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| author | Nathan Chancellor <nathan@kernel.org> | 2023-01-24 17:19:28 +0100 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2023-02-05 10:51:22 +0100 |
| commit | 4e3feaad6ff8a7a57e3bf3308a93c93e3a2e17a6 (patch) | |
| tree | 9187e93ab8dc533495f1c3011b74bd36da7d7b80 /arch/powerpc | |
| parent | kbuild: deb-pkg: add --source-option=-sP (diff) | |
| download | linux-4e3feaad6ff8a7a57e3bf3308a93c93e3a2e17a6.tar.xz linux-4e3feaad6ff8a7a57e3bf3308a93c93e3a2e17a6.zip | |
powerpc/vdso: Filter clang's auto var init zero enabler when linking
After commit 8d9acfce3332 ("kbuild: Stop using '-Qunused-arguments' with
clang"), the PowerPC vDSO shows the following error with clang-13 and
older when CONFIG_INIT_STACK_ALL_ZERO is enabled:
clang: error: argument unused during compilation: '-enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang' [-Werror,-Wunused-command-line-argument]
clang-14 added a change to make sure this flag never triggers
-Wunused-command-line-argument, so it is fixed with newer releases. For
older releases that the kernel still supports building with, just filter
out this flag, as has been done for other flags.
Fixes: f0a42fbab447 ("powerpc/vdso: Improve linker flags")
Fixes: 8d9acfce3332 ("kbuild: Stop using '-Qunused-arguments' with clang")
Link: https://github.com/llvm/llvm-project/commit/ca6d5813d17598cd180995fb3bdfca00f364475f
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/vdso/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/vdso/Makefile b/arch/powerpc/kernel/vdso/Makefile index 7e69e87fbf74..d2a1dc0956d5 100644 --- a/arch/powerpc/kernel/vdso/Makefile +++ b/arch/powerpc/kernel/vdso/Makefile @@ -56,7 +56,7 @@ ccflags-y := -fno-common -fno-builtin ldflags-y := -Wl,--hash-style=both -nostdlib -shared -z noexecstack ldflags-$(CONFIG_LD_IS_LLD) += $(call cc-option,--ld-path=$(LD),-fuse-ld=lld) # Filter flags that clang will warn are unused for linking -ldflags-y += $(filter-out $(CC_FLAGS_FTRACE) -Wa$(comma)%, $(KBUILD_CFLAGS)) +ldflags-y += $(filter-out $(CC_AUTO_VAR_INIT_ZERO_ENABLER) $(CC_FLAGS_FTRACE) -Wa$(comma)%, $(KBUILD_CFLAGS)) CC32FLAGS := -m32 LD32FLAGS := -Wl,-soname=linux-vdso32.so.1 |