[yocto] [psplash][PATCH 1/5] configure: add -Wextra GCC flag

[Richard Leitner]

Enable extra warnings when using GCC.

Signed-off-by: Richard Leitner <richard.leitner at skidata.com>
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index bf00e91..1c4d919 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,7 +9,7 @@ AC_PROG_CC
 AC_STDC_HEADERS
 
 if test "x$GCC" = "xyes"; then
-        GCC_FLAGS="-g -Wall"
+        GCC_FLAGS="-g -Wall -Wextra"
 fi
 
 AC_SUBST(GCC_FLAGS)
-- 
2.1.4