-#serial 1
+# putenv.m4 serial 9
+dnl Copyright (C) 2002, 2003, 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.
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_DEFUN([gl_FUNC_PUTENV],
[AC_CACHE_CHECK([for SVID conformant putenv], jm_cv_func_svid_putenv,
[AC_TRY_RUN([
int
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)
+ AC_LIBOBJ(putenv)
+ AC_DEFINE(putenv, rpl_putenv,
+ [Define to rpl_putenv if the replacement function should be used.])
+ gl_PREREQ_PUTENV
fi
])
+
+# Prerequisites of lib/putenv.c.
+AC_DEFUN([gl_PREREQ_PUTENV], [
+ AC_CHECK_HEADERS_ONCE(unistd.h)
+])