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Annotation of embedaddon/libiconv/srcm4/environ.m4, revision 1.1.1.1

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: ])