more fixes :P

[xonotic/d0_blind_id.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 50ee2805611608d87eb889ca3786b30bc942b579..63d299262b64983bed03017632f43f235ad48117 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,12 @@ AM_INIT_AUTOMAKE([-Wall foreign])
 AC_PROG_CC
 AC_PROG_LIBTOOL
 
-AC_SEARCH_LIBS(__gmpz_init, gmp, , [AC_MSG_ERROR([GNU MP not found, see http://gmplib.org/])])
+AC_ARG_WITH(openssl, AS_HELP_STRING([--with-openssl], [Use OpenSSL instead of GMP (beware of the OpenSSL license)]), [with_openssl=$enableval], [with_openssl=no])
+AM_CONDITIONAL(WITH_OPENSSL, [test x"$with_openssl" != xno])
+
+AS_IF([test x"$with_openssl" != xno],
+       [AC_SEARCH_LIBS(BN_init, ssl, , [AC_MSG_ERROR([OpenSSL not found, see http://www.openssl.org/, or try --without-openssl])])],
+       [AC_SEARCH_LIBS(__gmpz_init, gmp, , [AC_MSG_ERROR([GNU MP not found, see http://gmplib.org/, or try --with-openssl])])])
 
 AC_ARG_ENABLE(rijndael, AS_HELP_STRING([--disable-rijndael], [Disable build of the d0_rijndael library]), [enable_aes=$enableval], [enable_aes=yes])
 AM_CONDITIONAL(ENABLE_RIJNDAEL, [test x$enable_aes = xyes])