fix: Disable warnings for GNU extensions on Clang

Some versions of Clang enabled '-Wgnu' in '-Wall', since we rely on
GNUisms in the code this results in numerous errors. Check if the
compiler accepts '-Wno-gnu' to disable those warnings.

Change-Id: I9d1126744e427a6cf7c18e219cae5431227a43c0
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/configure.ac b/configure.ac
index b5c3bee6f6ca7ee01512b714c03efcb8e01d9451..27f86dde7c6a367fec9f5beebba696cdcb021784 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -162,6 +162,7 @@ m4_define([WARN_FLAGS_LIST], [ dnl
   -Wno-sign-compare dnl
   -Wno-missing-field-initializers dnl
   -Wno-null-dereference dnl
+  -Wno-gnu dnl Disable warnings for GNU extensions on Clang
 ])
 
 # Pass -Werror as an extra flag during the test: this is needed to make the