From e1965094ad8a7601c98b158f7fc5f34ef4d4e165 Mon Sep 17 00:00:00 2001
From: David Garske <david@wolfssl.com>
Date: Fri, 1 Apr 2022 09:23:37 -0700
Subject: [PATCH] Add check for ULONG_MAX in SP math to detect if pre-processor
 correctly handles 64-bit types.

---
 wolfssl/wolfcrypt/sp_int.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/wolfssl/wolfcrypt/sp_int.h b/wolfssl/wolfcrypt/sp_int.h
index 794a67480..4492bdee9 100644
--- a/wolfssl/wolfcrypt/sp_int.h
+++ b/wolfssl/wolfcrypt/sp_int.h
@@ -95,7 +95,9 @@ extern "C" {
     #error "Size of unsigned int not detected"
 #endif
 
-#if ULONG_MAX == 18446744073709551615ULL
+#if ULONG_MAX == 18446744073709551615ULL && \
+        4294967295UL != 18446744073709551615ULL /* verify pre-processor supports
+                                                * 64-bit ULL types */
     #define SP_ULONG_BITS    64
 
     typedef unsigned long sp_uint64;