext( 'latex', 'asdf' );

              add  the  extension  'asdf  to  latex_input_extensions.   (Naturally  with  such an
              extension, you should have made an appropriate custom dependency for  latexmk,  and
              should  also  have  done  the  appropriate  programming in the LaTeX source file to
              enable the file to be read.  The standard extensions are handled by LaTeX  and  its
              graphics/graphicx packages.

       $latex_silent_switch ["-interaction=batchmode"]
              Switch(es) for the LaTeX processing program when silent mode is on.

              If  you  use  MikTeX,  you  may  prefer the results if you configure the options to
              include -c-style-errors, e.g., by the following line in an initialization file

                $latex_silent_switch = "-interaction=batchmode -c-style-errors";

       $lpr ["lpr %O %S" under UNIX/LINUX, "NONE lpr" under MS-WINDOWS]
              The command to print postscript files.

              Under MS-Windows (unlike UNIX/LINUX), there is no  standard  program  for  printing
              files.   But  there  are  ways  you  can  do  it.   For example, if you have gsview
              installed, you could use it with the option "/p":

                  $lpr = '"c:/Program Files/Ghostgum/gsview/gsview32.exe" /p';

              If gsview is installed in  a  different  directory,  you  will  need  to  make  the
              appropriate  change.   Note  the combination of single and double quotes around the
              name.  The single quotes specify that this is  a  string  to  be  assigned  to  the
              configuration  variable  $lpr.   The double quotes are part of the string passed to
              the operating system to get the command obeyed; this is necessary because one  part
              of  the  command  name  ("Program Files") contains a space which would otherwise be
              misinterpreted.

       $lpr_dvi ["NONE lpr_dvi"]
              The printing program to print dvi files.

       $lpr_pdf ["NONE lpr_pdf"]
              The printing program to print pdf files.

              Under MS-Windows you could set this to use gsview, if it is installed, e.g.,

                  $lpr = '"c:/Program Files/Ghostgum/gsview/gsview32.exe" /p';

              If gsview is installed in  a  different  directory,  you  will  need  to  make  the
              appropriate  change.   Note  the  double  quotes around the name: this is necessary
              because one part of the command name ("Program Files") contains a space which would
              otherwise be misinterpreted.

       $make ["make"]
              The make processing program.

       $makeindex ["makeindex %O -o %D %S"]
              The index processing program.

       $makeindex_silent_switch ["-q"]
              Switch(es) for the index processing program when silent mode is on.

       $max_repeat [5]
              The  maximum  number  of times latexmk will run latex/pdflatex before deciding that
              there may be an infinite loop and that it needs to bail out, rather than  rerunning
              latex/pdflatex  again  to  resolve cross-references, etc.  The default value covers
              all normal cases.

              (Note that the "etc" covers  a  lot  of  cases  where  one  run  of  latex/pdflatex
              generates files to be read in on a later run.)

       $MSWin_back_slash [1]
              This  configuration  variable  only has an effect when latexmk is running under MS-
              Windows.  It determines whether, when a command is executed under MS-Windows, there
              should  be  substituted  "\"  for  the  separator character between components of a
              directory  name.   Internally,  latexmk  uses  "/"  for  the  directory   separator
              character, which is the character used by Unix-like systems.

              For  many  programs  under  MS-Windows,  both  "\"  and  "/"  are acceptable as the
              directory separator character.  But some programs only accept "\".  So  for  safety
              latexmk  makes  a  translation,  by  default.  It is conceivable that under certain
              situations this is undesirable, so the configuration can be changed.   (A  possible
              example  might  be  when  some  of  the software is implemented using Cygwin, which
              provides an Unix-like environment inside MS-Windows.)

       $new_viewer_always [0]
              This  variable  applies  to  latexmk   only   in   continuous-preview   mode.    If
              $new_viewer_always  is  0, latexmk will check for a previously running previewer on
              the  same  file,  and  if  one  is  running  will  not  start  a   new   one.    If
              $new_viewer_always is non-zero, this check will be skipped, and latexmk will behave
              as if no viewer is running.

       $out_dir [""]
              The directory in which output files are to be written by a run of (pdf)latex.   See
              also the variable $aux_dir.

              The  effect  of  this  variable  (when non-blank) is achieved by using the -output-
              directory option of (pdf)latex.  This exists in the usual current  (Dec.  2011  and
              later)  implementations of TeX, i.e., MiKTeX and TeXLive. But it may not be present
              in other versions.

              Commonly, the directory specified for output files is a subdirectory of the current
              working  directory.  However, if you specify some other directory, e.g., "/tmp/foo"
              or "../output", be aware that this could cause problems, e.g.,  with  makeindex  or
              bibtex.  This is because modern versions of these programs, by default, will refuse
              to work when they find that they are asked to write to a file in a  directory  that
              appears not to be the current working directory or one of its subdirectories.  This
              is part of security measures by the whole TeX system that try to prevent  malicious
              or  errant  TeX  documents  from  incorrectly  messing with a user's files.  If for
              $out_dir or $aux_dir you really do need to  specify  an  absolute  pathname  (e.g.,
              "/tmp/foo")  or  a path (e.g., "../output") that includes a higher-level directory,
              then you need to disable the security measures (and assume any risks).  This can be
              done by temporarily setting the operating system's environment variable openout_any
              to "a" (as in "all"), to override the default "paranoid" setting.

       $pdf_mode [0]
              If zero, do NOT generate a pdf version of the document.  If equal to 1, generate  a
              pdf  version of the document using pdflatex.  If equal to 2, generate a pdf version
              of the document from the ps file, by using the command  specified  by  the  $ps2pdf
              variable.  If equal to 3, generate a pdf version of the document from the dvi file,
              by using the command specified by the $dvipdf variable.

              Equivalent to the -pdf-, -pdf, -pdfdvi, -pdfps options.

       $pdflatex ["pdflatex %O %S"]
              The LaTeX processing program in a version that makes a pdf file instead  of  a  dvi
              file.

              An  example of the use of this variable is to arrange for lualatex, xelatex or some
              similar program to be used instead of pdflatex.  Note  that  lualatex  and  xelatex
              only  produce  .pdf files (and not .dvi), so to use them you will also need to turn
              on production of .pdf files, and to turn off  the  production  of  .dvi  (and  .ps)
              files,  either  by  command line options or by suitable settings in a configuration
              file. Thus to use lualatex, the following settings are appropriate:

                   $pdflatex = "lualatex %O %S";
                   $pdf_mode = 1; $postscript_mode = $dvi_mode = 0;

              To use xelatex, the corresponding settings are:

                   $pdflatex = "xelatex %O %S";
                   $pdf_mode = 1; $postscript_mode = $dvi_mode = 0;

              Another use of the same variable is to add certain options to the command line  for
              the program, e.g.,

                   $pdflatex = "pdflatex --shell-escape %O %S";

       %pdflatex_input_extensions
              This  variable  specifies  the  extensions  tried  by  latexmk when it finds that a
              pdflatex run resulted in an error that a file has not been found, and the  file  is
              given without an extension.  This typically happens when LaTeX commands of the form
              \input{file} or \includegraphics{figure}, when the relevant source  file  does  not
              exist.

              In  this  situation,  latexmk  searches for custom dependencies to make the missing
              file(s),  but  restricts  it  to  the  extensions   specified   by   the   variable
              %pdflatex_input_extensions.   The  default  extensions  are 'tex', 'pdf', 'jpg, and
              'png'.

              (For Perl  experts:  %pdflatex_input_extensions  is  a  hash  whose  keys  are  the
              extensions.   The  values  are  irrelevant.)   Two  subroutines  are  provided  for
              manipulating this and the related variable  %latex_input_extensions,  add_input_ext
              and  remove_input_ext.   They  are  used  as in the following examples are possible
              lines in an initialization file:

                  remove_input_ext( 'pdflatex', 'tex' );

              removes the extension 'tex' from pdflatex_input_extensions

                  add_input_ext( 'pdflatex', 'asdf' );

              add the extension 'asdf to  pdflatex_input_extensions.   (Naturally  with  such  an
              extension,  you  should have made an appropriate custom dependency for latexmk, and
              should also have done the appropriate programming  in  the  LaTeX  source  file  to
              enable  the  file  to be read.  The standard extensions are handled by pdflatex and
              its graphics/graphicx packages.)

       $pdflatex_silent_switch ["-interaction=batchmode"]
              Switch(es) for the pdflatex program  (specified  in  the  variable  $pdflatex  when
              silent mode is on.

              If  you  use  MikTeX,  you  may  prefer the results if you configure the options to
              include -c-style-errors, e.g., by the following line in an initialization file

                $latex_silent_switch = "-interaction=batchmode -c-style-errors";

       $pdf_previewer ["start acroread %O %S"]
              The command to invoke a pdf-previewer.

              On MS-WINDOWS, the default is changed to "cmd  /c  start  """;  under  more  recent
              versions  of  Windows,  this  will  cause to be run whatever command the system has
              associated with .pdf files.  But this may be undesirable if this association is  to
              acroread -- see the notes in the explanation of the -pvc option.]

              On OS-X the default is changed to "open %S", which results in OS-X starting up (and
              detaching) the viewer associated with the file.  By default,  for  pdf  files  this
              association is to OS-X's preview, which is quite satisfactory.

              WARNING:   Problem  under MS-Windows: if acroread is used as the pdf previewer, and
              it is actually viewing a pdf file, the pdf file  cannot  be  updated.   Thus  makes
              acroread  a  bad  choice of previewer if you use latexmk's previous-continuous mode
              (option -pvc) under MS-windows.  This problem  does  not  occur  if,  for  example,
              SumatraPDF or gsview is used to view pdf files.

              Important  note:  Normally  you will want to have a previewer run detached, so that
              latexmk doesn't wait for the previewer to terminate before continuing its work.  So
              normally  you should prefix the command by "start ", which flags to latexmk that it
              should do the detaching of the previewer itself (by whatever method is  appropriate
              to  the  operating  system).  But sometimes letting latexmk do the detaching is not
              appropriate (for a variety of non-trivial reasons), so you should put the "start  "
              bit in yourself, whenever it is needed.

       $pdf_update_command [""]
              When  the  pdf  previewer  is  set  to be updated by running a command, this is the
              command that is run.  See the information for the variable $pdf_update_method.

       $pdf_update_method [1 under UNIX, 3 under MS-Windows]
              How the pdf viewer updates its display when the  pdf  file  has  changed.  See  the
              information   on  the  variable  $dvi_update_method  for  the  codes.   (Note  that
              information needs be changed slightly so that for the value 4, to run a command  to
              do  the  update,  the command is specified by the variable $pdf_update_command, and
              for the value  2,  to  specify  update  by  signal,  the  signal  is  specified  by
              $pdf_update_signal.)

              Note  that  acroread  under  MS-Windows  (but  not UNIX) locks the pdf file, so the
              default value is then 3.

              Arranging to use a command to get a previewer  explicitly  updated  requires  three
              variables to be set.  For example:

                  $pdf_previewer = "start xpdf -remote %R %O %S";
                  $pdf_update_method = 4;
                  $pdf_update_command = "xpdf -remote %R -reload";

              The  first  setting  arranges for the xpdf program to be used in its "remote server
              mode", with the server name specified as the rootname of the TeX file.  The  second
              setting  arranges  for  updating to be done in response to a command, and the third
              setting sets the update command.

       $pdf_update_signal [Under UNIX: SIGHUP, which is a system-dependent value]
              The number of the signal that is sent to the pdf  viewer  when  it  is  updated  by
              sending  a  signal  -- see the information on the variable $pdf_update_method.  The
              default value is the one appropriate for gv on a UNIX system.

       $pid_position[1 under UNIX, -1 under MS-Windows]
              The variable $pid_position is used to specify which word in  lines  of  the  output
              from  $pscmd corresponds to the process ID.  The first word in the line is numbered
              0.  The default value of 1 (2nd word in line) is correct for Solaris 2.6 and Linux.
              Setting the variable to -1 is used to indicate that $pscmd is not to be used.

       $postscript_mode [0]
              If  nonzero,  generate a postscript version of the document.  Equivalent to the -ps
              option.

              If some other request  is  made  for  which  a  postscript  file  is  needed,  then
              $postscript_mode will be set to 1.

       $preview_continuous_mode [0]
              If  nonzero,  run a previewer to view the document, and continue running latexmk to
              keep .dvi up-to-date.  Equivalent to the  -pvc  option.   Which  previewer  is  run
              depends  on  the  other  settings,  see  the  command  line options -view=, and the
              variable $view.

       $preview_mode [0]
              If nonzero, run a previewer to preview the document.  Equivalent to the -pv option.
              Which  previewer is run depends on the other settings, see the command line options
              -view=, and the variable $view.

       $printout_mode [0]
              If nonzero, print the document using lpr.  Equivalent to the -p  option.   This  is
              recommended not to be set from an RC file, otherwise you could waste lots of paper.

       $print_type = ["auto"]
              Type  of file to printout: possibilities are "auto", "dvi", "none", "pdf", or "ps".
              See the option -print= for the meaning of the "auto" value.

       $pscmd Command used to get all the processes currently run by the user.  The  -pvc  option
              uses  the  command  specified  by  the  variable $pscmd to determine if there is an
              already running previewer, and to find the process ID (needed if latexmk  needs  to
              signal the previewer about file changes).

              Each  line  of  the output of this command is assumed to correspond to one process.
              See the $pid_position variable for how the process number is determined.

              The default for pscmd is "NONE" under MS-Windows and cygwin (i.e., the  command  is
              not  used),  "ps  --width 200 -f -u $ENV{USER}" under linux, "ps -ww -u $ENV{USER}"
              under darwin (Macintosh OS-X), and "ps -f  -u  $ENV{USER}"  under  other  operating
              systems (including other flavors of UNIX).  In these specifications "$ENV{USER}" is
              substituted by the username.

       $ps2pdf ["ps2pdf %O %S %D"]
              Command to convert ps to pdf file.

       $ps_filter [empty]
              The postscript file filter to be run on the newly produced postscript  file  before
              other processing.  Equivalent to specifying the -pF option.

       $ps_previewer ["start gv %O %S", but start %O %S under MS-WINDOWS]
              The  command to invoke a ps-previewer.  (The default under MS-WINDOWS will cause to
              be run whatever command the system has associated with .ps files.)

              Note that gv could be used with the -watch option updates its display whenever  the
              postscript  file  changes, whereas ghostview does not.  However, different versions
              of gv have slightly different ways of writing this option.  You can configure  this
              variable appropriately.

              WARNING:  Linux  systems  may  have  installed  one  (or more) versions of gv under
              different names, e.g., ggv, kghostview, etc, but perhaps not one called gv.

              Important note: Normally you will want to have a previewer run  detached,  so  that
              latexmk doesn't wait for the previewer to terminate before continuing its work.  So
              normally you should prefix the command by "start ", which flags to latexmk that  it
              should  do the detaching of the previewer itself (by whatever method is appropriate
              to the operating system).  But sometimes letting latexmk do the  detaching  is  not
              appropriate  (for a variety of non-trivial reasons), so you should put the "start "
              bit in yourself, whenever it is needed.

       $ps_previewer_landscape ["start gv -swap %O %S", but start %O %S under MS-WINDOWS]
              The command to invoke a ps-previewer in landscape mode.

       $ps_update_command [""]
              When the postscript previewer is set to be updated by running a  command,  this  is
              the command that is run.  See the information for the variable $ps_update_method.

       $ps_update_method [0 under UNIX, 1 under MS-Windows]
              How the postscript viewer updates its display when the ps file has changed. See the
              information  on  the  variable  $dvi_update_method  for  the  codes.   (Note   that
              information  needs be changed slightly so that for the value 4, to run a command to
              do the update, the command is specified by the variable $ps_update_command, and for
              the   value   2,   to  specify  update  by  signal,  the  signal  is  specified  by
              $ps_update_signal.)

       $ps_update_signal [Under UNIX: SIGHUP, which is a system-dependent value]
              The number of the signal that is sent to the pdf  viewer  when  it  is  updated  by
              sending  a  signal  --  see  $ps_update_method.   The  default  value  is  the  one
              appropriate for gv on a UNIX system.

       $pvc_view_file_via_temporary [1]
              The same  as  $always_view_file_via_temporary,  except  that  it  only  applies  in
              preview-continuous mode (-pvc option).

       $quote_filenames [1]
              This specifies whether substitutions for placeholders in command specifications (as
              in $pdflatex) are surrounded by double quotes.  If this variable is 1 (or any other
              value Perl regards as true), then quoting is done.  Otherwise quoting is omitted.

              The  quoting  method used by latexmk is tested to work correctly under UNIX systems
              (including Linux and Mac  OS-X)  and  under  MS-Windows.   It  allows  the  use  of
              filenames  containing  special  characters,  notably  spaces.   (But note that many
              versions of LaTeX and PdfLaTeX cannot correctly deal with  TeX  files  whose  names
              contain  spaces.   Latexmk's quoting only ensures that such filenames are correctly
              treated by the operating system in passing arguments to programs.)

       $recorder [0]
              Whether to use the -recorder option to latex  and  pdflatex.  Use  of  this  option
              results  in  a  file  of  extension  .fls containing a list of the files that these
              programs have read and written.  Latexmk will then use this  file  to  improve  its
              detection of source files and generated files after a run of latex or pdflatex.

              It  is  generally  recommended  to  use  this option (or to configure the $recorder
              variable to be on.)  But it only works if (pdf)latex supports the -recorder option,
              which is true for most current implementations

              Note about the name of the .fls file: Most implementations of (pdf)latex produce an
              .fls file  with  the  same  basename  as  the  main  document's  LaTeX,  e.g.,  for
              Document.tex, the .fls file is Document.fls.  However, some implementations instead
              produce files named for the program, i.e.,  latex.fls  or  pdflatex.fls.   In  this
              second  case,  latexmk  copies  the  latex.fls  or  pdflatex.fls to a file with the
              basename of the main LaTeX document, e.g., Document.fls.

       $search_path_separator [See below for default]
              The character separating paths in the environment variables  TEXINPUTS,  BIBINPUTS,
              and  BSTINPUTS.  This variable is mainly used by latexmk when the -outdir, -output-
              directory, -auxdir, and/or -aux-directory options are used.  In that  case  latexmk
              needs to communicate appropriately modified search paths to $bibtex, dvipdf, dvips,
              and (pdf)latex.

              [Comment to  technically  savvy  readers:  (pdf)latex  doesn't  actually  need  the
              modified search path, because it corrects it internally.  But, surprisingly, dvipdf
              and dvips do, because sometimes graphics files get generated in the output  or  aux
              directories.]

              The  default  under  MSWin  and Cygwin is ';' and under UNIX-like operating systems
              (including Linux and OS-X) is ':'.  Normally the defaults  give  correct  behavior.
              But  there can be difficulties if your operating system is of one kind, but some of
              your software is running under an emulator for the other kind of operating  system;
              in that case you'll need to find out what is needed, and set $search_path_separator
              explicitly.  (The same goes, of course, for unusual operating systems that are  not
              in the MSWin, Linux, OS-X, Unix collection.)

       $silence_logfile_warnings [0]
              Whether  after  a  run  of  (pdf)latex  to summarize warnings in the log file about
              undefined citations and references.  Setting $silence_logfile_warnings=0 gives  the
              summary  of  warnings  (provided silent mode isn't also set), and this is useful to
              locate undefined citations and references without searching through the  much  more
              verbose  log  file or the screen output of (pdf)latex.  But the summary can also be
              excessively annoying.  The default is not to give these warnings.  The command line
              options  -silence_logfile_warning_list  and -silence_logfile_warning_list- also set
              this variable.

              Note that multiple occurrences for the same undefined object on the same  page  and
              same line will be compressed to a single warning.

       $silent [0]
              Whether to run silently.  Setting $silent to 1 has the same effect as the -quiet of
              -silent options on the command line.

       $sleep_time [2]
              The time to sleep (in seconds)  between  checking  for  source  file  changes  when
              running  with  the  -pvc option.  This is subject to a minimum of one second delay,
              except that zero delay is also allowed.

              A value of exactly 0 gives no delay, and typically results in 100% CPU usage, which
              may not be desirable.

       $texfile_search [""]
              This is an obsolete variable, replaced by the @default_files variable.

              For backward compatibility, if you choose to set $texfile_search, it is a string of
              space-separated filenames,  and  then  latexmk  replaces  @default_files  with  the
              filenames in $texfile_search to which is added "*.tex".

       $success_cmd [undefined]
              See the documentation for $compiling_cmd.

       $tmpdir [See below for default]
              Directory to store temporary files that latexmk may generate while running.

              The  default  under MSWindows (including cygwin), is to set $tmpdir to the value of
              the first of whichever of the system environment variables TMPDIR or  TEMP  exists,
              otherwise  to the current directory.  Under other operating systems (expected to be
              UNIX/Linux, including OS-X), the default is the value  of  the  system  environment
              variable TMPDIR if it exists, otherwise "/tmp".

       $use_make_for_missing_files [0]
              Whether  to use make to try and make files that are missing after a run of latex or
              pdflatex, and for which a custom dependency has not been found.  This is  generally
              useful  only  when  latexmk  is  used as part of a bigger project which is built by
              using the make program.

              Note that once a missing file has been made, no further calls to make will be  made
              on  a  subsequent  run of latexmk to update the file.  Handling this problem is the
              job of a suitably defined Makefile.  See the section "USING latexmk WITH make"  for
              how  to  do  this.   The  intent  of  calling make from latexmk is merely to detect
              dependencies.

       $view ["default"]
              Which kind of file is to be previewed if a previewer is used.  The possible  values
              are "default", "dvi", "ps", "pdf".  The value of "default" means that the "highest"
              of the kinds of file generated is to be used (among dvi, ps and pdf).

CUSTOM DEPENDENCIES

       In any RC file a set of custom dependencies can be set up  to  convert  a  file  with  one
       extension  to  a  file  with another.  An example use of this would be to allow latexmk to
       convert a .fig file to .eps to be included in the .tex file.

       The old method of configuring latexmk was to directly manipulate the  @cus_dep_list  array
       that contains information defining the custom dependencies.  This method still works.  But
       now there are subroutines that allow convenient manipulations  of  the  custom  dependency
       list.  These are

           add_cus_dep( fromextension, toextension, must, subroutine )
           remove_cus_dep( fromextension, toextension )
           show_cus_dep()

       The custom dependency is a list of rules, each of which is specified as follow:

       from extension:
              The  extension  of  the  file we are converting from (e.g. "fig").  It is specified
              without a period.

       to extension:
              The extension of the file we are converting  to  (e.g.  "eps").   It  is  specified
              without a period.

       must:  If  non-zero, the file from which we are converting must exist, if it doesn't exist
              latexmk will give an error message and exit unless the -f option is specified.   If
              must  is  zero and the file we are converting from doesn't exist, then no action is
              taken.

       function:
              The name of the subroutine that latexmk should call to perform the file conversion.
              The  first  argument to the subroutine is the base name of the file to be converted
              without any extension.  The subroutines are declared in the syntax  of  Perl.   The
              function should return 0 if it was successful and a nonzero number if it failed.

       It  is invoked whenever latexmk detects that a run of latex/pdflatex needs to read a file,
       like a graphics file, whose extension is the to-extension of a  custom  dependency.   Then
       latexmk  examines  whether  a  file  exists with the same name, but with the corresponding
       from-extension, as specified in the custom-dependency rule.  If it does, then whenever the
       destination  file  (the  one  with  the  to-extension)  is out-of-date with respect to the
       corresponding source file.

       To make the new destination file, the Perl subroutine specified in the  rule  is  invoked,
       with  an  argument  that  is  the  base  name of the files in question.  Simple cases just
       involve a subroutine invoking an external program; this  can  be  done  by  following  the
       templates  below,  even  by  those without knowledge of the Perl programming language.  Of
       course, experts could do something much more elaborate.

       One other item in each custom-dependency rule labeled "must" above specifies how the  rule
       should be applied when the source file fails to exist.

       A simple and typical example of code in an initialization rcfile is

           add_cus_dep( 'fig', 'eps', 0, 'fig2eps' );
           sub fig2eps {
               system( "fig2dev -Leps \"$_[0].fig\" \"$_[0].eps\"" );
           }

       The  first  line  adds  a  custom dependency that converts a file with extension "fig", as
       created by the xfig program, to an encapsulated postscript  file,  with  extension  "eps".
       The  remaining  lines  define a subroutine that carries out the conversion.  If a rule for
       converting  "fig"  to  "eps"  files  already  exists  (e.g.,  from  a  previously  read-in
       initialization file), the latexmk will delete this rule before making the new one.

       Suppose  latexmk  is using this rule to convert a file "figure.fig" to "figure.eps".  Then
       it will invoke the fig2eps subroutine defined in the above code  with  a  single  argument
       "figure",  which  is  the  basename of each of the files (possibly with a path component).
       This argument is referred to by Perl as $_[0].  In the example above, the subroutine  uses
       the  Perl  command  system  to  invoke  the program fig2dev.  The double quotes around the
       string are a Perl idiom that signify that each string of the  form  of  a  variable  name,
       $_[0] in this case, is to be substituted by its value.

       If  the  return  value  of  the  subroutine is non-zero, then latexmk will assume an error
       occurred during the execution of the subroutine.  In the above example, no explicit return
       value  is given, and instead the return value is the value returned by the last (and only)
       statement, i.e., the invocation of system, which returns the value 0 on success.

       If you use pdflatex instead of latex, then  you  will  probably  prefer  to  convert  your
       graphics  files  to  pdf  format,  in  which  case  you would replace the above code in an
       initialization file by

           add_cus_dep( 'fig', 'pdf, 0, 'fig2pdf' );
           sub fig2pdf {
               system( "fig2dev -Lpdf \"$_[0].fig\" \"$_[0].pdf\"" );
           }

       Note 1: In the command lines given in the system commands in the  above  examples,  double
       quotes  have  been  inserted  around  the  file  names  (implemented  by  '\"' in the Perl
       language).  They immunize the  running  of  the  program  against  special  characters  in
       filenames.   Very often these quotes are not necessary, i.e., they can be omitted.  But it
       is normally safer to keep them in.   Even  though  the  rules  for  quoting  vary  between
       operating  systems,  command  shells  and individual pieces of software, the quotes in the
       above examples do not cause problems in the cases I have tested.

       Note 2: One case in which the quotes are important is when the files are in a subdirectory
       and  your  operating  system  is  Microsoft  Windows.   Then  the  separator character for
       directory components can be either a forward slash '/' or Microsoft's more usual  backward
       slash ยด\'.  Forward slashes are generated by latexmk, to maintain its sanity from software
       like MiKTeX that mixes both directory separators; but their correct use normally  requires
       quoted  filenames.   (See  a  log  file  from  a run of MiKTeX (at least in v. 2.9) for an
       example of the use of both directory separators.)

       If you have some general custom dependencies defined in the system or user  initialization
       file,  you may find that for a particular project they are undesirable.  So you might want
       to delete the unneeded ones.  For example, you remove any "fig" to "eps" rule by the line

           remove_cus_dep( 'fig', 'eps' );

       If you have complicated sets of custom dependencies, you may want to get a listing of  the
       custom dependencies.  This is done by using the line

           show_cus_dep();

       in an initialization file.

       Another  example of a custom dependency overcomes a limitation of latexmk concerning index
       files.  The only index-file conversion built-in to latexmk is from an ".idx" file  written
       on  one  run  of  latex/pdflatex to an ".ind" file to be read in on a subsequent run.  But
       with the index.sty  package  you  can  create  extra  indexes  with  extensions  that  you
       configure.   Latexmk  does  not  know how to deduce the extensions from the information it
       has.  But you can easily write a custom dependency.  For example if your latex  file  uses
       the  command  "\newindex{special}{ndx}{nnd}{Special index}" you will need to convert files
       with the extension .ndx to .nnd.  The following lines in an initialization  RC  file  will
       cause this to happen:

           add_cus_dep('ndx', 'nnd', 0, 'makendx2nnd');
           sub makendx2nnd {
               system( "makeindex -o \"$_[0].nnd\" \"$_[0].ndx\"" );
           }

       (You  will  need  to modify this code if you use filenames with spaces in them, to provide
       correct quoting of the filenames.)

       Those of you with experience with Makefiles, will undoubtedly be concerned that  the  .ndx
       file is written during a run of latex/pdflatex and is always later than the .nnd last read
       in.  Thus the .nnd appears to be perpetually out-of-date.   This  situation,  of  circular
       dependencies, is endemic to latex, and latexmk in its current version works correctly with
       circular dependencies.  It examines the contents of the files (by use of an md5 checksum),
       and only does a remake when the file contents have actually changed.

       Of  course  if  you  choose  to write random data to the .nnd (or and .aux file, etc) that
       changes on each new run, then you  will  have  a  problem.   For  real  experts:  See  the
       %hash_cal_ignore_pattern if you have to deal with such problems.

       Glossaries can be dealt with similarly.

OLD METHOD OF DEFINING CUSTOM DEPENDENCIES

       In  previous  versions  of latexmk, the only method of defining custom dependencies was to
       directly  manipulate  the  table  of  custom  dependencies.   This  is  contained  in  the
       @cus_dep_list  array.   It  is  an array of strings, and each string in the array has four
       items in it, each separated by a space, the from-extension, the to-extension,  the  "must"
       item,  and  the  name of the subroutine for the custom dependency.  These were all defined
       above.

       An example of the old method of defining custom dependencies is as follows. It is the code
       in an RC file to ensure automatic conversion of .fig files to .eps files:

           push @cus_dep_list, "fig eps 0 fig2eps";
           sub fig2eps {
               system( "fig2dev -Lps \"$_[0].fig\" \"$_[0].eps\"" );
           }

       This  method  still  works,  and  is  equivalent to the earlier code using the add_cus_dep
       subroutine, except that it doesn't delete any  previous  custom-dependency  for  the  same
       conversion.  So the new method is preferable.

USING latexmk WITH make
       This  section  is  targeted  only  at  advanced users who use the make program for complex
       projects, as for software development, with the dependencies specified by a Makefile.

       Now the basic task of latexmk is to run  the  appropriate  programs  to  make  a  viewable
       version  of  a  LaTeX  document.   However,  the  usual make program is not suited to this
       purpose for at least two reasons.  First is  that  the  use  of  LaTeX  involves  circular
       dependencies  (e.g.,  via  .aux  files),  and these cannot be handled by the standard make
       program.  Second is that in a large document the set of  source  files  can  change  quite
       frequently,  particularly  with  included  graphics  files;  in  this  situation keeping a
       Makefile  manually  updated  is  inappropriate  and  error-prone,  especially   when   the
       dependencies  can  be  determined  automatically.   Latexmk  solves both of these problems
       robustly.

       Thus for many standard LaTeX documents latexmk can be used  by  itself  without  the  make
       program.   In  a  complex  project  it simply needs to be suitably configured.  A standard
       configuration would be to define custom dependencies to make  graphics  files  from  their
       source  files  (e.g.,  as created by the xfig program).  Custom dependencies are latexmk's
       equivalent of pattern rules in Makefiles.

       Nevertheless there are projects for which a Makefile is appropriate, and it is  useful  to
       know  how  to  use  latexmk  from  a  Makefile.   A  typical  example would be to generate
       documentation for a software project.  Potentially the interaction with the  rest  of  the
       rules  in the Makefile could be quite complicated, for example if some of the source files
       for a LaTeX document are generated by the project's software.

       In this section, I give a couple of examples of how latexmk can be usefully invoked from a
       Makefile.   The  examples  use specific features of current versions of GNU make, which is
       the default on both linux and  OS-X  systems.   They  may  need  modifications  for  other
       versions of make.

       The  simplest  method  is  simply  to  delegate  all  the relevant tasks to latexmk, as is
       suitable for a straightforward LaTeX document.  For this a suitable Makefile is like

           .PHONY : FORCE_MAKE
           all : try.pdf
           %.pdf : %.tex FORCE_MAKE
               latexmk -pdf -dvi- -ps- $<

       (Note: the last line must be introduced by a tab for the Makefile to function  correctly!)
       Naturally,  if making try.pdf from its associated LaTeX file try.tex were the only task to
       be performed, a direct use of latexmk without a Makefile would normally  be  better.   The
       benefit of using a Makefile for a LaTeX document would be in a larger project, where lines
       such as the above would be only be a small part of a larger Makefile.

       The above example has a pattern rule for making a .pdf file from a .tex file,  and  it  is
       defined  to  use latexmk in the obvious way.  There is a conventional default target named
       "all", with a prerequisite of try.pdf.  So when make  is  invoked,  by  default  it  makes
       try.pdf.  The only complication is that there may be many source files beyond try.tex, but
       these aren't specified in the Makefile, so changes in them will not  by  themselves  cause
       latexmk  to be invoked.  Instead, the pattern rule is equipped with a "phony" prerequisite
       FORCE_MAKE; this has the effect of causing the rule to  be  always  out-of-date,  so  that
       latexmk  is  always run.  It is latexmk that decides whether any action is needed, e.g., a
       rerun of pdflatex.  Effectively the Makefile delegates all  decisions  to  latexmk,  while
       make  has  no  knowledge of the list of source files except for primary LaTeX file for the
       document.  If there are, for example, graphics files to be made, these  must  be  made  by
       custom dependencies configured in latexmk.

       But  something  better  is  needed  in  more complicated situations, for example, when the
       making of graphics files needs to be specified by rules in the Makefile.  To do this,  one
       can use a Makefile like the following:

            TARGETS = document1.pdf document2.pdf
            DEPS_DIR = .deps
            LATEXMK = latexmk -recorder -use-make -deps \
                  -e 'warn qq(In Makefile, turn off custom dependencies\n);' \
                  -e '@cus_dep_list = ();' \
                  -e 'show_cus_dep();'
            all : $(TARGETS)
            $(foreach file,$(TARGETS),$(eval -include $(DEPS_DIR)/$(file)P))
            $(DEPS_DIR) :
                   mkdir $@
            %.pdf : %.tex
                   if [ ! -e $(DEPS_DIR) ]; then mkdir $(DEPS_DIR); fi
                   $(LATEXMK) -pdf -dvi- -ps- -deps-out=$(DEPS_DIR)/$@P $<
            %.pdf : %.fig
                   fig2dev -Lpdf $< $@

       (Again,  the  lines  containing  the  commands for the rules should be started with tabs.)
       This example was inspired by how GNU automake handles automatic dependency tracking  of  C
       source files.

       After  each  run  of  latexmk,  dependency  information  is  put  in  a  file in the .deps
       subdirectory.  The Makefile causes these dependency files to be read by  make,  which  now
       has  the  full  dependency  information  for  each  target .pdf file.  To make things less
       trivial it is specificed that two files document1.pdf and document2.pdf are  the  targets.
       The dependency files are .deps/document1.pdfP and .deps/document2.pdfP.

       There  is now no need for the phony prerequisite for the rule to make .pdf files from .tex
       files.  But I have added a rule to make .pdf files from .fig files produced  by  the  xfig
       program;  these  are commonly used for graphics insertions in LaTeX documents.  Latexmk is
       arranged to output a dependency file after each run.  It is given  the  -recorder  option,
       which  improves  its  detection  of  files  generated during a run of pdflatex; such files
       should not be in the dependency list.  The -e options are used  to  turn  off  all  custom
       dependencies,  and to document this.  Instead the -use-make is used to delegate the making
       of missing files to make itself.

       Suppose in the LaTeX file there is a command \includegraphics{graph},  and  an  xfig  file
       "graph.fig"  exists.   On  a  first  run,  pdflatex reports a missing file, named "graph".
       Latexmk succeeds in making "graph.pdf" by calling "make graph.pdf", and  after  completion
       of  its work, it lists "fig.pdf" among the dependents of the file latexmk is making.  Then
       let "fig.fig" be updated, and then let make be run.  Make  first  remakes  "fig.pdf",  and
       only then reruns latexmk.

       Thus we now have a method by which all the subsidiary processing is delegated to make.

SEE ALSO

       latex(1), bibtex(1).

BUGS

       Sometimes  a  viewer  (gv) tries to read an updated .ps or .pdf file after its creation is
       started but before the file is  complete.   Work  around:  manually  refresh  (or  reopen)
       display.  Or use one of the other previewers and update methods.

       (The  following  isn't  really  a  bug,  but  concerns  features  of previewers.)  Preview
       continuous mode only works perfectly with certain previewers: Xdvi on UNIX/LINUX works for
       dvi  files.   Gv on UNIX/LINUX works for both postscript and pdf.  Ghostview on UNIX/LINUX
       needs a manual update (reopen); it views postscript  and  pdf.   Gsview  under  MS-Windows
       works  for  both  postscript  and  pdf, but only reads the updated file when its screen is
       refreshed.  Acroread under UNIX/LINUX views pdf, but the  file  needs  to  be  closed  and
       reopened  to view an updated version.  Under MS-Windows, acroread locks its input file and
       so the pdf file cannot be updated.  (Remedy: configure latexmk to use sumatrapdf instead.)

THANKS TO

       Authors of previous versions.  Many users with their feedback, and especially David Coppit
       (username  david  at node coppit.org) who made many useful suggestions that contributed to
       version 3, and Herbert Schulz.  (Please note that the e-mail addresses are not written  in
       their standard form to avoid being harvested by worms and viruses.)

AUTHOR

       Current version, by John Collins (username jcc8 at node psu.edu).  (Version 4.41).

       Released    version    can    be    obtained    from    CTAN:    <http://www.ctan.org/tex-
       archive/support/latexmk/>,       and        from        the        author's        website
       <http://www.phys.psu.edu/~collins/software/latexmk/>.
       Modifications and enhancements by Evan McLean (Version 2.0)
       Original script called "go" by David J. Musliner (RCS Version 3.2)

                                          1 January 2015                              LATEXMK(1L)