From 20786e86c5d91faa735c1534df1cafa53746d5f8 Mon Sep 17 00:00:00 2001
From: Arun Persaud <arun@nubati.net>
Date: Mon, 16 Apr 2012 19:08:10 -0700
Subject: [PATCH] enable -Wall -Wno-parentheses for all compilers that understand them

---
 configure.ac |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index ddd71d3..119f002 100644
--- a/configure.ac
+++ b/configure.ac
@@ -110,6 +110,15 @@ AC_CHECK_FUNC(setlocale, [],
 
 AC_CHECK_LIB(seq, getpseudotty)
 
+dnl | add compiler warnings only if compiler understands them
+AC_MSG_CHECKING(whether compiler understands -Wall -Wno-parentheses)
+SAVE_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -Wall -Wno-parentheses"
+AC_TRY_COMPILE([],[],
+  AC_MSG_RESULT(yes),
+  AC_MSG_RESULT(no)
+  CFLAGS="$SAVE_CFLAGS")
+
 
 dnl | check for X-libraries
 AC_PATH_XTRA
-- 
1.7.0.4