From 37fb3503c4b1467d2b28f407b9c27c1de147869e Mon Sep 17 00:00:00 2001
From: Tuncer Ayaz <tuncer.ayaz@gmail.com>
Date: Thu, 11 Oct 2012 19:13:46 +0200
Subject: If GCC is used, treat -Wreturn-type as error

---
 lib/erl_interface/configure.in | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'lib/erl_interface/configure.in')

diff --git a/lib/erl_interface/configure.in b/lib/erl_interface/configure.in
index 97f1cff345..d511f2e240 100644
--- a/lib/erl_interface/configure.in
+++ b/lib/erl_interface/configure.in
@@ -273,6 +273,8 @@ esac
 AC_SUBST(WFLAGS)
 
 if test "x$GCC" = xyes; then
+  # Treat certain GCC warnings as errors
+  LM_TRY_ENABLE_CFLAG([-Werror=return-type], [WERRORFLAGS])
   WFLAGS="-Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -Winline"
   # check which GCC version
   GCC_VERSION=`$CC -v 2>&1 | sed -n 's/gcc version //p'`
@@ -287,8 +289,10 @@ if test "x$GCC" = xyes; then
     *)
         WFLAGS="$WFLAGS -fno-strict-aliasing";;
   esac
+  CFLAGS="$WERRORFLAGS $CFLAGS"
 else
   WFLAGS=""
+  WERRORFLAGS=""
 fi
 
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