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authorLinus Torvalds <torvalds@linux-foundation.org>2021-03-13 12:18:59 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-03-13 12:18:59 -0800
commite83bad7f77a4348277c3ebe9bea4a5b0cd6dfcb5 (patch)
tree13ea5434aedf1a6bc580006ec9950cd843fc0aa2
parentf296bfd5cd04cbb49b8fc9585adc280ab2b58624 (diff)
parentbcbcf50f521843445c9ea320a0569874f88c4b7a (diff)
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
-rw-r--r--Makefile4
-rw-r--r--arch/Kconfig3
-rw-r--r--include/linux/compiler-version.h14
-rw-r--r--include/linux/kconfig.h2
-rw-r--r--init/Kconfig8
-rw-r--r--scripts/Makefile.lib4
-rwxr-xr-xscripts/dummy-tools/gcc18
-rw-r--r--scripts/gcc-plugins/Makefile1
-rwxr-xr-xscripts/ld-version.sh22
9 files changed, 55 insertions, 21 deletions
diff --git a/Makefile b/Makefile
index 31dcdb3d61fa..10bb0a62cc7d 100644
--- a/Makefile
+++ b/Makefile
@@ -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.
diff --git a/arch/Kconfig b/arch/Kconfig
index 2bb30673d8e6..ecfd3520b676 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -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
diff --git a/include/linux/compiler-version.h b/include/linux/compiler-version.h
new file mode 100644
index 000000000000..2b2972c77c62
--- /dev/null
+++ b/include/linux/compiler-version.h
@@ -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.
+ */
diff --git a/include/linux/kconfig.h b/include/linux/kconfig.h
index e78e17a76dc9..24a59cb06963 100644
--- a/include/linux/kconfig.h
+++ b/include/linux/kconfig.h
@@ -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
diff --git a/init/Kconfig b/init/Kconfig
index 22946fe5ded9..30c849094c28 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -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)
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index eee59184de64..8cd67b1b6d15 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -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)
diff --git a/scripts/dummy-tools/gcc b/scripts/dummy-tools/gcc
index 5c113cad5601..39e65fee59bd 100755
--- a/scripts/dummy-tools/gcc
+++ b/scripts/dummy-tools/gcc
@@ -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
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index b5487cce69e8..1952d3bb80c6 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -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 $(obj) -std=gnu++11 \
-fno-rtti -fno-exceptions -fasynchronous-unwind-tables \
-ggdb -Wno-narrowing -Wno-unused-variable \
diff --git a/scripts/ld-version.sh b/scripts/ld-version.sh
index a463273509b5..1bf3aadde9de 100755
--- a/scripts/ld-version.sh
+++ b/scripts/ld-version.sh
@@ -29,7 +29,7 @@ orig_args="$@"
# 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

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