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Annotation of embedaddon/libiconv/srcm4/environ.m4, revision 1.1

1.1     ! misho       1: # environ.m4 serial 2
        !             2: dnl Copyright (C) 2001-2004, 2006-2009 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: AC_DEFUN([gl_ENVIRON],
        !             8: [
        !             9:   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
        !            10:   dnl Persuade glibc <unistd.h> to declare environ.
        !            11:   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
        !            12:   gt_CHECK_VAR_DECL([#include <unistd.h>], environ)
        !            13:   if test $gt_cv_var_environ_declaration != yes; then
        !            14:     HAVE_DECL_ENVIRON=0
        !            15:   fi
        !            16: ])
        !            17: 
        !            18: # Check if a variable is properly declared.
        !            19: # gt_CHECK_VAR_DECL(includes,variable)
        !            20: AC_DEFUN([gt_CHECK_VAR_DECL],
        !            21: [
        !            22:   define([gt_cv_var], [gt_cv_var_]$2[_declaration])
        !            23:   AC_MSG_CHECKING([if $2 is properly declared])
        !            24:   AC_CACHE_VAL([gt_cv_var], [
        !            25:     AC_TRY_COMPILE([$1
        !            26:       extern struct { int foo; } $2;],
        !            27:       [$2.foo = 1;],
        !            28:       gt_cv_var=no,
        !            29:       gt_cv_var=yes)])
        !            30:   AC_MSG_RESULT([$gt_cv_var])
        !            31:   if test $gt_cv_var = yes; then
        !            32:     AC_DEFINE([HAVE_]translit($2, [a-z], [A-Z])[_DECL], 1,
        !            33:               [Define if you have the declaration of $2.])
        !            34:   fi
        !            35:   undefine([gt_cv_var])
        !            36: ])