5d0d362330
Kbuild changes
==============
* tools/build: Reject unexpected values for LLVM=
* kbuild: uapi: remove usage of toolchain headers
* kbuild: Switch from '-fms-extensions' to '-fms-anonymous-structs'
when available (currently: clang >= 23.0.0)
* kbuild: Reduce the number of compiler-generated suffixes for clang
thin-lto build
* kbuild: reduce output spam ("GEN Makefile") when building out of tree
* check-uapi: improve portability for testing headers
* uapi: also test UAPI headers against C++ compilers
* kbuild: vdso_install: drop build ID architecture allow-list
* checksyscalls: only run when necessary
* Documentation: kbuild: Update the debug information notes in
reproducible-builds.rst
* kconfig: forbid multiple entries with the same symbol in a choice
* kbuild: expand inlining hints with -fdiagnostics-show-inlining-chain
Kconfig changes
===============
* kconfig: Error out on duplicated kconfig inclusion
Cc: Alexander Coffin <alex@cyberialabs.net>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bill Wendling <morbo@google.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Dodji Seketeli <dodji@seketeli.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Helge Deller <deller@gmx.de>
Cc: John Moon <john@jmoon.dev>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: Shuah Khan <skhan@linuxfoundation.org>
Cc: Song Liu <song@kernel.org>
Cc: Thomas Weißschuh <linux@weissschuh.net>
Cc: Yonghong Song <yonghong.song@linux.dev>
Cc: kernel-team@fb.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-efi@vger.kernel.org
Cc: linux-hexagon@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-parisc@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: llvm@lists.linux.dev
Cc: loongarch@lists.linux.dev
-----BEGIN PGP SIGNATURE-----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=+wTC
-----END PGP SIGNATURE-----
Merge tag 'kbuild-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux
Pull Kbuild/Kconfig updates from Nicolas Schier:
"Kbuild:
- reject unexpected values for LLVM=
- uapi: remove usage of toolchain headers
- switch from '-fms-extensions' to '-fms-anonymous-structs' when
available (currently: clang >= 23.0.0)
- reduce the number of compiler-generated suffixes for clang thin-lto
build
- reduce output spam ("GEN Makefile") when building out of tree
- improve portability for testing headers
- also test UAPI headers against C++ compilers
- drop build ID architecture allow-list in vdso_install
- only run checksyscalls when necessary
- update the debug information notes in reproducible-builds.rst
- expand inlining hints with -fdiagnostics-show-inlining-chain
Kconfig:
- forbid multiple entries with the same symbol in a choice
- error out on duplicated kconfig inclusion"
* tag 'kbuild-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux: (35 commits)
kbuild: expand inlining hints with -fdiagnostics-show-inlining-chain
kconfig: forbid multiple entries with the same symbol in a choice
Documentation: kbuild: Update the debug information notes in reproducible-builds.rst
checksyscalls: move instance functionality into generic code
checksyscalls: only run when necessary
checksyscalls: fail on all intermediate errors
checksyscalls: move path to reference table to a variable
kbuild: vdso_install: drop build ID architecture allow-list
kbuild: vdso_install: gracefully handle images without build ID
kbuild: vdso_install: hide readelf warnings
kbuild: vdso_install: split out the readelf invocation
kbuild: uapi: also test UAPI headers against C++ compilers
kbuild: uapi: provide a C++ compatible dummy definition of NULL
kbuild: uapi: handle UML in architecture-specific exclusion lists
kbuild: uapi: move all include path flags together
kbuild: uapi: move some compiler arguments out of the command definition
check-uapi: use dummy libc includes
check-uapi: honor ${CROSS_COMPILE} setting
check-uapi: link into shared objects
kbuild: reduce output spam when building out of tree
...
89 lines
2.5 KiB
Makefile
89 lines
2.5 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
# Objects to go into the VDSO.
|
|
|
|
# Include the generic Makefile to check the built vdso.
|
|
include $(srctree)/lib/vdso/Makefile.include
|
|
|
|
obj-vdso-y := elf.o vgetcpu.o vgetrandom.o \
|
|
vgetrandom-chacha.o sigreturn.o
|
|
obj-vdso-$(CONFIG_GENERIC_GETTIMEOFDAY) += vgettimeofday.o
|
|
|
|
# Common compiler flags between ABIs.
|
|
ccflags-vdso := \
|
|
$(filter -I%,$(KBUILD_CFLAGS)) \
|
|
$(filter -E%,$(KBUILD_CFLAGS)) \
|
|
$(filter -march=%,$(KBUILD_CFLAGS)) \
|
|
$(filter -m%-float,$(KBUILD_CFLAGS)) \
|
|
$(CLANG_FLAGS) \
|
|
-D__VDSO__
|
|
|
|
ifdef CONFIG_32BIT
|
|
ccflags-vdso += -DBUILD_VDSO32
|
|
endif
|
|
|
|
cflags-vdso := $(ccflags-vdso) \
|
|
-isystem $(shell $(CC) -print-file-name=include) \
|
|
$(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \
|
|
$(CC_FLAGS_DIALECT) -O2 -g -fno-strict-aliasing -fno-common -fno-builtin \
|
|
-fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \
|
|
$(call cc-option, -fasynchronous-unwind-tables) \
|
|
$(call cc-option, -fno-stack-protector)
|
|
aflags-vdso := $(ccflags-vdso) \
|
|
-D__ASSEMBLY__ -Wa,-gdwarf-2
|
|
|
|
ifneq ($(c-gettimeofday-y),)
|
|
CFLAGS_vgettimeofday.o += -include $(c-gettimeofday-y)
|
|
endif
|
|
|
|
ifneq ($(c-getrandom-y),)
|
|
CFLAGS_vgetrandom.o += -include $(c-getrandom-y)
|
|
endif
|
|
|
|
# VDSO linker flags.
|
|
ldflags-y := -Bsymbolic --no-undefined -soname=linux-vdso.so.1 \
|
|
$(filter -E%,$(KBUILD_CFLAGS)) -shared --build-id --eh-frame-hdr -T
|
|
|
|
#
|
|
# Shared build commands.
|
|
#
|
|
|
|
quiet_cmd_vdsold_and_vdso_check = LD $@
|
|
cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check)
|
|
|
|
quiet_cmd_vdsoas_o_S = AS $@
|
|
cmd_vdsoas_o_S = $(CC) $(a_flags) -c -o $@ $<
|
|
|
|
# Generate VDSO offsets using helper script
|
|
gen-vdsosym := $(src)/gen_vdso_offsets.sh
|
|
quiet_cmd_vdsosym = VDSOSYM $@
|
|
cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
|
|
|
|
include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
|
|
$(call if_changed,vdsosym)
|
|
|
|
#
|
|
# Build native VDSO.
|
|
#
|
|
|
|
native-abi := $(filter -mabi=%,$(KBUILD_CFLAGS))
|
|
|
|
targets += $(obj-vdso-y)
|
|
targets += vdso.lds vdso.so.dbg vdso.so
|
|
|
|
obj-vdso := $(obj-vdso-y:%.o=$(obj)/%.o)
|
|
|
|
$(obj-vdso): KBUILD_CFLAGS := $(cflags-vdso) $(native-abi)
|
|
$(obj-vdso): KBUILD_AFLAGS := $(aflags-vdso) $(native-abi)
|
|
|
|
$(obj)/vdso.lds: KBUILD_CPPFLAGS := $(ccflags-vdso) $(native-abi)
|
|
|
|
$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE
|
|
$(call if_changed,vdsold_and_vdso_check)
|
|
|
|
$(obj)/vdso.so: OBJCOPYFLAGS := -S
|
|
$(obj)/vdso.so: $(obj)/vdso.so.dbg FORCE
|
|
$(call if_changed,objcopy)
|
|
|
|
obj-y += vdso.o
|
|
|
|
$(obj)/vdso.o : $(obj)/vdso.so
|