AC_CHECK_DECL(EVP_sha512,
[AC_DEFINE([XMLTOOLING_OPENSSL_HAVE_SHA2],[1],[Define to 1 if OpenSSL supports the SHA-2 hash family.])],
,[#include <openssl/evp.h>])
AC_CHECK_DECL(EVP_sha512,
[AC_DEFINE([XMLTOOLING_OPENSSL_HAVE_SHA2],[1],[Define to 1 if OpenSSL supports the SHA-2 hash family.])],
,[#include <openssl/evp.h>])