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      1 # getopt.m4 serial 12
      2 dnl Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
      3 dnl This file is free software; the Free Software Foundation
      4 dnl gives unlimited permission to copy and/or distribute it,
      5 dnl with or without modifications, as long as this notice is preserved.
      6 
      7 # The getopt module assume you want GNU getopt, with getopt_long etc,
      8 # rather than vanilla POSIX getopt.  This means your your code should
      9 # always include <getopt.h> for the getopt prototypes.
     10 
     11 AC_DEFUN([gl_GETOPT_SUBSTITUTE],
     12 [
     13   AC_LIBOBJ([getopt])
     14   AC_LIBOBJ([getopt1])
     15   gl_GETOPT_SUBSTITUTE_HEADER
     16   gl_PREREQ_GETOPT
     17 ])
     18 
     19 AC_DEFUN([gl_GETOPT_SUBSTITUTE_HEADER],
     20 [
     21   GETOPT_H=getopt.h
     22   AC_DEFINE([__GETOPT_PREFIX], [[rpl_]],
     23     [Define to rpl_ if the getopt replacement functions and variables
     24      should be used.])
     25   AC_SUBST([GETOPT_H])
     26 ])
     27 
     28 AC_DEFUN([gl_GETOPT_CHECK_HEADERS],
     29 [
     30   if test -z "$GETOPT_H"; then
     31     AC_CHECK_HEADERS([getopt.h], [], [GETOPT_H=getopt.h])
     32   fi
     33 
     34   if test -z "$GETOPT_H"; then
     35     AC_CHECK_FUNCS([getopt_long_only], [], [GETOPT_H=getopt.h])
     36   fi
     37 
     38   dnl BSD getopt_long uses an incompatible method to reset option processing,
     39   dnl and (as of 2004-10-15) mishandles optional option-arguments.
     40   if test -z "$GETOPT_H"; then
     41     AC_CHECK_DECL([optreset], [GETOPT_H=getopt.h], [], [#include <getopt.h>])
     42   fi
     43 
     44   dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
     45   dnl option string (as of 2005-05-05).
     46   if test -z "$GETOPT_H"; then
     47     AC_CACHE_CHECK([for working GNU getopt function], [gl_cv_func_gnu_getopt],
     48       [AC_RUN_IFELSE(
     49 	[AC_LANG_PROGRAM([#include <getopt.h>],
     50 	   [[
     51 	     char *myargv[3];
     52 	     myargv[0] = "conftest";
     53 	     myargv[1] = "-+";
     54 	     myargv[2] = 0;
     55 	     return getopt (2, myargv, "+a") != '?';
     56 	   ]])],
     57 	[gl_cv_func_gnu_getopt=yes],
     58 	[gl_cv_func_gnu_getopt=no],
     59 	[dnl cross compiling - pessimistically guess based on decls
     60 	 dnl Solaris 10 getopt doesn't handle `+' as a leading character in an
     61 	 dnl option string (as of 2005-05-05).
     62 	 AC_CHECK_DECL([getopt_clip],
     63 	   [gl_cv_func_gnu_getopt=no], [gl_cv_func_gnu_getopt=yes],
     64 	   [#include <getopt.h>])])])
     65     if test "$gl_cv_func_gnu_getopt" = "no"; then
     66       GETOPT_H=getopt.h
     67     fi
     68   fi
     69 ])
     70 
     71 AC_DEFUN([gl_GETOPT_IFELSE],
     72 [
     73   AC_REQUIRE([gl_GETOPT_CHECK_HEADERS])
     74   AS_IF([test -n "$GETOPT_H"], [$1], [$2])
     75 ])
     76 
     77 AC_DEFUN([gl_GETOPT], [gl_GETOPT_IFELSE([gl_GETOPT_SUBSTITUTE])])
     78 
     79 # Prerequisites of lib/getopt*.
     80 AC_DEFUN([gl_PREREQ_GETOPT],
     81 [
     82   AC_CHECK_DECLS_ONCE([getenv])
     83 ])
     84