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linux-yocto/arch/loongarch/Makefile
Linus Torvalds 8afc66e8d4 Kbuild updates for v6.1 
- Remove potentially incomplete targets when Kbuid is interrupted by
    SIGINT etc. in case GNU Make may miss to do that when stderr is piped
    to another program.
 
  - Rewrite the single target build so it works more correctly.
 
  - Fix rpm-pkg builds with V=1.
 
  - List top-level subdirectories in ./Kbuild.
 
  - Ignore auto-generated __kstrtab_* and __kstrtabns_* symbols in kallsyms.
 
  - Avoid two different modules in lib/zstd/ having shared code, which
    potentially causes building the common code as build-in and modular
    back-and-forth.
 
  - Unify two modpost invocations to optimize the build process.
 
  - Remove head-y syntax in favor of linker scripts for placing particular
    sections in the head of vmlinux.
 
  - Bump the minimal GNU Make version to 3.82.
 
  - Clean up misc Makefiles and scripts.
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Merge tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Remove potentially incomplete targets when Kbuid is interrupted by
   SIGINT etc in case GNU Make may miss to do that when stderr is piped
   to another program.

 - Rewrite the single target build so it works more correctly.

 - Fix rpm-pkg builds with V=1.

 - List top-level subdirectories in ./Kbuild.

 - Ignore auto-generated __kstrtab_* and __kstrtabns_* symbols in
   kallsyms.

 - Avoid two different modules in lib/zstd/ having shared code, which
   potentially causes building the common code as build-in and modular
   back-and-forth.

 - Unify two modpost invocations to optimize the build process.

 - Remove head-y syntax in favor of linker scripts for placing
   particular sections in the head of vmlinux.

 - Bump the minimal GNU Make version to 3.82.

 - Clean up misc Makefiles and scripts.

* tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (41 commits)
  docs: bump minimal GNU Make version to 3.82
  ia64: simplify esi object addition in Makefile
  Revert "kbuild: Check if linker supports the -X option"
  kbuild: rebuild .vmlinux.export.o when its prerequisite is updated
  kbuild: move modules.builtin(.modinfo) rules to Makefile.vmlinux_o
  zstd: Fixing mixed module-builtin objects
  kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols
  kallsyms: take the input file instead of reading stdin
  kallsyms: drop duplicated ignore patterns from kallsyms.c
  kbuild: reuse mksysmap output for kallsyms
  mksysmap: update comment about __crc_*
  kbuild: remove head-y syntax
  kbuild: use obj-y instead extra-y for objects placed at the head
  kbuild: hide error checker logs for V=1 builds
  kbuild: re-run modpost when it is updated
  kbuild: unify two modpost invocations
  kbuild: move vmlinux.o rule to the top Makefile
  kbuild: move .vmlinux.objs rule to Makefile.modpost
  kbuild: list sub-directories in ./Kbuild
  Makefile.compiler: replace cc-ifversion with compiler-specific macros
  ...
2022-10-10 12:00:45 -07:00

3.1 KiB
Raw Blame History

SPDX-License-Identifier: GPL-2.0

Author: Huacai Chen chenhuacai@loongson.cn

Copyright (C) 2020-2022 Loongson Technology Corporation Limited

boot := arch/loongarch/boot

KBUILD_DEFCONFIG := loongson3_defconfig

image-name-y := vmlinux image-name-$(CONFIG_EFI_ZBOOT) := vmlinuz

ifndef CONFIG_EFI_STUB KBUILD_IMAGE := $(boot)/vmlinux.elf else KBUILD_IMAGE := $(boot)/$(image-name-y).efi endif

Select the object file format to substitute into the linker script.

64bit-tool-archpref = loongarch64 32bit-bfd = elf32-loongarch 64bit-bfd = elf64-loongarch 32bit-emul = elf32loongarch 64bit-emul = elf64loongarch

ifdef CONFIG_64BIT tool-archpref = $(64bit-tool-archpref) UTS_MACHINE := loongarch64 endif

ifneq ($(SUBARCH),$(ARCH)) ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-) endif endif

ifdef CONFIG_64BIT ld-emul = $(64bit-emul) cflags-y += -mabi=lp64s endif

cflags-y += -G0 -pipe -msoft-float LDFLAGS_vmlinux += -G0 -static -n -nostdlib KBUILD_AFLAGS_KERNEL += -Wa,-mla-global-with-pcrel KBUILD_CFLAGS_KERNEL += -Wa,-mla-global-with-pcrel KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs

cflags-y += -ffreestanding cflags-y += $(call cc-option, -mno-check-zero-division)

load-y = 0x9000000000200000 bootvars-y = VMLINUX_LOAD_ADDRESS=$(load-y)

drivers-$(CONFIG_PCI) += arch/loongarch/pci/

KBUILD_AFLAGS += $(cflags-y) KBUILD_CFLAGS += $(cflags-y) KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)

This is required to get dwarf unwinding tables into .debug_frame

instead of .eh_frame so we don't discard them.

KBUILD_CFLAGS += -fno-asynchronous-unwind-tables

Don't emit unaligned accesses.

Not all LoongArch cores support unaligned access, and as kernel we can't

rely on others to provide emulation for these accesses.

KBUILD_CFLAGS += $(call cc-option,-mstrict-align)

KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include)

KBUILD_LDFLAGS += -m $(ld-emul)

ifdef CONFIG_LOONGARCH CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null |
egrep -vw 'GNUC(MINOR|PATCHLEVEL_)?_' |
sed -e "s/^#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/$$/&&/g') endif

libs-y += arch/loongarch/lib/ libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a

ifeq ($(KBUILD_EXTMOD),) prepare: vdso_prepare vdso_prepare: prepare0 $(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h endif

PHONY += vdso_install vdso_install: $(Q)$(MAKE) $(build)=arch/loongarch/vdso $@

all: $(notdir $(KBUILD_IMAGE))

vmlinux.elf vmlinux.efi vmlinuz.efi: vmlinux $(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $(boot)/$@

install: $(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/$(image-name-y)-$(KERNELRELEASE) $(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE) $(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)

define archhelp echo ' install - install kernel into $(INSTALL_PATH)' echo endef