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authorLinus Torvalds <torvalds@linux-foundation.org>2017-07-08 00:09:24 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-08 00:09:24 +0300
commit58f051fc9828709e6c55803510761413d92c4e57 (patch)
tree8b92cf129f74105d9b17ada2b227aa45f2898d51 /Makefile
parentef3ad0898a60d30da7f170032992914998c366e5 (diff)
parentc4e6fff1ae5729c2af159008b13fca39fbbac70e (diff)
downloadlinux-58f051fc9828709e6c55803510761413d92c4e57.tar.xz
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
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile24
1 files changed, 8 insertions, 16 deletions
diff --git a/Makefile b/Makefile
index d7cb0372bed9..faea0e37c2f2 100644
--- a/Makefile
+++ b/Makefile
@@ -84,17 +84,10 @@ endif
# If the user is running make -s (silent mode), suppress echoing of
# commands
-ifneq ($(filter 4.%,$(MAKE_VERSION)),) # make-4
-ifneq ($(filter %s ,$(firstword x$(MAKEFLAGS))),)
+ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
quiet=silent_
tools_silent=s
endif
-else # make-3.8x
-ifneq ($(filter s% -s%,$(MAKEFLAGS)),)
- quiet=silent_
- tools_silent=-s
-endif
-endif
export quiet Q KBUILD_VERBOSE
@@ -113,8 +106,8 @@ export quiet Q KBUILD_VERBOSE
# The O= assignment takes precedence over the KBUILD_OUTPUT environment
# variable.
-# KBUILD_SRC is set on invocation of make in OBJ directory
-# KBUILD_SRC is not intended to be used by the regular user (for now)
+# KBUILD_SRC is not intended to be used by the regular user (for now),
+# it is set on invocation of make with KBUILD_OUTPUT or O= specified.
ifeq ($(KBUILD_SRC),)
# OK, Make called in directory where kernel src resides
@@ -135,7 +128,6 @@ ifneq ($(words $(subst :, ,$(CURDIR))), 1)
endif
ifneq ($(KBUILD_OUTPUT),)
-# Invoke a second make in the output directory, passing relevant variables
# check that the output directory actually exists
saved-output := $(KBUILD_OUTPUT)
KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \
@@ -148,6 +140,7 @@ PHONY += $(MAKECMDGOALS) sub-make
$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
@:
+# Invoke a second make in the output directory, passing relevant variables
sub-make:
$(Q)$(MAKE) -C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR) \
-f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS))
@@ -303,7 +296,7 @@ CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
HOSTCC = gcc
HOSTCXX = g++
-HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
+HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -std=gnu89
HOSTCXXFLAGS = -O2
ifeq ($(shell $(HOSTCC) -v 2>&1 | grep -c "clang version"), 1)
@@ -388,12 +381,10 @@ USERINCLUDE := \
# Needed to be compatible with the O= option
LINUXINCLUDE := \
-I$(srctree)/arch/$(hdr-arch)/include \
- -I$(objtree)/arch/$(hdr-arch)/include/generated/uapi \
-I$(objtree)/arch/$(hdr-arch)/include/generated \
$(if $(KBUILD_SRC), -I$(srctree)/include) \
- -I$(objtree)/include
-
-LINUXINCLUDE += $(filter-out $(LINUXINCLUDE),$(USERINCLUDE))
+ -I$(objtree)/include \
+ $(USERINCLUDE)
KBUILD_CPPFLAGS := -D__KERNEL__
@@ -707,6 +698,7 @@ 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