mirros/rockchip-kernel
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

kbuild: use obj-y instead extra-y for objects placed at the head

Browse Source 
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>
This commit is contained in:
Masahiro Yamada
2022-09-25 03:19:14 +09:00
parent 4b09865900
commit 3216484550
29 changed files with 91 additions and 113 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/m68k/68000/Makefile
View File

@@ -17,4 +17,4 @@ obj-$(CONFIG_DRAGEN2) += dragen2.o
obj-$(CONFIG_UCSIMM) += ucsimm.o
obj-$(CONFIG_UCDIMM) += ucsimm.o
extra-y := head.o
obj-y += head.o

2
arch/m68k/coldfire/Makefile
View File

@@ -45,4 +45,4 @@ obj-$(CONFIG_STMARK2) += stmark2.o
obj-$(CONFIG_PCI) += pci.o
obj-y += gpio.o
extra-y := head.o
obj-y += head.o

23
arch/m68k/kernel/Makefile
View File

@@ -3,19 +3,20 @@
# Makefile for the linux kernel.
#
extra-$(CONFIG_AMIGA) := head.o
extra-$(CONFIG_ATARI) := head.o
extra-$(CONFIG_MAC) := head.o
extra-$(CONFIG_APOLLO) := head.o
extra-$(CONFIG_VME) := head.o
extra-$(CONFIG_HP300) := head.o
extra-$(CONFIG_Q40) := head.o
extra-$(CONFIG_SUN3X) := head.o
extra-$(CONFIG_VIRT) := head.o
extra-$(CONFIG_SUN3) := sun3-head.o
extra-y += vmlinux.lds
obj-y := entry.o irq.o module.o process.o ptrace.o
obj-$(CONFIG_AMIGA) := head.o
obj-$(CONFIG_ATARI) := head.o
obj-$(CONFIG_MAC) := head.o
obj-$(CONFIG_APOLLO) := head.o
obj-$(CONFIG_VME) := head.o
obj-$(CONFIG_HP300) := head.o
obj-$(CONFIG_Q40) := head.o
obj-$(CONFIG_SUN3X) := head.o
obj-$(CONFIG_VIRT) := head.o
obj-$(CONFIG_SUN3) := sun3-head.o
obj-y += entry.o irq.o module.o process.o ptrace.o
obj-y += setup.o signal.o sys_m68k.o syscalltable.o time.o traps.o
obj-$(CONFIG_MMU_MOTOROLA) += ints.o vectors.o