libsmi: Define _DEFAULT_SOURCE for timegm API

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/libsmi/libsmi/0001-parser-yang-Define-_DEFAULT_SOURCE.patch

@@ -0,0 +1,28 @@
+From 86b706f694b822d8028fd36320147767056d2ffa Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Tue, 6 Sep 2022 12:09:00 -0700
+Subject: [PATCH] parser-yang: Define _DEFAULT_SOURCE
+
+This is needed for timegm API
+
+Upstream-Status: Pending
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ lib/parser-yang.y | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/lib/parser-yang.y b/lib/parser-yang.y
+index b111607..0ded9d2 100644
+--- a/lib/parser-yang.y
++++ b/lib/parser-yang.y
+@@ -21,6 +21,7 @@
+ #ifdef BACKEND_YANG
+ 
+ #define _ISOC99_SOURCE
++#define _DEFAULT_SOURCE
+ #include <stdio.h>
+ #include <errno.h>
+ #include <stdlib.h>
+-- 
+2.37.3
+

meta-oe/recipes-support/libsmi/libsmi_0.5.0.bb

@@ -8,6 +8,7 @@ SRC_URI = "https://www.ibr.cs.tu-bs.de/projects/${BPN}/download/${BP}.tar.gz \
            file://smi.conf \
            file://libsmi-fix-the-test-dump-files.patch \
            file://0001-Define-createIdentifierRef-prototype-in-yang-complex.patch \
+           file://0001-parser-yang-Define-_DEFAULT_SOURCE.patch \
           "
 
 SRC_URI[md5sum] = "4bf47483c06c9f07d1b10fbc74eddf11"