-# putenv.m4 serial 16
-dnl Copyright (C) 2002-2010 Free Software Foundation, Inc.
+# putenv.m4 serial 20
+dnl Copyright (C) 2002-2014 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([gl_FUNC_PUTENV],
[
AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([for putenv compatible with GNU and SVID],
[gl_cv_func_svid_putenv],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],[[
/* Try to remove it. */
if (putenv ("CONFTEST_putenv"))
- return 1;
+ return 2;
/* Make sure it was deleted. */
if (getenv ("CONFTEST_putenv") != 0)
- return 1;
+ return 3;
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)
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_svid_putenv="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_svid_putenv="guessing no" ;;
+ esac
+ ])
])
- if test $gl_cv_func_svid_putenv = no; then
- REPLACE_PUTENV=1
- AC_LIBOBJ([putenv])
- fi
+ case "$gl_cv_func_svid_putenv" in
+ *yes) ;;
+ *)
+ REPLACE_PUTENV=1
+ ;;
+ esac
+])
+
+# Prerequisites of lib/putenv.c.
+AC_DEFUN([gl_PREREQ_PUTENV],
+[
+ AC_CHECK_DECLS([_putenv])
])