-#serial 1
+# putenv.m4 serial 16
+dnl Copyright (C) 2002-2010 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.
dnl From Jim Meyering.
-dnl If you use this macro in a package, you should
-dnl add the following two lines to acconfig.h:
-dnl /* Define to rpl_putenv if the replacement function should be used. */
-dnl #undef putenv
dnl
+dnl Check whether putenv ("FOO") removes FOO from the environment.
+dnl The putenv in libc on at least SunOS 4.1.4 does *not* do that.
-AC_DEFUN(jm_FUNC_PUTENV,
-[AC_CACHE_CHECK([for SVID conformant putenv], jm_cv_func_svid_putenv,
- [AC_TRY_RUN([
- int
- main ()
- {
- /* Put it in env. */
- if (putenv ("CONFTEST_putenv=val"))
- exit (1);
+AC_DEFUN([gl_FUNC_PUTENV],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_CACHE_CHECK([for putenv compatible with GNU and SVID],
+ [gl_cv_func_svid_putenv],
+ [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],[[
+ /* Put it in env. */
+ if (putenv ("CONFTEST_putenv=val"))
+ return 1;
- /* Try to remove it. */
- if (putenv ("CONFTEST_putenv"))
- exit (1);
+ /* Try to remove it. */
+ if (putenv ("CONFTEST_putenv"))
+ return 1;
- /* Make sure it was deleted. */
- if (getenv ("CONFTEST_putenv") != 0)
- exit (1);
+ /* Make sure it was deleted. */
+ if (getenv ("CONFTEST_putenv") != 0)
+ return 1;
- exit (0);
- }
- ],
- jm_cv_func_svid_putenv=yes,
- jm_cv_func_svid_putenv=no,
- dnl When crosscompiling, assume putenv is broken.
- jm_cv_func_svid_putenv=no)
- ])
- if test $jm_cv_func_svid_putenv = no; then
- LIBOBJS="$LIBOBJS putenv.o"
- AC_DEFINE_UNQUOTED(putenv, rpl_putenv)
+ return 0;
+ ]])],
+ gl_cv_func_svid_putenv=yes,
+ gl_cv_func_svid_putenv=no,
+ dnl When crosscompiling, assume putenv is broken.
+ gl_cv_func_svid_putenv=no)
+ ])
+ if test $gl_cv_func_svid_putenv = no; then
+ REPLACE_PUTENV=1
+ AC_LIBOBJ([putenv])
fi
])