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sh: boot: avoid unneeded rebuilds under arch/sh/boot/compressed/

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Even if none of source code is updated, the following are every time
rebuilt:

  CC      arch/sh/boot/compressed/cache.o
  SHIPPED arch/sh/boot/compressed/ashiftrt.S
  AS      arch/sh/boot/compressed/ashiftrt.o
  SHIPPED arch/sh/boot/compressed/ashldi3.c
  CC      arch/sh/boot/compressed/ashldi3.o
  SHIPPED arch/sh/boot/compressed/ashrsi3.S
  AS      arch/sh/boot/compressed/ashrsi3.o
  SHIPPED arch/sh/boot/compressed/ashlsi3.S
  AS      arch/sh/boot/compressed/ashlsi3.o
  SHIPPED arch/sh/boot/compressed/lshrsi3.S
  AS      arch/sh/boot/compressed/lshrsi3.o
  LD      arch/sh/boot/compressed/vmlinux
  OBJCOPY arch/sh/boot/zImage

Add build artifacts to 'targets' as needed.

I turned the library files to check-in files. It is simpler than
copying from arch/sh/lib/ at build-time.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Rich Felker <dalias@libc.org>
This commit is contained in:
Masahiro Yamada 2021-01-17 20:16:32 +09:00 committed by Rich Felker
parent 7b6ef6e570
commit 7fe859eef9
7 changed files with 23 additions and 24 deletions
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5
arch/sh/boot/compressed/.gitignore vendored
View file

@ -1,7 +1,2 @@
# SPDX-License-Identifier: GPL-2.0-only
ashiftrt.S
ashldi3.c
ashlsi3.S
ashrsi3.S
lshrsi3.S
vmlinux.bin.*

32
arch/sh/boot/compressed/Makefile
View file

@ -5,12 +5,18 @@
# create a compressed vmlinux image from the original vmlinux
#
targets := vmlinux vmlinux.bin vmlinux.bin.gz \
vmlinux.bin.bz2 vmlinux.bin.lzma \
vmlinux.bin.xz vmlinux.bin.lzo \
head_32.o misc.o piggy.o
OBJECTS := head_32.o misc.o cache.o piggy.o \
ashiftrt.o ashldi3.o ashrsi3.o ashlsi3.o lshrsi3.o
OBJECTS = $(obj)/head_32.o $(obj)/misc.o $(obj)/cache.o
# These were previously generated files. When you are building the kernel
# with O=, make sure to remove the stale files in the output tree. Otherwise,
# the build system wrongly compiles the stale ones.
ifdef building_out_of_srctree
$(shell rm -f $(addprefix $(obj)/, ashiftrt.S ashldi3.c ashrsi3.S ashlsi3.S lshrsi3.S))
endif
targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 \
vmlinux.bin.lzma vmlinux.bin.xz vmlinux.bin.lzo $(OBJECTS)
GCOV_PROFILE := n
@ -33,21 +39,9 @@ ccflags-remove-$(CONFIG_MCOUNT) += -pg
LDFLAGS_vmlinux := --oformat $(ld-bfd) -Ttext $(IMAGE_OFFSET) -e startup \
-T $(obj)/../../kernel/vmlinux.lds
#
# Pull in the necessary libgcc bits from the in-kernel implementation.
#
lib1funcs-y := ashiftrt.S ashldi3.c ashrsi3.S ashlsi3.S lshrsi3.S
lib1funcs-obj := \
$(addsuffix .o, $(basename $(addprefix $(obj)/, $(lib1funcs-y))))
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
lib1funcs-dir := $(srctree)/arch/$(SRCARCH)/lib
KBUILD_CFLAGS += -I$(lib1funcs-dir) -DDISABLE_BRANCH_PROFILING
$(addprefix $(obj)/,$(lib1funcs-y)): $(obj)/%: $(lib1funcs-dir)/% FORCE
$(call cmd,shipped)
$(obj)/vmlinux: $(OBJECTS) $(obj)/piggy.o $(lib1funcs-obj) FORCE
$(obj)/vmlinux: $(addprefix $(obj)/, $(OBJECTS)) FORCE
$(call if_changed,ld)
$(obj)/vmlinux.bin: vmlinux FORCE

2
arch/sh/boot/compressed/ashiftrt.S Normal file
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@ -0,0 +1,2 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include "../../lib/ashiftrt.S"

2
arch/sh/boot/compressed/ashldi3.c Normal file
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@ -0,0 +1,2 @@
// SPDX-License-Identifier: GPL-2.0-only
#include "../../lib/ashldi3.c"

2
arch/sh/boot/compressed/ashlsi3.S Normal file
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@ -0,0 +1,2 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include "../../lib/ashlsi3.S"

2
arch/sh/boot/compressed/ashrsi3.S Normal file
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@ -0,0 +1,2 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include "../../lib/ashrsi3.S"

2
arch/sh/boot/compressed/lshrsi3.S Normal file
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@ -0,0 +1,2 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#include "../../lib/lshrsi3.S"