From e6783c99f051c6d8252db5f388d805cef0e16357 Mon Sep 17 00:00:00 2001
From: Joshua Watt <JPEWhacker@gmail.com>
Date: Thu, 20 Feb 2020 15:20:45 -0600
Subject: [PATCH] build: Fix strndup detection on MinGW

GCC and meson conspire together to incorrectly detect that strndup()
exists on MinGW as __builtin_strndup, when no such function exists. As a
work around, meson will skip looking for __builtin functions if an
'#include' is in the prefix, so add '#include <string.h>' when looking
for strndup().

See: https://github.com/mesonbuild/meson/issues/3672

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Upstream-Status: Submitted [https://gitlab.freedesktop.org/wayland/wayland/merge_requests/63]
---
 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/meson.build
+++ b/meson.build
@@ -36,11 +36,11 @@ have_funcs = [
 	'posix_fallocate',
 	'prctl',
 	'memfd_create',
-	'strndup',
 ]
 foreach f: have_funcs
 	config_h.set('HAVE_' + f.underscorify().to_upper(), cc.has_function(f))
 endforeach
+config_h.set('HAVE_STRNDUP', cc.has_function('strndup') and cc.has_header_symbol('string.h', 'strndup'))
 
 if get_option('libraries')
 	ffi_dep = dependency('libffi')