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authorMasahiro Yamada <masahiroy@kernel.org>2022-12-06 07:07:30 +0300
committerMasahiro Yamada <masahiroy@kernel.org>2022-12-11 11:28:00 +0300
commitefa80b028c7a9c74fd875517aa0fc9fd8d610ed0 (patch)
tree2c69df482339eea896d39b3a9aa2d76aa39fa330 /Makefile
parent4bf73588165ba7d32131a043775557a54b6e1db5 (diff)
downloadlinux-efa80b028c7a9c74fd875517aa0fc9fd8d610ed0.tar.xz
kbuild: move -Werror from KBUILD_CFLAGS to KBUILD_CPPFLAGS
CONFIG_WERROR turns warnings into errors, which happens only for *.c files because -Werror is added to KBUILD_CFLAGS. Adding it to KBUILD_CPPFLAGS makes more sense because preprocessors understand the -Werror option. For example, you can put a #warning directive in any preprocessed code. warning: #warning "this is a warning message" [-Wcpp] If -Werror is added, it is promoted to an error. error: #warning "this is a warning message" [-Werror=cpp] This commit moves -Werror to KBUILD_CPPFLAGS so it works in the same way for *.c, *.S, *.lds.S or whatever needs preprocessing. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index fbd9ff4a61e7..6b047daa46cc 100644
--- a/Makefile
+++ b/Makefile
@@ -866,7 +866,8 @@ stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong
KBUILD_CFLAGS += $(stackp-flags-y)
-KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
+KBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror
+KBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y)
KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings