mirror of
https://github.com/torvalds/linux.git
synced 2026-04-18 06:44:00 -04:00
ec4c28276c
Introduce CC_FLAGS_DIALECT to make it easier to update the various places in the tree that rely on the GNU C standard and Microsoft extensions flags atomically. All remaining uses of '-std=gnu11' and '-fms-extensions' are in the tools directory (which has its own build system) and other standalone Makefiles. This will allow the kernel to use a narrower option to enable the Microsoft anonymous tagged structure extension in a simpler manner. Place the CC_FLAGS_DIALECT block after the configuration include (so that a future change can move the selection of the flag to Kconfig) but before the arch/$(SRCARCH)/Makefile include (so that CC_FLAGS_DIALECT is available for use in those Makefiles). Signed-off-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Nicolas Schier <nsc@kernel.org> Acked-by: Ard Biesheuvel <ardb@kernel.org> Acked-by: Helge Deller <deller@gmx.de> # parisc Link: https://patch.msgid.link/20260223-fms-anonymous-structs-v1-1-8ee406d3c36c@kernel.org Signed-off-by: Nicolas Schier <nsc@kernel.org>
50 lines
1.9 KiB
Makefile
50 lines
1.9 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
purgatory-y := head.o purgatory.o string.o sha256.o mem.o
|
|
|
|
targets += $(purgatory-y) purgatory.lds purgatory purgatory.chk purgatory.ro
|
|
PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
|
|
|
|
$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE
|
|
$(call if_changed_rule,cc_o_c)
|
|
|
|
CFLAGS_sha256.o := -D__NO_FORTIFY
|
|
|
|
$(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S FORCE
|
|
$(call if_changed_rule,as_o_S)
|
|
|
|
KBUILD_CFLAGS := $(CC_FLAGS_DIALECT) -fno-strict-aliasing -Wall -Wstrict-prototypes
|
|
KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare
|
|
KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding
|
|
KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common
|
|
KBUILD_CFLAGS += -fno-stack-protector
|
|
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
|
|
KBUILD_CFLAGS += -D__DISABLE_EXPORTS
|
|
KBUILD_CFLAGS += $(CLANG_FLAGS)
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
|
|
KBUILD_CFLAGS += $(call cc-option, -Wno-default-const-init-unsafe)
|
|
KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS))
|
|
KBUILD_AFLAGS += -D__DISABLE_EXPORTS
|
|
|
|
# Since we link purgatory with -r unresolved symbols are not checked, so we
|
|
# also link a purgatory.chk binary without -r to check for unresolved symbols.
|
|
PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib
|
|
LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T
|
|
LDFLAGS_purgatory.chk := -e purgatory_start $(PURGATORY_LDFLAGS)
|
|
$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE
|
|
$(call if_changed,ld)
|
|
|
|
$(obj)/purgatory.chk: $(obj)/purgatory FORCE
|
|
$(call if_changed,ld)
|
|
|
|
OBJCOPYFLAGS_purgatory.ro := -O elf64-s390
|
|
OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*'
|
|
OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment'
|
|
OBJCOPYFLAGS_purgatory.ro += --remove-section='.note.*'
|
|
$(obj)/purgatory.ro: $(obj)/purgatory $(obj)/purgatory.chk FORCE
|
|
$(call if_changed,objcopy)
|
|
|
|
$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro
|
|
|
|
obj-y += kexec-purgatory.o
|