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authorSodagudi Prasad <psodagud@codeaurora.org>2018-02-06 15:46:51 -0800
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-02-07 09:20:19 +0900
commit0a5f41767444cc3b4fc5573921ab914b4f78baaa (patch)
tree626bf979c52f950d3ca284c4980fa1197f89f780 /Makefile
parent1b9eda2e4892cb373c7d4cf23439f357c8739e27 (diff)
downloadlinux-0a5f41767444cc3b4fc5573921ab914b4f78baaa.tar.bz2
kbuild: clang: disable unused variable warnings only when constant
Currently, GCC disables -Wunused-const-variable, but not -Wunused-variable, so warns unused variables if they are non-constant. While, Clang does not warn unused variables at all regardless of the const qualifier because -Wno-unused-const-variable is implied by the stronger option -Wno-unused-variable. Disable -Wunused-const-variable instead of -Wunused-variable so that GCC and Clang work in the same way. Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile3
1 files changed, 1 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 11aff0f9e105..ca0a57198ca6 100644
--- a/Makefile
+++ b/Makefile
@@ -700,7 +700,6 @@ KBUILD_CFLAGS += $(stackp-flag)
ifeq ($(cc-name),clang)
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
-KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
@@ -718,9 +717,9 @@ else
# These warnings generated too much noise in a regular build.
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
-KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
endif
+KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
ifdef CONFIG_FRAME_POINTER
KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
else