(gettext.info.gz) configure

 
 13.4.5 `configure.in' at top level
 ----------------------------------
 
 `configure.in' or `configure.ac' - this is the source from which
 `autoconf' generates the `configure' script.
 
   1. Declare the package and version.  
 
      This is done by a set of lines like these:
 
           PACKAGE=gettext
           VERSION=0.16.1
           AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE")
           AC_DEFINE_UNQUOTED(VERSION, "$VERSION")
           AC_SUBST(PACKAGE)
           AC_SUBST(VERSION)
 
      or, if you are using GNU `automake', by a line like this:
 
           AM_INIT_AUTOMAKE(gettext, 0.16.1)
 
      Of course, you replace `gettext' with the name of your package,
      and `0.16.1' by its version numbers, exactly as they should appear
      in the packaged `tar' file name of your distribution
      (`gettext-0.16.1.tar.gz', here).
 
   2. Check for internationalization support.
 
      Here is the main `m4' macro for triggering internationalization
      support.  Just add this line to `configure.in':
 
           AM_GNU_GETTEXT
 
      This call is purposely simple, even if it generates a lot of
      configure time checking and actions.
 
      If you have suppressed the `intl/' subdirectory by calling
      `gettextize' without `--intl' option, this call should read
 
           AM_GNU_GETTEXT([external])
 
   3. Have output files created.
 
      The `AC_OUTPUT' directive, at the end of your `configure.in' file,
      needs to be modified in two ways:
 
           AC_OUTPUT([EXISTING CONFIGURATION FILES intl/Makefile po/Makefile.in],
           [EXISTING ADDITIONAL ACTIONS])
 
      The modification to the first argument to `AC_OUTPUT' asks for
      substitution in the `intl/' and `po/' directories.  Note the `.in'
      suffix used for `po/' only.  This is because the distributed file
      is really `po/Makefile.in.in'.
 
      If you have suppressed the `intl/' subdirectory by calling
      `gettextize' without `--intl' option, then you don't need to add
      `intl/Makefile' to the `AC_OUTPUT' line.
 
 
    If, after doing the recommended modifications, a command like
 `aclocal -I m4' or `autoconf' or `autoreconf' fails with a trace
 similar to this:
 
      configure.ac:44: warning: AC_COMPILE_IFELSE was called before AC_GNU_SOURCE
      ../../lib/autoconf/specific.m4:335: AC_GNU_SOURCE is expanded from...
      m4/lock.m4:224: gl_LOCK is expanded from...
      m4/gettext.m4:571: gt_INTL_SUBDIR_CORE is expanded from...
      m4/gettext.m4:472: AM_INTL_SUBDIR is expanded from...
      m4/gettext.m4:347: AM_GNU_GETTEXT is expanded from...
      configure.ac:44: the top level
      configure.ac:44: warning: AC_RUN_IFELSE was called before AC_GNU_SOURCE
 
 you need to add an explicit invocation of `AC_GNU_SOURCE' in the
 `configure.ac' file - after `AC_PROG_CC' but before `AM_GNU_GETTEXT',
 most likely very close to the `AC_PROG_CC' invocation.  This is
 necessary because of ordering restrictions imposed by GNU autoconf.
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