From 8f5cdac36df9020aebbab0ccb17270177b9deb6f Mon Sep 17 00:00:00 2001
From: Orgad Shaneh <orgad.shaneh@audiocodes.com>
Date: Thu, 16 May 2019 10:28:20 +0300
Subject: [PATCH] Subject: [PATCH] Fix bzero misdetection also for GCC >=8

The fix in 1d6128d1fe76e6148cd9955db38be39481526f65 worked for
MinGW with GCC7, but GCC8 evidentially got smarter, and it
also substitutes bzero->memset for larger arrays.

Set the emitted warning as an error to avoid misdetection.
---
 CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e70522e35..fa7521d3b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -719,6 +719,9 @@ endif()
 
 CHECK_C_SOURCE_COMPILES(
 	"#include <strings.h>
+	#if __GNUC__
+	#pragma GCC diagnostic error \"-Wimplicit-function-declaration\"
+	#endif
 	int main(int argc, char **argv) { char buf[100]; bzero(buf, 100); return 0; }
 	" LWS_HAVE_BZERO)
 CHECK_C_SOURCE_COMPILES(