linux-next/arch/csky
Masahiro Yamada 3216484550 kbuild: use obj-y instead extra-y for objects placed at the head
The objects placed at the head of vmlinux need special treatments:

 - arch/$(SRCARCH)/Makefile adds them to head-y in order to place
   them before other archives in the linker command line.

 - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of
   obj-y to avoid them going into built-in.a.

This commit gets rid of the latter.

Create vmlinux.a to collect all the objects that are unconditionally
linked to vmlinux. The objects listed in head-y are moved to the head
of vmlinux.a by using 'ar m'.

With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-y
for builtin objects.

There is no *.o that is directly linked to vmlinux. Drop unneeded code
in scripts/clang-tools/gen_compile_commands.py.

$(AR) mPi needs 'T' to workaround the llvm-ar bug. The fix was suggested
by Nathan Chancellor [1].

[1]: https://lore.kernel.org/llvm/YyjjT5gQ2hGMH0ni@dev-arch.thelio-3990X/

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2022-10-02 18:04:05 +09:00
..
abiv1 csky: abiv1: Fixup compile error 2022-07-31 22:39:23 -04:00
abiv2 csky: Add C based string functions 2022-04-18 21:23:55 +08:00
boot csky: Remove unused $(dtb-y) from boot/Makefile 2022-05-13 14:45:09 +08:00
configs csky: Minimize defconfig to support buildroot config.fragment 2020-02-21 15:43:25 +08:00
include - The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe 2022-08-05 16:32:45 -07:00
kernel kbuild: use obj-y instead extra-y for objects placed at the head 2022-10-02 18:04:05 +09:00
lib csky: Add C based string functions 2022-04-18 21:23:55 +08:00
mm - The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe 2022-08-05 16:32:45 -07:00
Kbuild csky: Move $(core-y) into arch/csky/Kbuild 2022-05-13 15:09:28 +08:00
Kconfig arch/csky patches for 6.0-rc1 2022-08-04 15:27:20 -07:00
Kconfig.debug treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.platforms csky/Kconfig: Add Kconfig.platforms to support some drivers 2020-02-21 15:43:24 +08:00
Makefile csky: Move $(core-y) into arch/csky/Kbuild 2022-05-13 15:09:28 +08:00