md5, sha1, sha256, sha512: add gl_SET_CRYPTO_CHECK_DEFAULT

[gnulib.git] / m4 / error.m4

diff --git a/m4/error.m4 b/m4/error.m4
index eac272a..29e6fdc 100644 (file)
--- a/m4/error.m4
+++ b/m4/error.m4
@@ -1,13 +1,27 @@
-dnl From Jim Meyering.  Use this if you use the GNU error.[ch].
-dnl FIXME: Migrate into libit
+#serial 14
 
-AC_DEFUN(AM_FUNC_ERROR_AT_LINE,
-[AC_CACHE_CHECK([for error_at_line], am_cv_lib_error_at_line,
- [AC_TRY_LINK([],[error_at_line(0, 0, "", 0, "");],
-              am_cv_lib_error_at_line=yes,
-             am_cv_lib_error_at_line=no)])
- if test $am_cv_lib_error_at_line = no; then
-   LIBOBJS="$LIBOBJS error.o"
- fi
- AC_SUBST(LIBOBJS)dnl
+# Copyright (C) 1996-1998, 2001-2004, 2009-2013 Free Software Foundation, Inc.
+#
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_ERROR],
+[
+  dnl We don't use AC_FUNC_ERROR_AT_LINE any more, because it is no longer
+  dnl maintained in Autoconf and because it invokes AC_LIBOBJ.
+  AC_CACHE_CHECK([for error_at_line], [ac_cv_lib_error_at_line],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+          [[#include <error.h>]],
+          [[error_at_line (0, 0, "", 0, "an error occurred");]])],
+       [ac_cv_lib_error_at_line=yes],
+       [ac_cv_lib_error_at_line=no])])
+])
+
+# Prerequisites of lib/error.c.
+AC_DEFUN([gl_PREREQ_ERROR],
+[
+  AC_REQUIRE([AC_FUNC_STRERROR_R])
+  :
 ])