From d802762be1aede291559009d13280e4b95a87ca0 Mon Sep 17 00:00:00 2001
From: James Prestwood <prestwoj@gmail.com>
Date: Fri, 10 Jun 2022 12:52:42 -0700
Subject: [PATCH] build: ignore unknown warnings/pragmas for CC=clang

IWD uses a few pragmas to ignore warnings which clang does
not support. For -Werror builds these cause build failures
but can be fixed by ignoring unknown warnings and pragmas.
---
 acinclude.m4 | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/acinclude.m4 b/acinclude.m4
index a66a3746..3fd96236 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -64,4 +64,9 @@ AC_DEFUN([COMPILER_FLAGS], [
 			CFLAGS+=" -Wcast-align"
 		fi
 	fi
+
+	if (test "$CC" = "clang"); then
+		CFLAGS+=" -Wno-unknown-warning-option"
+		CFLAGS+=" -Wno-unknown-pragmas"
+	fi
 ])