-# setenv.m4 serial 2 (gettext-0.11.1)
-dnl Copyright (C) 2001-2002 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License. As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# setenv.m4 serial 5
+dnl Copyright (C) 2001-2004 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.
+
+AC_DEFUN([gt_FUNC_SETENV],
+[
+ AC_REPLACE_FUNCS(setenv unsetenv)
+ if test $ac_cv_func_setenv = no; then
+ gl_PREREQ_SETENV
+ fi
+ if test $ac_cv_func_unsetenv = no; then
+ gl_PREREQ_UNSETENV
+ else
+ AC_CACHE_CHECK([for unsetenv() return type], gt_cv_func_unsetenv_ret,
+ [AC_TRY_COMPILE([#include <stdlib.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+#if defined(__STDC__) || defined(__cplusplus)
+int unsetenv (const char *name);
+#else
+int unsetenv();
+#endif
+], , gt_cv_func_unsetenv_ret='int', gt_cv_func_unsetenv_ret='void')])
+ if test $gt_cv_func_unsetenv_ret = 'void'; then
+ AC_DEFINE(VOID_UNSETENV, 1, [Define if unsetenv() returns void, not int.])
+ fi
+ fi
+])
# Check if a variable is properly declared.
# gt_CHECK_VAR_DECL(includes,variable)
AC_DEFUN([gt_CHECK_VAR_DECL],
[
- define(gt_cv_var, [gt_cv_var_]$2[_declaration])
+ 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
fi
])
-# Prerequisites of lib/setenv.c
-
-AC_DEFUN([gt_FUNC_SETENV],
+# Prerequisites of lib/setenv.c.
+AC_DEFUN([gl_PREREQ_SETENV],
[
- AC_REPLACE_FUNCS(setenv unsetenv)
- AC_CHECK_HEADERS(search.h stdlib.h string.h unistd.h)
+ AC_REQUIRE([AC_FUNC_ALLOCA])
+ AC_CHECK_HEADERS_ONCE(unistd.h)
+ AC_CHECK_HEADERS(search.h)
AC_CHECK_FUNCS(tsearch)
gt_CHECK_VAR_DECL([#include <errno.h>], errno)
gt_CHECK_VAR_DECL([#include <unistd.h>], environ)
])
+
+# Prerequisites of lib/unsetenv.c.
+AC_DEFUN([gl_PREREQ_UNSETENV],
+[
+ AC_CHECK_HEADERS_ONCE(unistd.h)
+ gt_CHECK_VAR_DECL([#include <errno.h>], errno)
+ gt_CHECK_VAR_DECL([#include <unistd.h>], environ)
+])