From 22d7f32fdaa58e9bb81f93d0b5c07aa410d3bf8c Mon Sep 17 00:00:00 2001
From: elivdahan <elivdahan@gmail.com>
Date: Mon, 1 Apr 2019 09:38:20 +0300
Subject: [PATCH] cmake: Fix bzero mis-detection on MinGW
Using a C compiler ignores non-existent functions, and tries to link them anyway.
The compiler optimizes `bzero(buf, 1)` to `movb $0x0,0xf(%esp)`, so bzero is
not called at all, and the linker succeeds.
Increase the buffer size to 100 to avoid this optimization.
---
CMakeLists.txt | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 453fdfd2..9a70e0a6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -683,7 +683,7 @@ endif()
CHECK_C_SOURCE_COMPILES(
"#include <strings.h>
- int main(int argc, char **argv) { char buf[1]; bzero(buf, 1); return 0; }
+ int main(int argc, char **argv) { char buf[100]; bzero(buf, 100); return 0; }
" LWS_HAVE_BZERO)
CHECK_FUNCTION_EXISTS(fork LWS_HAVE_FORK)
--
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