xenial (1) autoheader2.13.1.gz

NAME

       autoheader2.13 - creates a template file of C #define's for use by configure.

SYNOPSIS

       autoheader2.13 [ --help | -h ] [ --localdir=dir | -l dir ] [ --macrodir=dir | -m dir ] [ --version ]

DESCRIPTION

       The  autoheader2.13  program can create a template file of C #define statements for configure to use.  If
       configure.in invokes AC_CONFIG_HEADER(FILE), autoheader2.13 creates FILE.in; if multiple  file  arguments
       are given, the first one is used.  Otherwise, autoheader2.13 creates config.h.in.

       If  you  give autoheader2.13 an argument, it uses that file instead of configure.in and writes the header
       file to the standard output instead of to config.h.in.  If you give autoheader2.13 an argument of  -,  it
       reads the standard input instead of configure.in and writes the header file to the standard output.

       autoheader2.13  scans  configure.in  and  figures  out  which C preprocessor symbols it might define.  It
       copies comments and #define and #undef statements from a file called acconfig.h, which comes with and  is
       installed with Autoconf.  It also uses a file called acconfig.h in the current directory, if present.  If
       you AC_DEFINE any additional symbols, you must create that file  with  entries  for  them.   For  symbols
       defined  by  AC_CHECK_HEADERS, AC_CHECK_FUNCS, AC_CHECK_SIZEOF, or AC_CHECK_LIB, autoheader2.13 generates
       comments and #undef statements itself rather than copying them from a file, since  the  possible  symbols
       are effectively limitless.

       The file that autoheader2.13 creates contains mainly #define and #undef statements and their accompanying
       comments.  If ./acconfig.h contains the string @TOP@, autoheader2.13 copies the  lines  before  the  line
       containing  @TOP@  into  the  top of the file that it generates.  Similarly, if ./acconfig.h contains the
       string @BOTTOM@, autoheader2.13 copies the lines after that line to the end of  the  file  it  generates.
       Either or both of those strings may be omitted.

       An  alternate  way  to  produce  the same effect is to create the files FILE.top (typically config.h.top)
       and/or FILE.bot in the current directory.  If they exist, autoheader2.13 copies them to the beginning and
       end, respectively, of its output.  Their use is discouraged because they have file names that contain two
       periods, and so can not be stored on MS-DOS; also, they are two more files to clutter up  the  directory.
       But  if  you use the --localdir=DIR option to use an acconfig.h in another directory, they give you a way
       to put custom boilerplate in each individual config.h.in.

       autoheader2.13 accepts the following options:

       --help

       -h     Print a summary of the command line options and exit.

       --localdir=DIR

       -l DIR Look for the package files aclocal.m4 and acconfig.h (but not FILE.top and FILE.bot) in  directory
              DIR instead of in the current directory.

       --macrodir=DIR

       -m DIR Look  for  the  installed  macro  files  and  acconfig.h  in  directory DIR.  You can also set the
              AC_MACRODIR environment variable to a directory; this option overrides the environment variable.

       --version
              Print the version number of Autoconf and exit.

SEE ALSO

       autoconf2.13(1), autoreconf2.13(1), autoscan2.13(1), autoupdate2.13(1), ifnames2.13(1)

AUTHORS

       David MacKenzie, with help from Franc,ois Pinard, Karl Berry, Richard Pixley, Ian  Lance  Taylor,  Roland
       McGrath,   Noah  Friedman,  David  D.  Zuhn,  and  many  others.   This  manpage  written  by  Ben  Pfaff
       <pfaffben@debian.org> for the Debian GNU/Linux autoconf2.13 package.

                                                    Autoconf                                       AUTOHEADER(1)