gentoo-overlay/dev-libs/libverto/files/libverto-Wflags.patch

From f3935464e3a823539394dcb4669a6e7a889a95ef Mon Sep 17 00:00:00 2001
From: Robbie Harwood <rharwood@redhat.com>
Date: Wed, 31 Jan 2018 18:21:04 +0100
Subject: [PATCH] Turn off -Wcast-function-type

The glib event library forces all callbacks to the same type, even
when they have different arities.  Turn off the gcc warning for this
gross behavior.
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 4084965..dcab593 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,7 +9,7 @@ m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
 
 AC_PROG_CC_C99
 
-for flag in -Wall -Wextra; do
+for flag in -Wall -Wextra -Wno-cast-function-type; do
   OLD_CFLAGS=$CFLAGS
   CFLAGS="$CFLAGS $flag"
   AC_TRY_COMPILE(, [return 0;], [], [CFLAGS=$OLD_CFLAGS])