From 5f80858cbad6c9442484d84815c02339b6e2bcb9 Mon Sep 17 00:00:00 2001
From: Lucas De Marchi <lucas.demarchi@intel.com>
Date: Tue, 19 Apr 2016 01:29:44 -0300
Subject: [PATCH] waf: use system extensions

In several places we use functions like asprintf() that are only
available in libc when _GNU_SOURCE is defined. Always define _GNU_SOURCE
since we always want to use them.

This fixes the build on Windows using cygwin.
---
 wscript | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/wscript b/wscript
index 13f7e62fb1..080cf6e94f 100644
--- a/wscript
+++ b/wscript
@@ -114,6 +114,9 @@ def configure(cfg):
     if cfg.options.submodule_update:
         cfg.env.SUBMODULE_UPDATE = True
 
+    # Always use system extensions
+    cfg.define('_GNU_SOURCE', 1)
+
     cfg.write_config_header(os.path.join(cfg.variant, 'ap_config.h'))
 
 def collect_dirs_to_recurse(bld, globs, **kw):