mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 21:24:00 +08:00
15d5761ad3
CFLAGS_REMOVE_<file>.o filters out flags when compiling a particular
object, but there is no convenient way to do that for every object in
a directory.
Add ccflags-remove-y and asflags-remove-y to make it easily.
Use ccflags-remove-y to clean up some Makefiles.
The add/remove order works as follows:
[1] KBUILD_CFLAGS specifies compiler flags used globally
[2] ccflags-y adds compiler flags for all objects in the
current Makefile
[3] ccflags-remove-y removes compiler flags for all objects in the
current Makefile (New feature)
[4] CFLAGS_<file> adds compiler flags per file.
[5] CFLAGS_REMOVE_<file> removes compiler flags per file.
Having [3] before [4] allows us to remove flags from most (but not all)
objects in the current Makefile.
For example, kernel/trace/Makefile removes $(CC_FLAGS_FTRACE)
from all objects in the directory, then adds it back to
trace_selftest_dynamic.o and CFLAGS_trace_kprobe_selftest.o
The same applies to lib/livepatch/Makefile.
Please note ccflags-remove-y has no effect to the sub-directories.
In contrast, the previous notation got rid of compiler flags also from
all the sub-directories.
The following are not affected because they have no sub-directories:
arch/arm/boot/compressed/
arch/powerpc/xmon/
arch/sh/
kernel/trace/
However, lib/ has several sub-directories.
To keep the behavior, I added ccflags-remove-y to all Makefiles
in subdirectories of lib/, except the following:
lib/vdso/Makefile - Kbuild does not descend into this Makefile
lib/raid/test/Makefile - This is not used for the kernel build
I think commit 2464a609de ("ftrace: do not trace library functions")
excluded too much. In the next commit, I will remove ccflags-remove-y
from the sub-directories of lib/.
Suggested-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Acked-by: Brendan Higgins <brendanhiggins@google.com> (KUnit)
Tested-by: Anders Roxell <anders.roxell@linaro.org>
75 lines
2.1 KiB
Makefile
75 lines
2.1 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
#
|
|
# linux/arch/sh/boot/compressed/Makefile
|
|
#
|
|
# 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 = $(obj)/head_32.o $(obj)/misc.o $(obj)/cache.o
|
|
|
|
GCOV_PROFILE := n
|
|
|
|
#
|
|
# IMAGE_OFFSET is the load offset of the compression loader
|
|
#
|
|
ifeq ($(CONFIG_32BIT),y)
|
|
IMAGE_OFFSET := $(shell /bin/bash -c 'printf "0x%08x" \
|
|
$$[$(CONFIG_MEMORY_START) + \
|
|
$(CONFIG_BOOT_LINK_OFFSET)]')
|
|
else
|
|
IMAGE_OFFSET := $(shell /bin/bash -c 'printf "0x%08x" \
|
|
$$[$(CONFIG_PAGE_OFFSET) + \
|
|
$(KERNEL_MEMORY) + \
|
|
$(CONFIG_BOOT_LINK_OFFSET)]')
|
|
endif
|
|
|
|
ccflags-remove-$(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))))
|
|
|
|
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
|
|
$(call if_changed,ld)
|
|
|
|
$(obj)/vmlinux.bin: vmlinux FORCE
|
|
$(call if_changed,objcopy)
|
|
|
|
vmlinux.bin.all-y := $(obj)/vmlinux.bin
|
|
|
|
$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
|
|
$(call if_changed,gzip)
|
|
$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
|
|
$(call if_changed,bzip2)
|
|
$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
|
|
$(call if_changed,lzma)
|
|
$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
|
|
$(call if_changed,xzkern)
|
|
$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
|
|
$(call if_changed,lzo)
|
|
|
|
OBJCOPYFLAGS += -R .empty_zero_page
|
|
|
|
LDFLAGS_piggy.o := -r --format binary --oformat $(ld-bfd) -T
|
|
|
|
$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y) FORCE
|
|
$(call if_changed,ld)
|