md5, sha1, sha256, sha512: use openssl routines if available

[gnulib.git] / m4 / sha512.m4

diff --git a/m4/sha512.m4 b/m4/sha512.m4
index f4a6bf1..d929195 100644 (file)
--- a/m4/sha512.m4
+++ b/m4/sha512.m4
@@ -1,4 +1,4 @@
-# sha512.m4 serial 8
+# sha512.m4 serial 9
 dnl Copyright (C) 2005-2006, 2008-2013 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -8,5 +8,7 @@ AC_DEFUN([gl_SHA512],
 [
   dnl Prerequisites of lib/sha512.c.
   AC_REQUIRE([gl_BIGENDIAN])
-  :
+
+  dnl Determine HAVE_OPENSSL_SHA512 and LIB_CRYPTO
+  gl_CRYPTO_CHECK([SHA512])
 ])