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| author | Sodagudi Prasad <psodagud@codeaurora.org> | 2018-02-06 15:46:51 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-05 11:41:57 +0200 |
| commit | 96b086a7bfe575c3626cf2a9af301539c2623b9b (patch) | |
| tree | b17661205053c7fcff6035b159bb94dec23385d8 | |
| parent | 9b6eda5797b182ab6460c25ec9a186a7fbf92a52 (diff) | |
| download | linux-stable-96b086a7bfe575c3626cf2a9af301539c2623b9b.tar.gz linux-stable-96b086a7bfe575c3626cf2a9af301539c2623b9b.tar.bz2 linux-stable-96b086a7bfe575c3626cf2a9af301539c2623b9b.zip | |
kbuild: clang: disable unused variable warnings only when constant
commit 0a5f41767444cc3b4fc5573921ab914b4f78baaa upstream.
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>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Makefile | 3 |
1 files changed, 1 insertions, 2 deletions
@@ -706,7 +706,6 @@ 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) @@ -724,9 +723,9 @@ 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 |