From: Matt Johnston <matt@ucc.asn.au>
Date: Thu, 18 Jun 2020 19:12:07 +0800
Subject: Disable toom and karatsuba for new libtommath

--- a/libtommath/tommath_class.h
+++ b/libtommath/tommath_class.h
@@ -1312,6 +1312,10 @@
 #undef BN_MP_KARATSUBA_SQR_C
 #undef BN_MP_TOOM_MUL_C
 #undef BN_MP_TOOM_SQR_C
+#undef BN_S_MP_KARATSUBA_MUL_C
+#undef BN_S_MP_KARATSUBA_SQR_C
+#undef BN_S_MP_TOOM_MUL_C
+#undef BN_S_MP_TOOM_SQR_C
 
 #include "dbmalloc.h"
 #define MP_MALLOC    m_malloc