From f7b1b00487de5ee0212a7252d10fd23e7db17522 Mon Sep 17 00:00:00 2001
From: Orgad Shaneh <orgad.shaneh@audiocodes.com>
Date: Sun, 30 Aug 2020 14:35:27 +0300
Subject: [PATCH] openssl: allow build with old glibc headers

strnlen requires _GNU_SOURCE prior to glibc 2.10.
---
 lib/tls/openssl/openssl-client.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/tls/openssl/openssl-client.c b/lib/tls/openssl/openssl-client.c
index 985a63f3a..b98b9758a 100644
--- a/lib/tls/openssl/openssl-client.c
+++ b/lib/tls/openssl/openssl-client.c
@@ -21,6 +21,12 @@
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  * IN THE SOFTWARE.
  */
+
+#include "lws_config.h"
+#ifdef LWS_HAVE_X509_VERIFY_PARAM_set1_host
+/* Before glibc 2.10, strnlen required _GNU_SOURCE */
+#define _GNU_SOURCE
+#endif
 #include <string.h>
 
 #include "private-lib-core.h"