-# strerror.m4 serial 2
-dnl Copyright (C) 2002 Free Software Foundation, Inc.
+# strerror.m4 serial 4
+dnl Copyright (C) 2002, 2007 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_STRERROR],
[
- AC_REPLACE_FUNCS(strerror)
+ AC_REQUIRE([gl_FUNC_STRERROR_SEPARATE])
+ if test $gl_cv_func_working_strerror = no; then
+ AC_LIBOBJ([strerror])
+ AC_DEFINE_UNQUOTED([REPLACE_STRERROR], [$REPLACE_STRERROR],
+ [Define this to 1 if strerror is broken.])
+ fi
+])
+
+# Like gl_FUNC_STRERROR, except prepare for separate compilation (no AC_LIBOBJ).
+AC_DEFUN([gl_FUNC_STRERROR_SEPARATE],
+[
+ AC_CHECK_FUNCS_ONCE([strerror])
+ gl_PREREQ_STRERROR
if test $ac_cv_func_strerror = no; then
- gl_PREREQ_STRERROR
+ HAVE_DECL_STRERROR=0
+ gl_cv_func_working_strerror=no
+ else
+ AC_CACHE_CHECK([for working strerror function],
+ [gl_cv_func_working_strerror],
+ [AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([
+#include <string.h>
+ ], [return !*strerror (-2);])],
+ [gl_cv_func_working_strerror=yes], [gl_cv_func_working_strerror=no],
+ [dnl assume success except on Interix
+ AC_EGREP_CPP([assuming success], [
+#ifndef __INTERIX
+ assuming success
+#endif
+ ], [gl_cv_func_working_strerror=yes],
+ [gl_cv_func_working_strerror=no])])])
+ if test $gl_cv_func_working_strerror = no ; then
+ REPLACE_STRERROR=1
+ fi
fi
])