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Diffstat (limited to 'gnulib-m4/environ.m4')
-rw-r--r--gnulib-m4/environ.m429
1 files changed, 20 insertions, 9 deletions
diff --git a/gnulib-m4/environ.m4 b/gnulib-m4/environ.m4
index 5f50d6e..4dbf947 100644
--- a/gnulib-m4/environ.m4
+++ b/gnulib-m4/environ.m4
@@ -1,5 +1,5 @@
-# environ.m4 serial 3
-dnl Copyright (C) 2001-2004, 2006-2010 Free Software Foundation, Inc.
+# environ.m4 serial 6
+dnl Copyright (C) 2001-2004, 2006-2015 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
@@ -9,7 +9,16 @@ AC_DEFUN_ONCE([gl_ENVIRON],
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
dnl Persuade glibc <unistd.h> to declare environ.
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
- gt_CHECK_VAR_DECL([#include <unistd.h>], environ)
+
+ AC_CHECK_HEADERS_ONCE([unistd.h])
+ gt_CHECK_VAR_DECL(
+ [#if HAVE_UNISTD_H
+ #include <unistd.h>
+ #endif
+ /* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>. */
+ #include <stdlib.h>
+ ],
+ [environ])
if test $gt_cv_var_environ_declaration != yes; then
HAVE_DECL_ENVIRON=0
fi
@@ -22,14 +31,16 @@ AC_DEFUN([gt_CHECK_VAR_DECL],
define([gt_cv_var], [gt_cv_var_]$2[_declaration])
AC_MSG_CHECKING([if $2 is properly declared])
AC_CACHE_VAL([gt_cv_var], [
- AC_TRY_COMPILE([$1
- extern struct { int foo; } $2;],
- [$2.foo = 1;],
- gt_cv_var=no,
- gt_cv_var=yes)])
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[$1
+ extern struct { int foo; } $2;]],
+ [[$2.foo = 1;]])],
+ [gt_cv_var=no],
+ [gt_cv_var=yes])])
AC_MSG_RESULT([$gt_cv_var])
if test $gt_cv_var = yes; then
- AC_DEFINE([HAVE_]translit($2, [a-z], [A-Z])[_DECL], 1,
+ AC_DEFINE([HAVE_]m4_translit($2, [a-z], [A-Z])[_DECL], 1,
[Define if you have the declaration of $2.])
fi
undefine([gt_cv_var])