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Kbuild updates for v4.13
- Clean up Makefiles and scripts - Improve clang support - Remove unneeded genhdr-y syntax - Remove unneeded cc-option-align macro - Introduce __cc-option macro and use it to fix x86 boot code compiler flags -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJZXrlEAAoJED2LAQed4NsGOQ0P/ic6kvcXoquvO47NeZeGgprN Ffy7yt06ZpKE6ntKT2YGf8vIkBADAnGBmP9lFga7JRTFrBS/4fDCEoosjb7a7yYG 6QZ2CCVkpyUt5rizSFPiQ2A1EIsIvhQEHBGdE3upbX4dC6or/MRwWnyudYvFQYWc Ft5VGqENHxVIMCPm5pmNrZH4lOUv13KFlEWHFozPtwKXYIp8KZw88kJVJODPOuhM yWuXEkcg9f+SEjNeSn7uZ0P4JGDqeQz16EKW4/cMdERaqtb5diPNhUBIQ9X5qjR+ wQg//tMFKjveKPr8bNHnzjHCwz7xto0GBnqYoXQO4cxMm7heNeFWAS09YnDd58JS hb3BCF3QpojaLQUFb/elo8Gaolx4FepKVnvbCCV03TJCB3zyKTSaAx0cJxoRCajd iR5FEUDA0pacM6380ifYEWUu98LgWxhJfrcQuJ1F+g3/8uoMqLIIpC7YsdnEGzy2 Zhcz+Id5YMBla4w9ceUf9Zm+scCNxySWkANYPxC+QxwtNnDU5JrNhOnMXO/x4BEm rBICh3jY1gJRD/nuQ3L0XXX9taXD+z19DBsngt2XgVX6ec0EitZEkoR/f1yIrCNB zFfOeM2KD7Rg4iAzmE/L1clwJufXbZbRNKJjg5o2/1t2+TgRCnYNkCzCbr/Kqi8a ugje+BAynfUrARSJH1Uk =0ZOV -----END PGP SIGNATURE----- Merge tag 'kbuild-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - Clean up Makefiles and scripts - Improve clang support - Remove unneeded genhdr-y syntax - Remove unneeded cc-option-align macro - Introduce __cc-option macro and use it to fix x86 boot code compiler flags * tag 'kbuild-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kbuild: improve comments on KBUILD_SRC x86/build: Specify stack alignment for clang x86/build: Use __cc-option for boot code compiler options kbuild: Add __cc-option macro kbuild: remove cc-option-align kbuild: replace genhdr-y with generated-y kbuild: clang: Disable 'address-of-packed-member' warning kbuild: remove duplicated arch/*/include/generated/uapi include path kbuild: speed up checksyscalls.sh kbuild: simplify silent build (-s) detection
This commit is contained in:
Linus Torvalds
commit
58f051fc98
12 changed files with 67 additions and 104 deletions
24
Makefile
24
Makefile
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@ -84,17 +84,10 @@ endif
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# If the user is running make -s (silent mode), suppress echoing of
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# commands
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ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
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ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
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ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
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quiet=silent_
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tools_silent=s
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endif
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else # make-3.8x
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ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
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quiet=silent_
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tools_silent=-s
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endif
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endif
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export quiet Q KBUILD_VERBOSE
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@ -113,8 +106,8 @@ export quiet Q KBUILD_VERBOSE
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# The O= assignment takes precedence over the KBUILD_OUTPUT environment
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# variable.
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# KBUILD_SRC is set on invocation of make in OBJ directory
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# KBUILD_SRC is not intended to be used by the regular user (for now)
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# KBUILD_SRC is not intended to be used by the regular user (for now),
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# it is set on invocation of make with KBUILD_OUTPUT or O= specified.
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ifeq ($(KBUILD_SRC),)
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# OK, Make called in directory where kernel src resides
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@ -135,7 +128,6 @@ ifneq ($(words $(subst :, ,$(CURDIR))), 1)
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endif
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ifneq ($(KBUILD_OUTPUT),)
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# Invoke a second make in the output directory, passing relevant variables
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# check that the output directory actually exists
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saved-output := $(KBUILD_OUTPUT)
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KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
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@ -148,6 +140,7 @@ PHONY += $(MAKECMDGOALS) sub-make
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$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
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@:
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# Invoke a second make in the output directory, passing relevant variables
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sub-make:
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$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
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-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
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@ -303,7 +296,7 @@ CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
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HOSTCC = gcc
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HOSTCXX = g++
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HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
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HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
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HOSTCXXFLAGS = -O2
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ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
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@ -388,12 +381,10 @@ USERINCLUDE := \
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# Needed to be compatible with the O= option
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LINUXINCLUDE := \
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-I$(srctree)/arch/$(hdr-arch)/include \
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-I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
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-I$(objtree)/arch/$(hdr-arch)/include/generated \
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$(if $(KBUILD_SRC), -I$(srctree)/include) \
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-I$(objtree)/include
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LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE))
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-I$(objtree)/include \
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$(USERINCLUDE)
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KBUILD_CPPFLAGS := -D__KERNEL__
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@ -707,6 +698,7 @@ KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
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KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)
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KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier)
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KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
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KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
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# Quiet clang warning: comparison of unsigned expression < 0 is always false
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KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
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# CLANG uses a _MergedGlobals as optimization, but this breaks modpost, as the
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