Kbuild fixes for v5.12 (2nd)

- avoid 'make image_name' invoking syncconfig
 
  - fix a couple of bugs in scripts/dummy-tools.
 
  - fix LLD_VENDOR and locale issues in scripts/ld-version.sh
 
  - rebuild GCC plugins when the compiler is upgraded
 
  - allow LTO to be enabled with KASAN_HW_TAGS
 
  - allow LTO to be enabled without LLVM=1
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Merge tag 'kbuild-fixes-v5.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - avoid 'make image_name' invoking syncconfig

 - fix a couple of bugs in scripts/dummy-tools

 - fix LLD_VENDOR and locale issues in scripts/ld-version.sh

 - rebuild GCC plugins when the compiler is upgraded

 - allow LTO to be enabled with KASAN_HW_TAGS

 - allow LTO to be enabled without LLVM=1

* tag 'kbuild-fixes-v5.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: fix ld-version.sh to not be affected by locale
  kbuild: remove meaningless parameter to $(call if_changed_rule,dtc)
  kbuild: remove LLVM=1 test from HAS_LTO_CLANG
  kbuild: remove unneeded -O option to dtc
  kbuild: dummy-tools: adjust to scripts/cc-version.sh
  kbuild: Allow LTO to be selected with KASAN_HW_TAGS
  kbuild: dummy-tools: support MPROFILE_KERNEL checks for ppc
  kbuild: rebuild GCC plugins when the compiler is upgraded
  kbuild: Fix ld-version.sh script if LLD was built with LLD_VENDOR
  kbuild: dummy-tools: fix inverted tests for gcc
  kbuild: add image_name to no-sync-config-targets
This commit is contained in:
Linus Torvalds 2021-03-13 12:18:59 -08:00
commit e83bad7f77
9 changed files with 55 additions and 21 deletions

View File

@ -264,7 +264,8 @@ no-dot-config-targets := $(clean-targets) \
$(version_h) headers headers_% archheaders archscripts \
%asm-generic kernelversion %src-pkg dt_binding_check \
outputmakefile
no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease
no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \
image_name
single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
config-build :=
@ -478,6 +479,7 @@ USERINCLUDE := \
-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \
-I$(srctree)/include/uapi \
-I$(objtree)/include/generated/uapi \
-include $(srctree)/include/linux/compiler-version.h \
-include $(srctree)/include/linux/kconfig.h
# Use LINUXINCLUDE when you must reference the include/ directory.

View File

@ -632,13 +632,12 @@ config HAS_LTO_CLANG
def_bool y
# Clang >= 11: https://github.com/ClangBuiltLinux/linux/issues/510
depends on CC_IS_CLANG && CLANG_VERSION >= 110000 && LD_IS_LLD
depends on $(success,test $(LLVM) -eq 1)
depends on $(success,test $(LLVM_IAS) -eq 1)
depends on $(success,$(NM) --help | head -n 1 | grep -qi llvm)
depends on $(success,$(AR) --help | head -n 1 | grep -qi llvm)
depends on ARCH_SUPPORTS_LTO_CLANG
depends on !FTRACE_MCOUNT_USE_RECORDMCOUNT
depends on !KASAN
depends on !KASAN || KASAN_HW_TAGS
depends on !GCOV_KERNEL
help
The compiler and Kconfig options support building with Clang's

View File

@ -0,0 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#ifdef __LINUX_COMPILER_VERSION_H
#error "Please do not include <linux/compiler-version.h>. This is done by the build system."
#endif
#define __LINUX_COMPILER_VERSION_H
/*
* This header exists to force full rebuild when the compiler is upgraded.
*
* When fixdep scans this, it will find this string "CONFIG_CC_VERSION_TEXT"
* and add dependency on include/config/cc/version/text.h, which is touched
* by Kconfig when the version string from the compiler changes.
*/

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@ -2,8 +2,6 @@
#ifndef __LINUX_KCONFIG_H
#define __LINUX_KCONFIG_H
/* CONFIG_CC_VERSION_TEXT (Do not delete this comment. See help in Kconfig) */
#include <generated/autoconf.h>
#ifdef CONFIG_CPU_BIG_ENDIAN

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@ -20,10 +20,10 @@ config CC_VERSION_TEXT
When the compiler is updated, Kconfig will be invoked.
- Ensure full rebuild when the compiler is updated
include/linux/kconfig.h contains this option in the comment line so
fixdep adds include/config/cc/version/text.h into the auto-generated
dependency. When the compiler is updated, syncconfig will touch it
and then every file will be rebuilt.
include/linux/compiler-version.h contains this option in the comment
line so fixdep adds include/config/cc/version/text.h into the
auto-generated dependency. When the compiler is updated, syncconfig
will touch it and then every file will be rebuilt.
config CC_IS_GCC
def_bool $(success,test "$(cc-name)" = GCC)

View File

@ -327,7 +327,7 @@ $(obj)/%.dtb.S: $(obj)/%.dtb FORCE
quiet_cmd_dtc = DTC $@
cmd_dtc = $(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
$(DTC) -O $(patsubst .%,%,$(suffix $@)) -o $@ -b 0 \
$(DTC) -o $@ -b 0 \
$(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \
-d $(depfile).dtc.tmp $(dtc-tmp) ; \
cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
@ -352,7 +352,7 @@ define rule_dtc
endef
$(obj)/%.dt.yaml: $(src)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
$(call if_changed_rule,dtc,yaml)
$(call if_changed_rule,dtc)
dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)

View File

@ -57,9 +57,9 @@ if arg_contain --version "$@"; then
fi
if arg_contain -E "$@"; then
# For scripts/gcc-version.sh; This emulates GCC 20.0.0
# For scripts/cc-version.sh; This emulates GCC 20.0.0
if arg_contain - "$@"; then
sed 's/^__GNUC__$/20/; s/^__GNUC_MINOR__$/0/; s/^__GNUC_PATCHLEVEL__$/0/'
sed -n '/^GCC/{s/__GNUC__/20/; s/__GNUC_MINOR__/0/; s/__GNUC_PATCHLEVEL__/0/; p;}'
exit 0
else
echo "no input files" >&2
@ -73,6 +73,15 @@ if arg_contain -S "$@"; then
echo "%gs"
exit 0
fi
# For arch/powerpc/tools/gcc-check-mprofile-kernel.sh
if arg_contain -m64 "$@" && arg_contain -mlittle-endian "$@" &&
arg_contain -mprofile-kernel "$@"; then
if ! test -t 0 && ! grep -q notrace; then
echo "_mcount"
fi
exit 0
fi
fi
# To set GCC_PLUGINS
@ -85,3 +94,8 @@ if arg_contain -print-file-name=plugin "$@"; then
echo $plugin_dir
exit 0
fi
# inverted return value
if arg_contain -D__SIZEOF_INT128__=0 "$@"; then
exit 1
fi

View File

@ -22,6 +22,7 @@ always-y += $(GCC_PLUGIN)
GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin)
plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \
-include $(srctree)/include/linux/compiler-version.h \
-I $(GCC_PLUGINS_DIR)/include -I $(obj) -std=gnu++11 \
-fno-rtti -fno-exceptions -fasynchronous-unwind-tables \
-ggdb -Wno-narrowing -Wno-unused-variable \

View File

@ -29,7 +29,7 @@ orig_args="$@"
# Get the first line of the --version output.
IFS='
'
set -- $("$@" --version)
set -- $(LC_ALL=C "$@" --version)
# Split the line on spaces.
IFS=' '
@ -44,14 +44,20 @@ if [ "$1" = GNU -a "$2" = ld ]; then
elif [ "$1" = GNU -a "$2" = gold ]; then
echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2
exit 1
elif [ "$1" = LLD ]; then
version=$2
min_version=$lld_min_version
name=LLD
disp_name=LLD
else
echo "$orig_args: unknown linker" >&2
exit 1
while [ $# -gt 1 -a "$1" != "LLD" ]; do
shift
done
if [ "$1" = LLD ]; then
version=$2
min_version=$lld_min_version
name=LLD
disp_name=LLD
else
echo "$orig_args: unknown linker" >&2
exit 1
fi
fi
# Some distributions append a package release number, as in 2.34-4.fc32