From 7277fe5a2bf8ecb74267c3ddc179aeafd3462407 Mon Sep 17 00:00:00 2001
From: versat <versat@users.noreply.github.com>
Date: Thu, 19 Sep 2019 12:27:21 +0200
Subject: [PATCH] gnu.cfg: Add support for macro __extension__

The macro does nothing except preventing from warnings when compiling
with "pedantic" or other options.
---
 cfg/gnu.cfg    | 1 +
 test/cfg/gnu.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/cfg/gnu.cfg b/cfg/gnu.cfg
index 4aeb309d1..97f562b75 100644
--- a/cfg/gnu.cfg
+++ b/cfg/gnu.cfg
@@ -46,6 +46,7 @@
   <define name="__builtin_nanf(str)" value="nanf(str)"/>
   <define name="__builtin_nanl(str)" value="nanl(str)"/>
   <define name="__builtin_signbit(value)" value="signbit(value)"/>
+  <define name="__extension__" value=""/>
   <!-- void *__builtin_alloca (size_t size) -->
   <!-- alloca() is often defined as __builtin_alloca() so the define above does not work always -->
   <!-- void *alloca(size_t size); -->
diff --git a/test/cfg/gnu.c b/test/cfg/gnu.c
index d97f6e459..f4895e16e 100644
--- a/test/cfg/gnu.c
+++ b/test/cfg/gnu.c
@@ -137,6 +137,9 @@ void valid_code(int argInt1, va_list valist_arg)
     if (vasprintf(&pStr, "%d %d", valist_arg) != -1) {
         free(pStr);
     }
+
+    printf("%d", 0b010);
+    printf("%d", __extension__ 0b10001000);
 }
 
 void ignoreleak(void)