| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 086/101] kbuild: clear LDFLAGS in the top Makefile | Date | Tue, 23 Aug 2022 10:03:59 +0200 |
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From: Masahiro Yamada <yamada.masahiro@socionext.com>
commit ce99d0bf312daf0178e640da9e3c93b773a67e7d upstream.
Currently LDFLAGS is not cleared, so same flags are accumulated in LDFLAGS when the top Makefile is recursively invoked.
I found unneeded rebuild for ARCH=arm64 when CONFIG_TRIM_UNUSED_KSYMS is enabled. If include/generated/autoksyms.h is updated, the top Makefile is recursively invoked, then arch/arm64/Makefile adds one more '-maarch64linux'. Due to the command line change, modules are rebuilt needlessly.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- Makefile | 1 + 1 file changed, 1 insertion(+)
--- a/Makefile +++ b/Makefile @@ -395,6 +395,7 @@ KBUILD_CFLAGS_KERNEL := KBUILD_AFLAGS_MODULE := -DMODULE KBUILD_CFLAGS_MODULE := -DMODULE KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds +LDFLAGS := GCC_PLUGINS_CFLAGS := CLANG_FLAGS :=
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