Merge tag 'kbuild-fixes-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- fix O= building on dash
- remove unused dependency in Makefile
- fix default of a choice in Kconfig
- fix typos and documentation style
- fix command options unrecognized by sparse
* tag 'kbuild-fixes-v4.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: clang: fix build failures with sparse check
kbuild doc: a bundle of fixes on makefiles.txt
Makefile: kselftest: fix grammar typo
kbuild: Fix optimization level choice default
kbuild: drop unused symverfile in Makefile.modpost
kbuild: revert $(realpath ...) to $(shell cd ... && /bin/pwd)
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 329e740..f6f8038 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -1108,14 +1108,6 @@
ld
Link target. Often, LDFLAGS_$@ is used to set specific options to ld.
- objcopy
- Copy binary. Uses OBJCOPYFLAGS usually specified in
- arch/$(ARCH)/Makefile.
- OBJCOPYFLAGS_$@ may be used to set additional options.
-
- gzip
- Compress target. Use maximum compression to compress target.
-
Example:
#arch/x86/boot/Makefile
LDFLAGS_bootsect := -Ttext 0x0 -s --oformat binary
@@ -1139,6 +1131,19 @@
resulting in the target file being recompiled for no
obvious reason.
+ objcopy
+ Copy binary. Uses OBJCOPYFLAGS usually specified in
+ arch/$(ARCH)/Makefile.
+ OBJCOPYFLAGS_$@ may be used to set additional options.
+
+ gzip
+ Compress target. Use maximum compression to compress target.
+
+ Example:
+ #arch/x86/boot/compressed/Makefile
+ $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
+ $(call if_changed,gzip)
+
dtc
Create flattened device tree blob object suitable for linking
into vmlinux. Device tree blobs linked into vmlinux are placed
@@ -1219,7 +1224,7 @@
that may be shared between individual architectures.
The recommended approach how to use a generic header file is
to list the file in the Kbuild file.
- See "7.3 generic-y" for further info on syntax etc.
+ See "7.2 generic-y" for further info on syntax etc.
--- 6.11 Post-link pass
@@ -1254,13 +1259,13 @@
arch/<arch>/include/asm/ to list asm files coming from asm-generic.
See subsequent chapter for the syntax of the Kbuild file.
- --- 7.1 no-export-headers
+--- 7.1 no-export-headers
no-export-headers is essentially used by include/uapi/linux/Kbuild to
avoid exporting specific headers (e.g. kvm.h) on architectures that do
not support it. It should be avoided as much as possible.
- --- 7.2 generic-y
+--- 7.2 generic-y
If an architecture uses a verbatim copy of a header from
include/asm-generic then this is listed in the file
@@ -1287,7 +1292,7 @@
Example: termios.h
#include <asm-generic/termios.h>
- --- 7.3 generated-y
+--- 7.3 generated-y
If an architecture generates other header files alongside generic-y
wrappers, generated-y specifies them.
@@ -1299,7 +1304,7 @@
#arch/x86/include/asm/Kbuild
generated-y += syscalls_32.h
- --- 7.5 mandatory-y
+--- 7.4 mandatory-y
mandatory-y is essentially used by include/uapi/asm-generic/Kbuild.asm
to define the minimum set of headers that must be exported in
diff --git a/Makefile b/Makefile
index 01875d6..2900c54 100644
--- a/Makefile
+++ b/Makefile
@@ -130,8 +130,8 @@
ifneq ($(KBUILD_OUTPUT),)
# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
-$(shell [ -d $(KBUILD_OUTPUT) ] || mkdir -p $(KBUILD_OUTPUT))
-KBUILD_OUTPUT := $(realpath $(KBUILD_OUTPUT))
+KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
+ && /bin/pwd)
$(if $(KBUILD_OUTPUT),, \
$(error failed to create output directory "$(saved-output)"))
@@ -697,11 +697,11 @@
ifeq ($(cc-name),clang)
ifneq ($(CROSS_COMPILE),)
-CLANG_TARGET := -target $(notdir $(CROSS_COMPILE:%-=%))
+CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..)
endif
ifneq ($(GCC_TOOLCHAIN),)
-CLANG_GCC_TC := -gcc-toolchain $(GCC_TOOLCHAIN)
+CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
endif
KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
@@ -1399,7 +1399,7 @@
@echo ' Build, install, and boot kernel before'
@echo ' running kselftest on it'
@echo ' kselftest-clean - Remove all generated kselftest files'
- @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existed'
+ @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing'
@echo ' .config.'
@echo ''
@echo 'Userspace tools targets:'
diff --git a/init/Kconfig b/init/Kconfig
index 78cb246..3c1faaa 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1033,7 +1033,7 @@
choice
prompt "Compiler optimization level"
- default CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
+ default CC_OPTIMIZE_FOR_PERFORMANCE
config CC_OPTIMIZE_FOR_PERFORMANCE
bool "Optimize for performance"
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 16923ba..756d14f 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -97,7 +97,6 @@
$(call cmd,kernel-mod)
# Declare generated files as targets for modpost
-$(symverfile): __modpost ;
$(modules:.ko=.mod.c): __modpost ;
diff --git a/tools/power/cpupower/Makefile b/tools/power/cpupower/Makefile
index 4c5a481..d6e1c02 100644
--- a/tools/power/cpupower/Makefile
+++ b/tools/power/cpupower/Makefile
@@ -26,7 +26,7 @@
ifneq ($(OUTPUT),)
# check that the output directory actually exists
-OUTDIR := $(realpath $(OUTPUT))
+OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
$(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
endif
diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
index 9dc8f07..1e8b611 100644
--- a/tools/scripts/Makefile.include
+++ b/tools/scripts/Makefile.include
@@ -1,7 +1,7 @@
ifneq ($(O),)
ifeq ($(origin O), command line)
- ABSOLUTE_O := $(realpath $(O))
- dummy := $(if $(ABSOLUTE_O),,$(error O=$(O) does not exist))
+ dummy := $(if $(shell test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
+ ABSOLUTE_O := $(shell cd $(O) ; pwd)
OUTPUT := $(ABSOLUTE_O)/$(if $(subdir),$(subdir)/)
COMMAND_O := O=$(ABSOLUTE_O)
ifeq ($(objtree),)
@@ -12,7 +12,7 @@
# check that the output directory actually exists
ifneq ($(OUTPUT),)
-OUTDIR := $(realpath $(OUTPUT))
+OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
$(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
endif