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-rw-r--r--Makefile331
1 files changed, 184 insertions, 147 deletions
diff --git a/Makefile b/Makefile
index fa0fbe7851ea..d456746da347 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
VERSION = 5
PATCHLEVEL = 3
SUBLEVEL = 0
-EXTRAVERSION = -rc2
+EXTRAVERSION =
NAME = Bobtail Squid
# *DOCUMENTATION*
@@ -230,6 +230,8 @@ endif
export KBUILD_CHECKSRC KBUILD_EXTMOD
+extmod-prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/)
+
ifeq ($(abs_srctree),$(abs_objtree))
# building in the source tree
srctree := .
@@ -271,52 +273,62 @@ no-dot-config-targets := $(clean-targets) \
%asm-generic kernelversion %src-pkg
no-sync-config-targets := $(no-dot-config-targets) install %install \
kernelrelease
+single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
-config-targets := 0
-mixed-targets := 0
-dot-config := 1
-may-sync-config := 1
+config-build :=
+mixed-build :=
+need-config := 1
+may-sync-config := 1
+single-build :=
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
- dot-config := 0
+ need-config :=
endif
endif
ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
- may-sync-config := 0
+ may-sync-config :=
endif
endif
ifneq ($(KBUILD_EXTMOD),)
- may-sync-config := 0
+ may-sync-config :=
endif
ifeq ($(KBUILD_EXTMOD),)
ifneq ($(filter config %config,$(MAKECMDGOALS)),)
- config-targets := 1
+ config-build := 1
ifneq ($(words $(MAKECMDGOALS)),1)
- mixed-targets := 1
+ mixed-build := 1
endif
endif
endif
+# We cannot build single targets and the others at the same time
+ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),)
+ single-build := 1
+ ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),)
+ mixed-build := 1
+ endif
+endif
+
# For "make -j clean all", "make -j mrproper defconfig all", etc.
ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),)
ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),)
- mixed-targets := 1
+ mixed-build := 1
endif
endif
# install and modules_install need also be processed one by one
ifneq ($(filter install,$(MAKECMDGOALS)),)
ifneq ($(filter modules_install,$(MAKECMDGOALS)),)
- mixed-targets := 1
+ mixed-build := 1
endif
endif
-ifeq ($(mixed-targets),1)
+ifdef mixed-build
# ===========================================================================
# We're called with mixed targets (*config and build targets).
# Handle them one by one.
@@ -332,7 +344,7 @@ __build_one_by_one:
$(MAKE) -f $(srctree)/Makefile $$i; \
done
-else
+else # !mixed-build
include scripts/Kbuild.include
@@ -392,9 +404,7 @@ KCONFIG_CONFIG ?= .config
export KCONFIG_CONFIG
# SHELL used by kbuild
-CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
- else if [ -x /bin/bash ]; then echo /bin/bash; \
- else echo sh; fi ; fi)
+CONFIG_SHELL := sh
HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null)
HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null)
@@ -419,6 +429,7 @@ NM = $(CROSS_COMPILE)nm
STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
+OBJSIZE = $(CROSS_COMPILE)size
PAHOLE = pahole
LEX = flex
YACC = bison
@@ -430,6 +441,7 @@ PYTHON = python
PYTHON2 = python2
PYTHON3 = python3
CHECK = sparse
+BASH = bash
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
@@ -469,14 +481,16 @@ KBUILD_AFLAGS_KERNEL :=
KBUILD_CFLAGS_KERNEL :=
KBUILD_AFLAGS_MODULE := -DMODULE
KBUILD_CFLAGS_MODULE := -DMODULE
-KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
+KBUILD_LDFLAGS_MODULE :=
+export KBUILD_LDS_MODULE := $(srctree)/scripts/module-common.lds
KBUILD_LDFLAGS :=
GCC_PLUGINS_CFLAGS :=
+CLANG_FLAGS :=
-export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
-export CPP AR NM STRIP OBJCOPY OBJDUMP PAHOLE KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS
-export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE
-export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
+export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
+export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE PAHOLE LEX YACC AWK INSTALLKERNEL
+export PERL PYTHON PYTHON2 PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
+export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
@@ -504,6 +518,7 @@ scripts_basic:
$(Q)rm -f .tmp_quiet_recordmcount
PHONY += outputmakefile
+# Before starting out-of-tree build, make sure the source tree is clean.
# outputmakefile generates a Makefile in the output directory, if using a
# separate output directory. This allows convenient use of make in the
# output directory.
@@ -511,6 +526,15 @@ PHONY += outputmakefile
# ignore whole output directory
outputmakefile:
ifdef building_out_of_srctree
+ $(Q)if [ -f $(srctree)/.config -o \
+ -d $(srctree)/include/config -o \
+ -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
+ echo >&2 "***"; \
+ echo >&2 "*** The source tree is not clean, please run 'make$(if $(findstring command line, $(origin ARCH)), ARCH=$(ARCH)) mrproper'"; \
+ echo >&2 "*** in $(abs_srctree)";\
+ echo >&2 "***"; \
+ false; \
+ fi
$(Q)ln -fsn $(srctree) source
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree)
$(Q)test -e .gitignore || \
@@ -519,7 +543,7 @@ endif
ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
ifneq ($(CROSS_COMPILE),)
-CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%))
+CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)
GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
@@ -542,7 +566,7 @@ endif
# and from include/config/auto.conf.cmd to detect the compiler upgrade.
CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
-ifeq ($(config-targets),1)
+ifdef config-build
# ===========================================================================
# *config targets only - make sure prerequisites are updated, and descend
# in scripts/kconfig to make the *config target
@@ -553,13 +577,13 @@ ifeq ($(config-targets),1)
include arch/$(SRCARCH)/Makefile
export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
-config: scripts_basic outputmakefile FORCE
+config: outputmakefile scripts_basic FORCE
$(Q)$(MAKE) $(build)=scripts/kconfig $@
-%config: scripts_basic outputmakefile FORCE
+%config: outputmakefile scripts_basic FORCE
$(Q)$(MAKE) $(build)=scripts/kconfig $@
-else
+else #!config-build
# ===========================================================================
# Build targets only - this includes vmlinux, arch specific targets, clean
# targets and others. In general all targets except *config targets.
@@ -602,7 +626,7 @@ endif
export KBUILD_MODULES KBUILD_BUILTIN
-ifeq ($(dot-config),1)
+ifdef need-config
include include/config/auto.conf
endif
@@ -643,15 +667,10 @@ RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc
export RETPOLINE_CFLAGS
export RETPOLINE_VDSO_CFLAGS
-# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
-# values of the respective KBUILD_* variables
-ARCH_CPPFLAGS :=
-ARCH_AFLAGS :=
-ARCH_CFLAGS :=
include arch/$(SRCARCH)/Makefile
-ifeq ($(dot-config),1)
-ifeq ($(may-sync-config),1)
+ifdef need-config
+ifdef may-sync-config
# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
# because some architectures define CROSS_COMPILE there.
@@ -674,7 +693,7 @@ $(KCONFIG_CONFIG):
# The syncconfig should be executed only once to make all the targets.
%/auto.conf %/auto.conf.cmd %/tristate.conf: $(KCONFIG_CONFIG)
$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig
-else
+else # !may-sync-config
# External modules and some install targets need include/generated/autoconf.h
# and include/config/auto.conf but do not care if they are up-to-date.
# Use auto.conf to trigger the test
@@ -690,7 +709,7 @@ include/config/auto.conf:
/bin/false)
endif # may-sync-config
-endif # $(dot-config)
+endif # need-config
KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
@@ -698,10 +717,12 @@ KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow)
KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
-ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
-KBUILD_CFLAGS += -Os
-else
-KBUILD_CFLAGS += -O2
+ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE
+KBUILD_CFLAGS += -O2
+else ifdef CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE_O3
+KBUILD_CFLAGS += -O3
+else ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
+KBUILD_CFLAGS += -Os
endif
ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED
@@ -749,6 +770,11 @@ else
# These warnings generated too much noise in a regular build.
# Use make W=1 to enable them (see scripts/Makefile.extrawarn)
KBUILD_CFLAGS += -Wno-unused-but-set-variable
+
+# Warn about unmarked fall-throughs in switch statement.
+# Disabled for clang while comment to attribute conversion happens and
+# https://github.com/ClangBuiltLinux/linux/issues/636 is discussed.
+KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough,)
endif
KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable)
@@ -843,9 +869,6 @@ NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
# warn about C99 declaration after statement
KBUILD_CFLAGS += -Wdeclaration-after-statement
-# Warn about unmarked fall-throughs in switch statement.
-KBUILD_CFLAGS += $(call cc-option,-Wimplicit-fallthrough=3,)
-
# Variable Length Arrays (VLAs) should not be used anywhere in the kernel
KBUILD_CFLAGS += -Wvla
@@ -898,11 +921,10 @@ include scripts/Makefile.kasan
include scripts/Makefile.extrawarn
include scripts/Makefile.ubsan
-# Add any arch overrides and user supplied CPPFLAGS, AFLAGS and CFLAGS as the
-# last assignments
-KBUILD_CPPFLAGS += $(ARCH_CPPFLAGS) $(KCPPFLAGS)
-KBUILD_AFLAGS += $(ARCH_AFLAGS) $(KAFLAGS)
-KBUILD_CFLAGS += $(ARCH_CFLAGS) $(KCFLAGS)
+# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
+KBUILD_CPPFLAGS += $(KCPPFLAGS)
+KBUILD_AFLAGS += $(KAFLAGS)
+KBUILD_CFLAGS += $(KCFLAGS)
KBUILD_LDFLAGS_MODULE += --build-id
LDFLAGS_vmlinux += --build-id
@@ -911,6 +933,10 @@ ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
LDFLAGS_vmlinux += $(call ld-option, -X,)
endif
+ifeq ($(CONFIG_RELR),y)
+LDFLAGS_vmlinux += --pack-dyn-relocs=relr
+endif
+
# insure the checker run with the right endianness
CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
@@ -1001,6 +1027,8 @@ endif
PHONY += prepare0
+export MODORDER := $(extmod-prefix)modules.order
+
ifeq ($(KBUILD_EXTMOD),)
core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/
@@ -1012,6 +1040,9 @@ vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
$(patsubst %/,%,$(filter %/, $(init-) $(core-) \
$(drivers-) $(net-) $(libs-) $(virt-))))
+build-dirs := $(vmlinux-dirs)
+clean-dirs := $(vmlinux-alldirs)
+
init-y := $(patsubst %/, %/built-in.a, $(init-y))
core-y := $(patsubst %/, %/built-in.a, $(core-y))
drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y))
@@ -1034,7 +1065,7 @@ vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
# Recurse until adjust_autoksyms.sh is satisfied
PHONY += autoksyms_recursive
ifdef CONFIG_TRIM_UNUSED_KSYMS
-autoksyms_recursive: $(vmlinux-deps) modules.order
+autoksyms_recursive: descend modules.order
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
"$(MAKE) -f $(srctree)/Makefile vmlinux"
endif
@@ -1066,17 +1097,7 @@ targets := vmlinux
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
-$(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
-
-# Handle descending into subdirectories listed in $(vmlinux-dirs)
-# Preset locale variables to speed up the build process. Limit locale
-# tweaks to this spot to avoid wrong language settings when running
-# make menuconfig etc.
-# Error messages still appears in the original language
-
-PHONY += $(vmlinux-dirs)
-$(vmlinux-dirs): prepare
- $(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1
+$(sort $(vmlinux-deps)): descend ;
filechk_kernel.release = \
echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
@@ -1098,24 +1119,9 @@ scripts: scripts_basic scripts_dtc
# archprepare is used in arch Makefiles and when processed asm symlink,
# version.h and scripts_basic is processed / created.
-PHONY += prepare archprepare prepare3
-
-# prepare3 is used to check if we are building in a separate output directory,
-# and if so do:
-# 1) Check that make has not been executed in the kernel src $(srctree)
-prepare3: include/config/kernel.release
-ifdef building_out_of_srctree
- @$(kecho) ' Using $(srctree) as source for kernel'
- $(Q)if [ -f $(srctree)/.config -o \
- -d $(srctree)/include/config -o \
- -d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
- echo >&2 " $(srctree) is not clean, please run 'make ARCH=$(ARCH) mrproper'"; \
- echo >&2 " in the '$(srctree)' directory.";\
- /bin/false; \
- fi;
-endif
+PHONY += prepare archprepare
-archprepare: archheaders archscripts scripts prepare3 outputmakefile \
+archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h
prepare0: archprepare
@@ -1240,7 +1246,7 @@ kselftest-merge:
$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
$(Q)find $(srctree)/tools/testing/selftests -name config | \
xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
- +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
+ $(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
# ---------------------------------------------------------------------------
# Devicetree files
@@ -1251,11 +1257,11 @@ endif
ifneq ($(dtstree),)
-%.dtb: prepare3 scripts_dtc
+%.dtb: include/config/kernel.release scripts_dtc
$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@
PHONY += dtbs dtbs_install dt_binding_check
-dtbs dtbs_check: prepare3 scripts_dtc
+dtbs dtbs_check: include/config/kernel.release scripts_dtc
$(Q)$(MAKE) $(build)=$(dtstree)
dtbs_check: export CHECK_DTBS=1
@@ -1294,17 +1300,16 @@ all: modules
PHONY += modules
modules: $(if $(KBUILD_BUILTIN),vmlinux) modules.order modules.builtin
- @$(kecho) ' Building modules, stage 2.';
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh
-modules.order: $(vmlinux-dirs)
- $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@
+modules.order: descend
+ $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
-modbuiltin-dirs := $(addprefix _modbuiltin_, $(vmlinux-dirs))
+modbuiltin-dirs := $(addprefix _modbuiltin_, $(build-dirs))
modules.builtin: $(modbuiltin-dirs)
- $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(vmlinux-dirs)) > $@
+ $(Q)$(AWK) '!x[$$0]++' $(addsuffix /$@, $(build-dirs)) > $@
PHONY += $(modbuiltin-dirs)
# tristate.conf is not included from this Makefile. Add it as a prerequisite
@@ -1377,12 +1382,14 @@ CLEAN_FILES += modules.builtin.modinfo
# Directories & files removed with 'make mrproper'
MRPROPER_DIRS += include/config include/generated \
- arch/$(SRCARCH)/include/generated .tmp_objdiff
+ arch/$(SRCARCH)/include/generated .tmp_objdiff \
+ debian/ snap/ tar-install/
MRPROPER_FILES += .config .config.old .version \
Module.symvers \
signing_key.pem signing_key.priv signing_key.x509 \
x509.genkey extra_certificates signing_key.x509.keyid \
- signing_key.x509.signer vmlinux-gdb.py
+ signing_key.x509.signer vmlinux-gdb.py \
+ *.spec
# Directories & files removed with 'make distclean'
DISTCLEAN_DIRS +=
@@ -1392,11 +1399,8 @@ DISTCLEAN_FILES += tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
#
clean: rm-dirs := $(CLEAN_DIRS)
clean: rm-files := $(CLEAN_FILES)
-clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs))
-PHONY += $(clean-dirs) clean archclean vmlinuxclean
-$(clean-dirs):
- $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
+PHONY += archclean vmlinuxclean
vmlinuxclean:
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean
@@ -1437,13 +1441,11 @@ distclean: mrproper
# Packaging of the kernel to various formats
# ---------------------------------------------------------------------------
-package-dir := scripts/package
%src-pkg: FORCE
- $(Q)$(MAKE) $(build)=$(package-dir) $@
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
%pkg: include/config/kernel.release FORCE
- $(Q)$(MAKE) $(build)=$(package-dir) $@
-
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@
# Brief documentation of the typical targets used
# ---------------------------------------------------------------------------
@@ -1496,6 +1498,9 @@ help:
@echo ' headerdep - Detect inclusion cycles in headers'
@echo ' coccicheck - Check with Coccinelle'
@echo ''
+ @echo 'Tools:'
+ @echo ' nsdeps - Generate missing symbol namespace dependencies'
+ @echo ''
@echo 'Kernel selftest:'
@echo ' kselftest - Build and run kernel selftest (run as root)'
@echo ' Build, install, and boot kernel before'
@@ -1506,8 +1511,10 @@ help:
@echo ''
@$(if $(dtstree), \
echo 'Devicetree:'; \
- echo '* dtbs - Build device tree blobs for enabled boards'; \
- echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
+ echo '* dtbs - Build device tree blobs for enabled boards'; \
+ echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \
+ echo ' dt_binding_check - Validate device tree binding documents'; \
+ echo ' dtbs_check - Validate device tree source files';\
echo '')
@echo 'Userspace tools targets:'
@@ -1515,7 +1522,7 @@ help:
@echo ' or "cd tools; make help"'
@echo ''
@echo 'Kernel packaging:'
- @$(MAKE) $(build)=$(package-dir) help
+ @$(MAKE) -f $(srctree)/scripts/Makefile.package help
@echo ''
@echo 'Documentation targets:'
@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
@@ -1540,7 +1547,7 @@ help:
@echo ' make C=1 [targets] Check re-compiled c source with $$CHECK (sparse by default)'
@echo ' make C=2 [targets] Force check of all c source with $$CHECK'
@echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
- @echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
+ @echo ' make W=n [targets] Enable extra build checks, n=1,2,3 where'
@echo ' 1: warnings which may be relevant and do not occur too often'
@echo ' 2: warnings which occur quite often but may still be relevant'
@echo ' 3: more obscure warnings, can most likely be ignored'
@@ -1569,7 +1576,7 @@ $(help-board-dirs): help-%:
DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \
linkcheckdocs dochelp refcheckdocs
PHONY += $(DOC_TARGETS)
-$(DOC_TARGETS): scripts_basic FORCE
+$(DOC_TARGETS):
$(Q)$(MAKE) $(build)=Documentation $@
# Misc
@@ -1614,13 +1621,9 @@ $(objtree)/Module.symvers:
echo " is missing; modules will have no dependencies and modversions."; \
echo )
-module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
-PHONY += $(module-dirs) modules
-$(module-dirs): prepare $(objtree)/Module.symvers
- $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) need-modorder=1
-
-modules: $(module-dirs)
- @$(kecho) ' Building modules, stage 2.';
+build-dirs := $(KBUILD_EXTMOD)
+PHONY += modules
+modules: descend $(objtree)/Module.symvers
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
PHONY += modules_install
@@ -1636,14 +1639,13 @@ PHONY += _emodinst_post
_emodinst_post: _emodinst_
$(call cmd,depmod)
-clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
-
-PHONY += $(clean-dirs) clean
-$(clean-dirs):
- $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
-
+clean-dirs := $(KBUILD_EXTMOD)
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers
+PHONY += /
+/:
+ @echo >&2 '"$(MAKE) /" is no longer supported. Please use "$(MAKE) ./" instead.'
+
PHONY += help
help:
@echo ' Building external modules.'
@@ -1657,6 +1659,21 @@ help:
PHONY += prepare
endif # KBUILD_EXTMOD
+# Handle descending into subdirectories listed in $(build-dirs)
+# Preset locale variables to speed up the build process. Limit locale
+# tweaks to this spot to avoid wrong language settings when running
+# make menuconfig etc.
+# Error messages still appears in the original language
+PHONY += descend $(build-dirs)
+descend: $(build-dirs)
+$(build-dirs): prepare
+ $(Q)$(MAKE) $(build)=$@ single-build=$(single-build) need-builtin=1 need-modorder=1
+
+clean-dirs := $(addprefix _clean_, $(clean-dirs))
+PHONY += $(clean-dirs) clean
+$(clean-dirs):
+ $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
+
clean: $(clean-dirs)
$(call cmd,rmdirs)
$(call cmd,rmfiles)
@@ -1665,7 +1682,7 @@ clean: $(clean-dirs)
-o -name '*.ko.*' \
-o -name '*.dtb' -o -name '*.dtb.S' -o -name '*.dt.yaml' \
-o -name '*.dwo' -o -name '*.lst' \
- -o -name '*.su' -o -name '*.mod' \
+ -o -name '*.su' -o -name '*.mod' -o -name '*.ns_deps' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
-o -name '*.lex.c' -o -name '*.tab.[ch]' \
-o -name '*.asn1.[ch]' \
@@ -1678,11 +1695,20 @@ clean: $(clean-dirs)
# Generate tags for editors
# ---------------------------------------------------------------------------
quiet_cmd_tags = GEN $@
- cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@
+ cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@
tags TAGS cscope gtags: FORCE
$(call cmd,tags)
+# Script to generate missing namespace dependencies
+# ---------------------------------------------------------------------------
+
+PHONY += nsdeps
+
+nsdeps: modules
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost nsdeps
+ $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
+
# Scripts to check various things for consistency
# ---------------------------------------------------------------------------
@@ -1699,7 +1725,7 @@ versioncheck:
| xargs $(PERL) -w $(srctree)/scripts/checkversion.pl
coccicheck:
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@
+ $(Q)$(BASH) $(srctree)/scripts/$@
namespacecheck:
$(PERL) $(srctree)/scripts/namespace.pl
@@ -1747,36 +1773,47 @@ tools/%: FORCE
# Single targets
# ---------------------------------------------------------------------------
-# Single targets are compatible with:
-# - build with mixed source and output
-# - build with separate output dir 'make O=...'
-# - external modules
+# To build individual files in subdirectories, you can do like this:
+#
+# make foo/bar/baz.s
#
-# target-dir => where to store outputfile
-# build-dir => directory in kernel source tree to use
-
-build-target = $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD)/)$@
-build-dir = $(patsubst %/,%,$(dir $(build-target)))
-
-%.i: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.ll: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.lst: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.o: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.s: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
-%.symtypes: prepare FORCE
- $(Q)$(MAKE) $(build)=$(build-dir) $(build-target)
+# The supported suffixes for single-target are listed in 'single-targets'
+#
+# To build only under specific subdirectories, you can do like this:
+#
+# make foo/bar/baz/
-# Modules
-PHONY += /
-/: ./
+ifdef single-build
+
+single-all := $(filter $(single-targets), $(MAKECMDGOALS))
+
+# .ko is special because modpost is needed
+single-ko := $(sort $(filter %.ko, $(single-all)))
+single-no-ko := $(sort $(patsubst %.ko,%.mod, $(single-all)))
+
+$(single-ko): single_modpost
+ @:
+$(single-no-ko): descend
+ @:
+
+ifeq ($(KBUILD_EXTMOD),)
+# For the single build of in-tree modules, use a temporary file to avoid
+# the situation of modules_install installing an invalid modules.order.
+MODORDER := .modules.tmp
+endif
+
+PHONY += single_modpost
+single_modpost: $(single-no-ko)
+ $(Q){ $(foreach m, $(single-ko), echo $(extmod-prefix)$m;) } > $(MODORDER)
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
+
+KBUILD_MODULES := 1
+
+export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod-prefix), $(single-no-ko))
-%/: prepare FORCE
- $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir)
+single-build = $(if $(filter-out $@/, $(single-no-ko)),1)
+
+endif
# FIXME Should go into a make.lib or something
# ===========================================================================
@@ -1797,9 +1834,9 @@ existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
-endif # ifeq ($(config-targets),1)
-endif # ifeq ($(mixed-targets),1)
-endif # need-sub-make
+endif # config-targets
+endif # mixed-build
+endif # need-sub-make
PHONY += FORCE
FORCE:

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