NAME

       ExtUtils::MM_Unix - methods used by ExtUtils::MakeMaker

SYNOPSIS

       "require ExtUtils::MM_Unix;"

DESCRIPTION

       The methods provided by this package are designed to be used in conjunction with
       ExtUtils::MakeMaker. When MakeMaker writes a Makefile, it creates one or more objects that
       inherit their methods from a package "MM". MM itself doesn't provide any methods, but it
       ISA ExtUtils::MM_Unix class. The inheritance tree of MM lets operating specific packages
       take the responsibility for all the methods provided by MM_Unix. We are trying to reduce
       the number of the necessary overrides by defining rather primitive operations within
       ExtUtils::MM_Unix.

       If you are going to write a platform specific MM package, please try to limit the
       necessary overrides to primitive methods, and if it is not possible to do so, let's work
       out how to achieve that gain.

       If you are overriding any of these methods in your Makefile.PL (in the MY class), please
       report that to the makemaker mailing list. We are trying to minimize the necessary method
       overrides and switch to data driven Makefile.PLs wherever possible. In the long run less
       methods will be overridable via the MY class.

METHODS

       The following description of methods is still under development. Please refer to the code
       for not suitably documented sections and complain loudly to the makemaker@perl.org mailing
       list.  Better yet, provide a patch.

       Not all of the methods below are overridable in a Makefile.PL. Overridable methods are
       marked as (o). All methods are overridable by a platform specific MM_*.pm file.

       Cross-platform methods are being moved into MM_Any.  If you can't find something that used
       to be in here, look in MM_Any.

   Methods
       os_flavor
           Simply says that we're Unix.

       c_o (o)
           Defines the suffix rules to compile different flavors of C files to object files.

       xs_obj_opt
           Takes the object file as an argument, and returns the portion of compile command-line
           that will output to the specified object file.

       cflags (o)
           Does very much the same as the cflags script in the perl distribution. It doesn't
           return the whole compiler command line, but initializes all of its parts. The
           const_cccmd method then actually returns the definition of the CCCMD macro which uses
           these parts.

       const_cccmd (o)
           Returns the full compiler call for C programs and stores the definition in
           CONST_CCCMD.

       const_config (o)
           Sets SHELL if needed, then defines a couple of constants in the Makefile that are
           imported from %Config.

       const_loadlibs (o)
           Defines EXTRALIBS, LDLOADLIBS, BSLOADLIBS, LD_RUN_PATH. See ExtUtils::Liblist for
           details.

       constants (o)
             my $make_frag = $mm->constants;

           Prints out macros for lots of constants.

       depend (o)
           Same as macro for the depend attribute.

       init_DEST
             $mm->init_DEST

           Defines the DESTDIR and DEST* variables paralleling the INSTALL*.

       init_dist
             $mm->init_dist;

           Defines a lot of macros for distribution support.

             macro         description                     default

             TAR           tar command to use              tar
             TARFLAGS      flags to pass to TAR            cvf

             ZIP           zip command to use              zip
             ZIPFLAGS      flags to pass to ZIP            -r

             COMPRESS      compression command to          gzip --best
                           use for tarfiles
             SUFFIX        suffix to put on                .gz
                           compressed files

             SHAR          shar command to use             shar

             PREOP         extra commands to run before
                           making the archive
             POSTOP        extra commands to run after
                           making the archive

             TO_UNIX       a command to convert linefeeds
                           to Unix style in your archive

             CI            command to checkin your         ci -u
                           sources to version control
             RCS_LABEL     command to label your sources   rcs -Nv$(VERSION_SYM): -q
                           just after CI is run

             DIST_CP       $how argument to manicopy()     best
                           when the distdir is created

             DIST_DEFAULT  default target to use to        tardist
                           create a distribution

             DISTVNAME     name of the resulting archive   $(DISTNAME)-$(VERSION)
                           (minus suffixes)

       dist (o)
             my $dist_macros = $mm->dist(%overrides);

           Generates a make fragment defining all the macros initialized in init_dist.

           %overrides can be used to override any of the above.

       dist_basics (o)
           Defines the targets distclean, distcheck, skipcheck, manifest, veryclean.

       dist_ci (o)
           Defines a check in target for RCS.

       dist_core (o)
             my $dist_make_fragment = $MM->dist_core;

           Puts the targets necessary for 'make dist' together into one make fragment.

       dist_target
             my $make_frag = $MM->dist_target;

           Returns the 'dist' target to make an archive for distribution.  This target simply
           checks to make sure the Makefile is up-to-date and depends on $(DIST_DEFAULT).

       tardist_target
             my $make_frag = $MM->tardist_target;

           Returns the 'tardist' target which is simply so 'make tardist' works.  The real work
           is done by the dynamically named tardistfile_target() method, tardist should have that
           as a dependency.

       zipdist_target
             my $make_frag = $MM->zipdist_target;

           Returns the 'zipdist' target which is simply so 'make zipdist' works.  The real work
           is done by the dynamically named zipdistfile_target() method, zipdist should have that
           as a dependency.

       tarfile_target
             my $make_frag = $MM->tarfile_target;

           The name of this target is the name of the tarball generated by tardist.  This target
           does the actual work of turning the distdir into a tarball.

       zipfile_target
             my $make_frag = $MM->zipfile_target;

           The name of this target is the name of the zip file generated by zipdist.  This target
           does the actual work of turning the distdir into a zip file.

       uutardist_target
             my $make_frag = $MM->uutardist_target;

           Converts the tarfile into a uuencoded file

       shdist_target
             my $make_frag = $MM->shdist_target;

           Converts the distdir into a shell archive.

       dlsyms (o)
           Used by some OS' to define DL_FUNCS and DL_VARS and write the *.exp files.

           Normally just returns an empty string.

       dynamic_bs (o)
           Defines targets for bootstrap files.

       dynamic_lib (o)
           Defines how to produce the *.so (or equivalent) files.

       xs_dynamic_lib_macros
           Defines the macros for the "dynamic_lib" section.

       xs_make_dynamic_lib
           Defines the recipes for the "dynamic_lib" section.

       exescan
           Deprecated method. Use libscan instead.

       extliblist
           Called by init_others, and calls ext ExtUtils::Liblist. See ExtUtils::Liblist for
           details.

       find_perl
           Finds the executables PERL and FULLPERL

       fixin
             $mm->fixin(@files);

           Inserts the sharpbang or equivalent magic number to a set of @files.

       force (o)
           Writes an empty FORCE: target.

       guess_name
           Guess the name of this package by examining the working directory's name. MakeMaker
           calls this only if the developer has not supplied a NAME attribute.

       has_link_code
           Returns true if C, XS, MYEXTLIB or similar objects exist within this object that need
           a compiler. Does not descend into subdirectories as needs_linking() does.

       init_dirscan
           Scans the directory structure and initializes DIR, XS, XS_FILES, C, C_FILES, O_FILES,
           H, H_FILES, PL_FILES, EXE_FILES.

           Called by init_main.

       init_MANPODS
           Determines if man pages should be generated and initializes MAN1PODS and MAN3PODS as
           appropriate.

       init_MAN1PODS
           Initializes MAN1PODS from the list of EXE_FILES.

       init_MAN3PODS
           Initializes MAN3PODS from the list of PM files.

       init_PM
           Initializes PMLIBDIRS and PM from PMLIBDIRS.

       init_DIRFILESEP
           Using / for Unix.  Called by init_main.

       init_main
           Initializes AR, AR_STATIC_ARGS, BASEEXT, CONFIG, DISTNAME, DLBASE, EXE_EXT, FULLEXT,
           FULLPERL, FULLPERLRUN, FULLPERLRUNINST, INST_*, INSTALL*, INSTALLDIRS, LIB_EXT,
           LIBPERL_A, MAP_TARGET, NAME, OBJ_EXT, PARENT_NAME, PERL, PERL_ARCHLIB, PERL_INC,
           PERL_LIB, PERL_SRC, PERLRUN, PERLRUNINST, PREFIX, VERSION, VERSION_SYM, XS_VERSION.

       init_tools
           Initializes tools to use their common (and faster) Unix commands.

       init_linker
           Unix has no need of special linker flags.

       init_PERL
               $mm->init_PERL;

           Called by init_main.  Sets up ABSPERL, PERL, FULLPERL and all the *PERLRUN*
           permutations.

               PERL is allowed to be miniperl
               FULLPERL must be a complete perl

               ABSPERL is PERL converted to an absolute path

               *PERLRUN contains everything necessary to run perl, find it's
                    libraries, etc...

               *PERLRUNINST is *PERLRUN + everything necessary to find the
                    modules being built.

       init_platform
       platform_constants
           Add MM_Unix_VERSION.

       init_PERM
             $mm->init_PERM

           Called by init_main.  Initializes PERL_*

       init_xs
               $mm->init_xs

           Sets up macros having to do with XS code.  Currently just INST_STATIC, INST_DYNAMIC
           and INST_BOOT.

       install (o)
           Defines the install target.

       installbin (o)
           Defines targets to make and to install EXE_FILES.

       linkext (o)
           Defines the linkext target which in turn defines the LINKTYPE.

       lsdir
           Takes as arguments a directory name and a regular expression. Returns all entries in
           the directory that match the regular expression.

       macro (o)
           Simple subroutine to insert the macros defined by the macro attribute into the
           Makefile.

       makeaperl (o)
           Called by staticmake. Defines how to write the Makefile to produce a static new perl.

           By default the Makefile produced includes all the static extensions in the perl
           library. (Purified versions of library files, e.g., DynaLoader_pure_p1_c0_032.a are
           automatically ignored to avoid link errors.)

       makefile (o)
           Defines how to rewrite the Makefile.

       maybe_command
           Returns true, if the argument is likely to be a command.

       needs_linking (o)
           Does this module need linking? Looks into subdirectory objects (see also
           has_link_code())

       parse_abstract
           parse a file and return what you think is the ABSTRACT

       parse_version
               my $version = MM->parse_version($file);

           Parse a $file and return what $VERSION is set to by the first assignment.  It will
           return the string "undef" if it can't figure out what $VERSION is. $VERSION should be
           for all to see, so "our $VERSION" or plain $VERSION are okay, but "my $VERSION" is
           not.

           "<package Foo VERSION"> is also checked for.  The first version declaration found is
           used, but this may change as it differs from how Perl does it.

           parse_version() will try to "use version" before checking for $VERSION so the
           following will work.

               $VERSION = qv(1.2.3);

       pasthru (o)
           Defines the string that is passed to recursive make calls in subdirectories. The
           variables like "PASTHRU_DEFINE" are used in each level, and passed downwards on the
           command-line with e.g. the value of that level's DEFINE. Example:

               # Level 0 has DEFINE = -Dfunky
               # This code will define level 0's PASTHRU=PASTHRU_DEFINE="$(DEFINE)
               #     $(PASTHRU_DEFINE)"
               # Level 0's $(CCCMD) will include macros $(DEFINE) and $(PASTHRU_DEFINE)
               # So will level 1's, so when level 1 compiles, it will get right values
               # And so ad infinitum

       perl_script
           Takes one argument, a file name, and returns the file name, if the argument is likely
           to be a perl script. On MM_Unix this is true for any ordinary, readable file.

       perldepend (o)
           Defines the dependency from all *.h files that come with the perl distribution.

       pm_to_blib
           Defines target that copies all files in the hash PM to their destination and
           autosplits them. See "DESCRIPTION" in ExtUtils::Install

       ppd Defines target that creates a PPD (Perl Package Description) file for a binary
           distribution.

       prefixify
             $MM->prefixify($var, $prefix, $new_prefix, $default);

           Using either $MM->{uc $var} || $Config{lc $var}, it will attempt to replace it's
           $prefix with a $new_prefix.

           Should the $prefix fail to match AND a PREFIX was given as an argument to
           WriteMakefile() it will set it to the $new_prefix + $default.  This is for systems
           whose file layouts don't neatly fit into our ideas of prefixes.

           This is for heuristics which attempt to create directory structures that mirror those
           of the installed perl.

           For example:

               $MM->prefixify('installman1dir', '/usr', '/home/foo', 'man/man1');

           this will attempt to remove '/usr' from the front of the $MM->{INSTALLMAN1DIR} path
           (initializing it to $Config{installman1dir} if necessary) and replace it with
           '/home/foo'.  If this fails it will simply use '/home/foo/man/man1'.

       processPL (o)
           Defines targets to run *.PL files.

       specify_shell
           Specify SHELL if needed - not done on Unix.

       quote_paren
           Backslashes parentheses "()" in command line arguments.  Doesn't handle recursive
           Makefile "$(...)" constructs, but handles simple ones.

       replace_manpage_separator
             my $man_name = $MM->replace_manpage_separator($file_path);

           Takes the name of a package, which may be a nested package, in the form 'Foo/Bar.pm'
           and replaces the slash with "::" or something else safe for a man page file name.
           Returns the replacement.

       cd
       oneliner
       quote_literal
           Quotes macro literal value suitable for being used on a command line so that when
           expanded by make, will be received by command as given to this method:

             my $quoted = $mm->quote_literal(q{it isn't});
             # returns:
             #   'it isn'\''t'
             print MAKEFILE "target:\n\techo $quoted\n";
             # when run "make target", will output:
             #   it isn't

       escape_newlines
       max_exec_len
           Using POSIX::ARG_MAX.  Otherwise falling back to 4096.

       static (o)
           Defines the static target.

       xs_make_static_lib
           Defines the recipes for the "static_lib" section.

       static_lib_closures
           Records "$(EXTRALIBS)" in extralibs.ld and $(PERL_SRC)/ext.libs.

       static_lib_fixtures
           Handles copying "$(MYEXTLIB)" as starter for final static library that then gets added
           to.

       static_lib_pure_cmd
           Defines how to run the archive utility.

       staticmake (o)
           Calls makeaperl.

       subdir_x (o)
           Helper subroutine for subdirs

       subdirs (o)
           Defines targets to process subdirectories.

       test (o)
           Defines the test targets.

       test_via_harness (override)
           For some reason which I forget, Unix machines like to have PERL_DL_NONLAZY set for
           tests.

       test_via_script (override)
           Again, the PERL_DL_NONLAZY thing.

       tool_xsubpp (o)
           Determines typemaps, xsubpp version, prototype behaviour.

       all_target
           Build man pages, too

       top_targets (o)
           Defines the targets all, subdirs, config, and O_FILES

       writedoc
           Obsolete, deprecated method. Not used since Version 5.21.

       xs_c (o)
           Defines the suffix rules to compile XS files to C.

       xs_cpp (o)
           Defines the suffix rules to compile XS files to C++.

       xs_o (o)
           Defines suffix rules to go from XS to object files directly. This was originally only
           intended for broken make implementations, but is now necessary for per-XS file under
           "XSMULTI", since each XS file might have an individual "$(VERSION)".

SEE ALSO

       ExtUtils::MakeMaker