Commit ce99d0bf authored Mar 16, 2018 by Masahiro Yamada

kbuild: clear LDFLAGS in the top Makefile



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>

parent bd0f98eb

Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -435,6 +435,7 @@ KBUILD_CFLAGS_KERNEL :=
		KBUILD_AFLAGS_MODULE := -DMODULE
		KBUILD_CFLAGS_MODULE := -DMODULE
		KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
		LDFLAGS :=
		GCC_PLUGINS_CFLAGS :=

		export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC