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From: https://github.com/xdp-project/xdp-tools/commit/344b241da22a5358c714d6db1ea6f225f951dbdb
From 344b241da22a5358c714d6db1ea6f225f951dbdb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Holger=20Hoffst=C3=A4tte?= <holger@applied-asynchrony.com>
Date: Wed, 8 Mar 2023 18:50:56 +0100
Subject: [PATCH] xdpdump: fix build with clang
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When building all of xdp-tools with clang, the xdp-dump build fails
due to 'classic' use of variable-length arrays and -Werror.
Disable the warning and leave a breadcrumb to the discussion.
Fixes: #304
Signed-off-by: Holger Hoffstätte <holger@applied-asynchrony.com>
---
xdp-dump/Makefile | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/xdp-dump/Makefile b/xdp-dump/Makefile
index 7ee1688e..a9ae0ae7 100644
--- a/xdp-dump/Makefile
+++ b/xdp-dump/Makefile
@@ -4,6 +4,10 @@ XDP_TARGETS := xdpdump_bpf xdpdump_xdp
USER_TARGETS := xdpdump
TEST_FILE := tests/test-xdpdump.sh
+# Disable warnings about VLAs not being at the end of a structure when building
+# with clang. The code is fine, but clang's complaint coupled with -Werror would
+# break the build. See https://github.com/xdp-project/xdp-tools/issues/304
+CFLAGS += "-Wno-gnu-variable-sized-type-not-at-end"
LIB_DIR = ../lib
USER_LIBS = -lpcap
MAN_PAGE := xdpdump.8
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