-# setenv.m4 serial 3
-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],
[
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
])
AC_DEFUN([gl_PREREQ_SETENV],
[
AC_REQUIRE([AC_FUNC_ALLOCA])
- AC_CHECK_HEADERS_ONCE(stdlib.h string.h unistd.h)
+ AC_CHECK_HEADERS_ONCE(unistd.h)
AC_CHECK_HEADERS(search.h)
AC_CHECK_FUNCS(tsearch)
gt_CHECK_VAR_DECL([#include <errno.h>], errno)
# Prerequisites of lib/unsetenv.c.
AC_DEFUN([gl_PREREQ_UNSETENV],
[
- AC_CHECK_HEADERS_ONCE(stdlib.h string.h unistd.h)
+ AC_CHECK_HEADERS_ONCE(unistd.h)
gt_CHECK_VAR_DECL([#include <errno.h>], errno)
gt_CHECK_VAR_DECL([#include <unistd.h>], environ)
])