From 7341b54a202902cae8f30e9738a1056d76bb01c3 Mon Sep 17 00:00:00 2001
From: Daniel Pouzzner <douzzer@wolfssl.com>
Date: Sat, 8 Jan 2022 00:34:33 -0600
Subject: [PATCH] wolfssl/wolfcrypt/tfm.h: fixes for cppcheck complaints:
 preprocessorErrorDirective[division/modulo by zero]

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

diff --git a/wolfssl/wolfcrypt/tfm.h b/wolfssl/wolfcrypt/tfm.h
index 6ca36ebc5..54ce49ded 100644
--- a/wolfssl/wolfcrypt/tfm.h
+++ b/wolfssl/wolfcrypt/tfm.h
@@ -277,6 +277,9 @@
 #define FP_MAX_SIZE           (FP_MAX_BITS+(8*DIGIT_BIT))
 
 /* will this lib work? */
+#if CHAR_BIT == 0
+   #error CHAR_BIT must be nonzero
+#endif
 #if (CHAR_BIT & 7)
    #error CHAR_BIT must be a multiple of eight.
 #endif