Kbuild updates for v4.14

- Use Make-builtin $(abspath ...) helper to get absolute path
 
 - Add W=2 extra warning option to detect unused macros
 
 - Use more KCONFIG_CONFIG instead hard-coded .config
 
 - Fix bugs of tar*-pkg targets
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Merge tag 'kbuild-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Use Make-builtin $(abspath ...) helper to get absolute path

 - Add W=2 extra warning option to detect unused macros

 - Use more KCONFIG_CONFIG instead hard-coded .config

 - Fix bugs of tar*-pkg targets

* tag 'kbuild-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: buildtar: do not print successful message if tar returns error
  kbuild: buildtar: fix tar error when CONFIG_MODULES is disabled
  kbuild: Use KCONFIG_CONFIG in buildtar
  Kbuild: enable -Wunused-macros warning for "make W=2"
  kbuild: use $(abspath ...) instead of $(shell cd ... && /bin/pwd)
This commit is contained in:
Linus Torvalds 2017-09-14 13:46:33 -07:00
commit a2bc8dea9e
6 changed files with 29 additions and 30 deletions

View File

@ -130,8 +130,8 @@ endif
ifneq ($(KBUILD_OUTPUT),)
# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
&& /bin/pwd)
$(shell [ -d $(KBUILD_OUTPUT) ] || mkdir -p $(KBUILD_OUTPUT))
KBUILD_OUTPUT := $(realpath $(KBUILD_OUTPUT))
$(if $(KBUILD_OUTPUT),, \
$(error failed to create output directory "$(saved-output)"))
@ -978,7 +978,7 @@ ifdef CONFIG_HEADERS_CHECK
$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
endif
ifdef CONFIG_GDB_SCRIPTS
$(Q)ln -fsn `cd $(srctree) && /bin/pwd`/scripts/gdb/vmlinux-gdb.py
$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
endif
ifdef CONFIG_TRIM_UNUSED_KSYMS
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
@ -1238,7 +1238,7 @@ _modinst_:
@rm -rf $(MODLIB)/kernel
@rm -f $(MODLIB)/source
@mkdir -p $(MODLIB)/kernel
@ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
@ln -s $(abspath $(srctree)) $(MODLIB)/source
@if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
rm -f $(MODLIB)/build ; \
ln -s $(CURDIR) $(MODLIB)/build ; \
@ -1630,11 +1630,11 @@ image_name:
# Clear a bunch of variables before executing the submake
tools/: FORCE
$(Q)mkdir -p $(objtree)/tools
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/
tools/%: FORCE
$(Q)mkdir -p $(objtree)/tools
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(shell cd $(objtree) && /bin/pwd) subdir=tools -C $(src)/tools/ $*
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ $*
# Single targets
# ---------------------------------------------------------------------------

View File

@ -37,6 +37,7 @@ warning-2 += $(call cc-option, -Wlogical-op)
warning-2 += $(call cc-option, -Wmissing-field-initializers)
warning-2 += $(call cc-option, -Wsign-compare)
warning-2 += $(call cc-option, -Wmaybe-uninitialized)
warning-2 += $(call cc-option, -Wunused-macros)
warning-3 := -Wbad-function-cast
warning-3 += -Wcast-qual

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@ -1,6 +1,6 @@
always := gdb-scripts
SRCTREE := $(shell cd $(srctree) && /bin/pwd)
SRCTREE := $(abspath $(srctree))
$(obj)/gdb-scripts:
ifneq ($(KBUILD_SRC),)

View File

@ -24,20 +24,19 @@ tarball="${objtree}/linux-${KERNELRELEASE}-${ARCH}.tar"
#
case "${1}" in
tar-pkg)
compress="cat"
file_ext=""
opts=
;;
targz-pkg)
compress="gzip"
file_ext=".gz"
opts=--gzip
tarball=${tarball}.gz
;;
tarbz2-pkg)
compress="bzip2"
file_ext=".bz2"
opts=--bzip2
tarball=${tarball}.bz2
;;
tarxz-pkg)
compress="xz"
file_ext=".xz"
opts=--xz
tarball=${tarball}.xz
;;
*)
echo "Unknown tarball target \"${1}\" requested, please add it to ${0}." >&2
@ -51,13 +50,14 @@ esac
#
rm -rf -- "${tmpdir}"
mkdir -p -- "${tmpdir}/boot"
dirs=boot
#
# Try to install modules
#
if grep -q '^CONFIG_MODULES=y' "${objtree}/.config"; then
if grep -q '^CONFIG_MODULES=y' "${KCONFIG_CONFIG}"; then
make ARCH="${ARCH}" O="${objtree}" KBUILD_SRC= INSTALL_MOD_PATH="${tmpdir}" modules_install
dirs="$dirs lib"
fi
@ -65,7 +65,7 @@ fi
# Install basic kernel files
#
cp -v -- "${objtree}/System.map" "${tmpdir}/boot/System.map-${KERNELRELEASE}"
cp -v -- "${objtree}/.config" "${tmpdir}/boot/config-${KERNELRELEASE}"
cp -v -- "${KCONFIG_CONFIG}" "${tmpdir}/boot/config-${KERNELRELEASE}"
cp -v -- "${objtree}/vmlinux" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}"
@ -124,14 +124,12 @@ esac
#
# Create the tarball
#
(
opts=
if tar --owner=root --group=root --help >/dev/null 2>&1; then
opts="--owner=root --group=root"
fi
tar cf - -C "$tmpdir" boot/ lib/ $opts | ${compress} > "${tarball}${file_ext}"
)
if tar --owner=root --group=root --help >/dev/null 2>&1; then
opts="$opts --owner=root --group=root"
fi
echo "Tarball successfully created in ${tarball}${file_ext}"
tar cf $tarball -C $tmpdir $opts $dirs
echo "Tarball successfully created in $tarball"
exit 0

View File

@ -26,7 +26,7 @@ endif
ifneq ($(OUTPUT),)
# check that the output directory actually exists
OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
OUTDIR := $(realpath $(OUTPUT))
$(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
endif

View File

@ -1,7 +1,7 @@
ifneq ($(O),)
ifeq ($(origin O), command line)
dummy := $(if $(shell test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
ABSOLUTE_O := $(shell cd $(O) ; pwd)
ABSOLUTE_O := $(realpath $(O))
dummy := $(if $(ABSOLUTE_O),,$(error O=$(O) does not exist))
OUTPUT := $(ABSOLUTE_O)/$(if $(subdir),$(subdir)/)
COMMAND_O := O=$(ABSOLUTE_O)
ifeq ($(objtree),)
@ -12,7 +12,7 @@ endif
# check that the output directory actually exists
ifneq ($(OUTPUT),)
OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
OUTDIR := $(realpath $(OUTPUT))
$(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
endif