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Kbuild updates for v4.15 (2nd)

Browse source 
- Use pwd instead of /bin/pwd for portability
 
 - Clean up Makefiles
 
 - Fix ld-option for clang
 
 - Fix malloc'ed data size in Kconfig
 
 - Fix parallel building along with coccicheck
 
 - Fix a minor issue of package building
 
 - Prompt to use "rpm-pkg" instead of "rpm"
 
 - Clean up *.i and *.lst patterns by "make clean"
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Merge tag 'kbuild-v4.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull more Kbuild updates from Masahiro Yamada:

 - use 'pwd' instead of '/bin/pwd' for portability

 - clean up Makefiles

 - fix ld-option for clang

 - fix malloc'ed data size in Kconfig

 - fix parallel building along with coccicheck

 - fix a minor issue of package building

 - prompt to use "rpm-pkg" instead of "rpm"

 - clean up *.i and *.lst patterns by "make clean"

* tag 'kbuild-v4.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: drop $(extra-y) from real-objs-y
  kbuild: clean up *.i and *.lst patterns by make clean
  kbuild: rpm: prompt to use "rpm-pkg" if "rpm" target is used
  kbuild: pkg: use --transform option to prefix paths in tar
  coccinelle: fix parallel build with CHECK=scripts/coccicheck
  kconfig/symbol.c: use correct pointer type argument for sizeof
  kbuild: Set KBUILD_CFLAGS before incl. arch Makefile
  kbuild: remove all dummy assignments to obj-
  kbuild: create built-in.o automatically if parent directory wants it
  kbuild: /bin/pwd -> pwd
This commit is contained in:
Linus Torvalds 2017-11-25 08:06:30 -10:00
commit 5e2fda4776
29 changed files with 58 additions and 113 deletions
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2
Documentation/ia64/xen.txt
View file

@ -41,7 +41,7 @@ Getting and Building Xen and Dom0
5. make initrd for Dom0/DomU
# make -C linux-2.6.18-xen.hg ARCH=ia64 modules_install \
O=$(/bin/pwd)/build-linux-2.6.18-xen_ia64
O=$(pwd)/build-linux-2.6.18-xen_ia64
# mkinitrd -f /boot/efi/efi/redhat/initrd-2.6.18.8-xen.img \
2.6.18.8-xen --builtin mptspi --builtin mptbase \
--builtin mptscsih --builtin uhci-hcd --builtin ohci-hcd \

77
Makefile
View file

@ -132,7 +132,7 @@ 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)
&& pwd)
$(if $(KBUILD_OUTPUT),, \
$(error failed to create output directory "$(saved-output)"))
@ -474,6 +474,38 @@ ifneq ($(KBUILD_SRC),)
$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
endif
ifeq ($(cc-name),clang)
ifneq ($(CROSS_COMPILE),)
CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..)
endif
ifneq ($(GCC_TOOLCHAIN),)
CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
endif
KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
# Quiet clang warning: comparison of unsigned expression < 0 is always false
KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
# source of a reference will be _MergedGlobals and not on of the whitelisted names.
# See modpost pattern 2
KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
else
# These warnings generated too much noise in a regular build.
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
endif
ifeq ($(config-targets),1)
# ===========================================================================
# *config targets only - make sure prerequisites are updated, and descend
@ -684,38 +716,6 @@ ifdef CONFIG_CC_STACKPROTECTOR
endif
KBUILD_CFLAGS += $(stackp-flag)
ifeq ($(cc-name),clang)
ifneq ($(CROSS_COMPILE),)
CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
GCC_TOOLCHAIN := $(realpath $(dir $(shell which $(LD)))/..)
endif
ifneq ($(GCC_TOOLCHAIN),)
CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
endif
KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC)
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
# Quiet clang warning: comparison of unsigned expression < 0 is always false
KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
# source of a reference will be _MergedGlobals and not on of the whitelisted names.
# See modpost pattern 2
KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
else
# These warnings generated too much noise in a regular build.
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable)
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
endif
ifdef CONFIG_FRAME_POINTER
KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls
else
@ -1009,7 +1009,7 @@ $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
PHONY += $(vmlinux-dirs)
$(vmlinux-dirs): prepare scripts
$(Q)$(MAKE) $(build)=$@
$(Q)$(MAKE) $(build)=$@ need-builtin=1
define filechk_kernel.release
echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
@ -1337,8 +1337,9 @@ package-dir := scripts/package
$(Q)$(MAKE) $(build)=$(package-dir) $@
%pkg: include/config/kernel.release FORCE
$(Q)$(MAKE) $(build)=$(package-dir) $@
rpm: include/config/kernel.release FORCE
$(Q)$(MAKE) $(build)=$(package-dir) $@
rpm: rpm-pkg
@echo " WARNING: \"rpm\" target will be removed after Linux 4.18"
@echo " Please use \"rpm-pkg\" instead."
# Brief documentation of the typical targets used
@ -1546,9 +1547,9 @@ clean: $(clean-dirs)
$(call cmd,rmdirs)
$(call cmd,rmfiles)
@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \
-o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \
-o -name '*.dwo' \
-o -name '*.dwo' -o -name '*.lst' \
-o -name '*.su' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
-o -name '*.symtypes' -o -name 'modules.order' \

1
arch/arm/mach-uniphier/Makefile
View file

@ -1 +0,0 @@
obj- += dummy.o

3
arch/mips/boot/dts/brcm/Makefile
View file

@ -35,6 +35,3 @@ dtb-$(CONFIG_DT_NONE) += \
bcm97435svmb.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/cavium-octeon/Makefile
View file

@ -2,6 +2,3 @@
dtb-$(CONFIG_CAVIUM_OCTEON_SOC) += octeon_3xxx.dtb octeon_68xx.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/img/Makefile
View file

@ -3,6 +3,3 @@ dtb-$(CONFIG_FIT_IMAGE_FDT_BOSTON) += boston.dtb
dtb-$(CONFIG_MACH_PISTACHIO) += pistachio_marduk.dtb
obj-$(CONFIG_MACH_PISTACHIO) += pistachio_marduk.dtb.o
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/ingenic/Makefile
View file

@ -3,6 +3,3 @@ dtb-$(CONFIG_JZ4740_QI_LB60) += qi_lb60.dtb
dtb-$(CONFIG_JZ4780_CI20) += ci20.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/lantiq/Makefile
View file

@ -2,6 +2,3 @@
dtb-$(CONFIG_DT_EASY50712) += easy50712.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/mti/Makefile
View file

@ -3,6 +3,3 @@ dtb-$(CONFIG_MIPS_MALTA) += malta.dtb
dtb-$(CONFIG_LEGACY_BOARD_SEAD3) += sead3.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/netlogic/Makefile
View file

@ -6,6 +6,3 @@ dtb-$(CONFIG_DT_XLP_GVP) += xlp_gvp.dtb
dtb-$(CONFIG_DT_XLP_RVP) += xlp_rvp.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/ni/Makefile
View file

@ -1,4 +1 @@
dtb-$(CONFIG_FIT_IMAGE_FDT_NI169445) += 169445.dtb
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/pic32/Makefile
View file

@ -5,6 +5,3 @@ dtb-$(CONFIG_DTB_PIC32_NONE) += \
pic32mzda_sk.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/qca/Makefile
View file

@ -5,6 +5,3 @@ dtb-$(CONFIG_ATH79) += ar9331_dpt_module.dtb
dtb-$(CONFIG_ATH79) += ar9331_dragino_ms14.dtb
dtb-$(CONFIG_ATH79) += ar9331_omega.dtb
dtb-$(CONFIG_ATH79) += ar9331_tl_mr3020.dtb
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/ralink/Makefile
View file

@ -7,6 +7,3 @@ dtb-$(CONFIG_DTB_OMEGA2P) += omega2p.dtb
dtb-$(CONFIG_DTB_VOCORE2) += vocore2.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
arch/mips/boot/dts/xilfpga/Makefile
View file

@ -2,6 +2,3 @@
dtb-$(CONFIG_FIT_IMAGE_FDT_XILFPGA) += nexys4ddr.dtb
obj-y += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
# Force kbuild to make empty built-in.o if necessary
obj- += dummy.o

3
firmware/Makefile
View file

@ -59,6 +59,3 @@ endif
targets := $(patsubst $(obj)/%,%, \
$(shell find $(obj) -name \*.gen.S 2>/dev/null))
# Without this, built-in.o won't be created when it's empty, and the
# final vmlinux link will fail.
obj- := dummy

3
samples/bpf/Makefile
View file

@ -1,7 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := test_lru_dist
hostprogs-y += sock_example

3
samples/hidraw/Makefile
View file

@ -1,7 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := hid-example

3
samples/seccomp/Makefile
View file

@ -1,7 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
hostprogs-$(CONFIG_SAMPLE_SECCOMP) := bpf-fancy dropper bpf-direct
HOSTCFLAGS_bpf-fancy.o += -I$(objtree)/usr/include

3
samples/sockmap/Makefile
View file

@ -1,6 +1,3 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := sockmap

3
samples/statx/Makefile
View file

@ -1,6 +1,3 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-$(CONFIG_SAMPLE_STATX) := test-statx

3
samples/uhid/Makefile
View file

@ -1,6 +1,3 @@
# kbuild trick to avoid linker error. Can be omitted if a module is built.
obj- := dummy.o
# List of programs to build
hostprogs-y := uhid-example

4
scripts/Makefile.build
View file

@ -76,7 +76,7 @@ lib-target := $(obj)/lib.a
obj-y += $(obj)/lib-ksyms.o
endif
ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),)
ifneq ($(strip $(obj-y) $(need-builtin)),)
builtin-target := $(obj)/built-in.o
endif
@ -566,7 +566,7 @@ targets := $(filter-out $(PHONY), $(targets))
PHONY += $(subdir-ym)
$(subdir-ym):
$(Q)$(MAKE) $(build)=$@
$(Q)$(MAKE) $(build)=$@ need-builtin=$(if $(findstring $@,$(subdir-obj-y)),1)
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------

2
scripts/Makefile.lib
View file

@ -57,7 +57,7 @@ multi-objs-m := $(foreach m, $(multi-used-m), $($(m:.o=-objs)) $($(m:.o=-y)))
subdir-obj-y := $(filter %/built-in.o, $(obj-y))
# Replace multi-part objects by their individual parts, look at local dir only
real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m)))
real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m)))
# DTB

15
scripts/coccicheck
View file

@ -30,12 +30,6 @@ else
VERBOSE=0
fi
if [ -z "$J" ]; then
NPROC=$(getconf _NPROCESSORS_ONLN)
else
NPROC="$J"
fi
FLAGS="--very-quiet"
# You can use SPFLAGS to append extra arguments to coccicheck or override any
@ -70,6 +64,9 @@ if [ "$C" = "1" -o "$C" = "2" ]; then
# Take only the last argument, which is the C file to test
shift $(( $# - 1 ))
OPTIONS="$COCCIINCLUDE $1"
# No need to parallelize Coccinelle since this mode takes one input file.
NPROC=1
else
ONLINE=0
if [ "$KBUILD_EXTMOD" = "" ] ; then
@ -77,6 +74,12 @@ else
else
OPTIONS="--dir $KBUILD_EXTMOD $COCCIINCLUDE"
fi
if [ -z "$J" ]; then
NPROC=$(getconf _NPROCESSORS_ONLN)
else
NPROC="$J"
fi
fi
if [ "$KBUILD_EXTMOD" != "" ] ; then

2
scripts/kconfig/symbol.c
View file

@ -1061,7 +1061,7 @@ struct symbol **sym_re_search(const char *pattern)
}
if (sym_match_arr) {
qsort(sym_match_arr, cnt, sizeof(struct sym_match), sym_rel_comp);
sym_arr = malloc((cnt+1) * sizeof(struct symbol));
sym_arr = malloc((cnt+1) * sizeof(struct symbol *));
if (!sym_arr)
goto sym_re_search_free;
for (i = 0; i < cnt; i++)

7
scripts/package/Makefile
View file

@ -39,14 +39,13 @@ if test "$(objtree)" != "$(srctree)"; then \
false; \
fi ; \
$(srctree)/scripts/setlocalversion --save-scmversion; \
ln -sf $(srctree) $(2); \
tar -cz $(RCS_TAR_IGNORE) -f $(2).tar.gz \
$(addprefix $(2)/,$(TAR_CONTENT) $(3)); \
rm -f $(2) $(objtree)/.scmversion
--transform 's:^:$(2)/:S' $(TAR_CONTENT) $(3); \
rm -f $(objtree)/.scmversion
# rpm-pkg
# ---------------------------------------------------------------------------
rpm-pkg rpm: FORCE
rpm-pkg: FORCE
$(MAKE) clean
$(CONFIG_SHELL) $(MKSPEC) >$(objtree)/kernel.spec
$(call cmd,src_tar,$(KERNELPATH),kernel.spec)

2
tools/power/cpupower/Makefile
View file

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

2
tools/scripts/Makefile.include
View file

@ -13,7 +13,7 @@ endif
# check that the output directory actually exists
ifneq ($(OUTPUT),)
OUTDIR := $(shell cd $(OUTPUT) && /bin/pwd)
OUTDIR := $(shell cd $(OUTPUT) && pwd)
$(if $(OUTDIR),, $(error output directory "$(OUTPUT)" does not exist))
endif