From c77d06e70d59cbc6e3c22bf644bb0b197a5fc182 Mon Sep 17 00:00:00 2001 From: Yann Droneaud Date: Fri, 8 Apr 2022 10:46:07 +0200 Subject: kbuild: support W=e to make build abort in case of warning When developing new code/feature, CONFIG_WERROR is most often turned off, especially for people using make W=12 to get more warnings. In such case, turning on -Werror temporarily would require switching on CONFIG_WERROR in the configuration, building, then switching off CONFIG_WERROR. For this use case, this patch introduces a new 'e' modifier to W= as a short hand for KCFLAGS+=-Werror" so that -Werror got added to the kernel (built-in) and modules' CFLAGS. Signed-off-by: Yann Droneaud Signed-off-by: Masahiro Yamada --- scripts/Makefile.extrawarn | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) (limited to 'scripts/Makefile.extrawarn') diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index 650d0b8ceec3..f5f0d6f09053 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -2,8 +2,8 @@ # ========================================================================== # make W=... settings # -# There are three warning groups enabled by W=1, W=2, W=3. -# They are independent, and can be combined like W=12 or W=123. +# There are four warning groups enabled by W=1, W=2, W=3, and W=e +# They are independent, and can be combined like W=12 or W=123e. # ========================================================================== KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned) @@ -94,3 +94,12 @@ KBUILD_CFLAGS += $(call cc-option, -Wpacked-bitfield-compat) KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN3 endif + +# +# W=e - error out on warnings +# +ifneq ($(findstring e, $(KBUILD_EXTRA_WARN)),) + +KBUILD_CFLAGS += -Werror + +endif -- cgit v1.2.3