From de3ee3f63400a23954e7c1ad1cb8c20f29ab6fe3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micka=C3=ABl=20Sala=C3=BCn?= <mic@digikod.net>
Date: Fri, 9 Sep 2022 12:39:01 +0200
Subject: [PATCH] selftests: Use optional USERCFLAGS and USERLDFLAGS
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Git-commit: de3ee3f63400a23954e7c1ad1cb8c20f29ab6fe3
Patch-mainline: v6.2-rc1
References: git-fixes

This change enables to extend CFLAGS and LDFLAGS from command line, e.g.
to extend compiler checks: make USERCFLAGS=-Werror USERLDFLAGS=-static

USERCFLAGS and USERLDFLAGS are documented in
Documentation/kbuild/makefiles.rst and Documentation/kbuild/kbuild.rst

This should be backported (down to 5.10) to improve previous kernel
versions testing as well.

Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: stable@vger.kernel.org
Signed-off-by: Mickaël Salaün <mic@digikod.net>
Link: https://lore.kernel.org/r/20220909103901.1503436-1-mic@digikod.net
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 tools/testing/selftests/lib.mk | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/lib.mk b/tools/testing/selftests/lib.mk
index 9d4cb94cf437..f4196832b823 100644
--- a/tools/testing/selftests/lib.mk
+++ b/tools/testing/selftests/lib.mk
@@ -123,6 +123,11 @@ endef
 clean:
 	$(CLEAN)
 
+# Enables to extend CFLAGS and LDFLAGS from command line, e.g.
+# make USERCFLAGS=-Werror USERLDFLAGS=-static
+CFLAGS += $(USERCFLAGS)
+LDFLAGS += $(USERLDFLAGS)
+
 # When make O= with kselftest target from main level
 # the following aren't defined.
 #
-- 
2.35.3