diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 219 |
1 files changed, 105 insertions, 114 deletions
@@ -15,19 +15,6 @@ NAME = Shy Crocodile PHONY := _all _all: -# Do not use make's built-in rules and variables -# (this increases performance and avoids hard-to-debug behaviour) -MAKEFLAGS += -rR - -# Avoid funny character set dependencies -unexport LC_ALL -LC_COLLATE=C -LC_NUMERIC=C -export LC_COLLATE LC_NUMERIC - -# Avoid interference with shell env settings -unexport GREP_OPTIONS - # We are using a recursive build, so we need to do a little thinking # to get the ordering right. # @@ -44,6 +31,25 @@ unexport GREP_OPTIONS # descending is started. They are now explicitly listed as the # prepare rule. +ifneq ($(sub-make-done),1) + +# Do not use make's built-in rules and variables +# (this increases performance and avoids hard-to-debug behaviour) +MAKEFLAGS += -rR + +# 'MAKEFLAGS += -rR' does not become immediately effective for old +# GNU Make versions. Cancel implicit rules for this Makefile. +$(lastword $(MAKEFILE_LIST)): ; + +# Avoid funny character set dependencies +unexport LC_ALL +LC_COLLATE=C +LC_NUMERIC=C +export LC_COLLATE LC_NUMERIC + +# Avoid interference with shell env settings +unexport GREP_OPTIONS + # Beautify output # --------------------------------------------------------------------------- # @@ -90,7 +96,6 @@ endif ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) quiet=silent_ - tools_silent=s endif export quiet Q KBUILD_VERBOSE @@ -112,7 +117,6 @@ export quiet Q KBUILD_VERBOSE # 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 ($(KBUILD_SRC),) # OK, Make called in directory where kernel src resides # Do we want to locate output files in a separate directory? @@ -120,9 +124,6 @@ ifeq ("$(origin O)", "command line") KBUILD_OUTPUT := $(O) endif -# Cancel implicit rules on top Makefile -$(CURDIR)/Makefile Makefile: ; - ifneq ($(words $(subst :, ,$(CURDIR))), 1) $(error main directory cannot contain spaces nor colons) endif @@ -142,6 +143,13 @@ $(if $(KBUILD_OUTPUT),, \ # 'sub-make' below. MAKEFLAGS += --include-dir=$(CURDIR) +else + +# Do not print "Entering directory ..." at all for in-tree build. +MAKEFLAGS += --no-print-directory + +endif # ifneq ($(KBUILD_OUTPUT),) + PHONY += $(MAKECMDGOALS) sub-make $(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make @@ -149,16 +157,12 @@ $(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) \ + $(Q)$(MAKE) sub-make-done=1 \ + $(if $(KBUILD_OUTPUT),-C $(KBUILD_OUTPUT) KBUILD_SRC=$(CURDIR)) \ -f $(CURDIR)/Makefile $(filter-out _all sub-make,$(MAKECMDGOALS)) -# Leave processing to above invocation of make -skip-makefile := 1 -endif # ifneq ($(KBUILD_OUTPUT),) -endif # ifeq ($(KBUILD_SRC),) - +else # sub-make-done # We process the rest of the Makefile if this is the final invocation of make -ifeq ($(skip-makefile),) # Do not print "Entering directory ...", # but we want to display it when entering to the output directory @@ -215,7 +219,7 @@ objtree := . src := $(srctree) obj := $(objtree) -VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) +VPATH := $(srctree) export srctree objtree VPATH @@ -300,8 +304,6 @@ __build_one_by_one: else -# We need some generic definitions (do not try to remake the file). -scripts/Kbuild.include: ; include scripts/Kbuild.include # Read KERNELRELEASE from include/config/kernel.release (if it exists) @@ -390,7 +392,6 @@ OBJDUMP = $(CROSS_COMPILE)objdump LEX = flex YACC = bison AWK = awk -GENKSYMS = scripts/genksyms/genksyms INSTALLKERNEL := installkernel DEPMOD = /sbin/depmod PERL = perl @@ -429,7 +430,7 @@ LINUXINCLUDE := \ KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ -fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ - -Werror-implicit-function-declaration -Werror=implicit-int \ + -Werror=implicit-function-declaration -Werror=implicit-int \ -Wno-format-security \ -std=gnu89 KBUILD_CPPFLAGS := -D__KERNEL__ @@ -443,7 +444,7 @@ GCC_PLUGINS_CFLAGS := export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC export CPP AR NM STRIP OBJCOPY OBJDUMP KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS -export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE +export MAKE LEX YACC AWK INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS @@ -476,23 +477,23 @@ scripts_basic: $(Q)$(MAKE) $(build)=scripts/basic $(Q)rm -f .tmp_quiet_recordmcount -# To avoid any implicit rule to kick in, define an empty command. -scripts/basic/%: scripts_basic ; - PHONY += outputmakefile # outputmakefile generates a Makefile in the output directory, if using a # separate output directory. This allows convenient use of make in the # output directory. +# At the same time when output Makefile generated, generate .gitignore to +# ignore whole output directory outputmakefile: ifneq ($(KBUILD_SRC),) $(Q)ln -fsn $(srctree) source $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile $(srctree) + $(Q){ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore endif ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),) ifneq ($(CROSS_COMPILE),) CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%)) -GCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD))) +GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR) GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) endif @@ -624,13 +625,22 @@ ifeq ($(may-sync-config),1) # because some architectures define CROSS_COMPILE there. -include include/config/auto.conf.cmd -# To avoid any implicit rule to kick in, define an empty command -$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ; +$(KCONFIG_CONFIG): + @echo >&2 '***' + @echo >&2 '*** Configuration file "$@" not found!' + @echo >&2 '***' + @echo >&2 '*** Please run some configurator (e.g. "make oldconfig" or' + @echo >&2 '*** "make menuconfig" or "make xconfig").' + @echo >&2 '***' + @/bin/false # The actual configuration files used during the build are stored in # include/generated/ and include/config/. Update them if .config is newer than # include/config/auto.conf (which mirrors .config). -include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd +# +# This exploits the 'multi-target pattern rule' trick. +# 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 # External modules and some install targets need include/generated/autoconf.h @@ -658,17 +668,13 @@ KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) -KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) -else -ifdef CONFIG_PROFILE_ALL_BRANCHES -KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) else KBUILD_CFLAGS += -O2 endif -endif -KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0409, \ - $(call cc-disable-warning,maybe-uninitialized,)) +ifdef CONFIG_CC_DISABLE_WARN_MAYBE_UNINITIALIZED +KBUILD_CFLAGS += -Wno-maybe-uninitialized +endif # Tell gcc to never replace conditional load with a non-conditional one KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) @@ -729,25 +735,28 @@ KBUILD_CFLAGS += -fomit-frame-pointer endif endif -KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) +DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) ifdef CONFIG_DEBUG_INFO ifdef CONFIG_DEBUG_INFO_SPLIT -KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) +DEBUG_CFLAGS += -gsplit-dwarf else -KBUILD_CFLAGS += -g +DEBUG_CFLAGS += -g endif KBUILD_AFLAGS += -Wa,-gdwarf-2 endif ifdef CONFIG_DEBUG_INFO_DWARF4 -KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) +DEBUG_CFLAGS += -gdwarf-4 endif ifdef CONFIG_DEBUG_INFO_REDUCED -KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ +DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ $(call cc-option,-fno-var-tracking) endif +KBUILD_CFLAGS += $(DEBUG_CFLAGS) +export DEBUG_CFLAGS + ifdef CONFIG_FUNCTION_TRACER ifdef CONFIG_FTRACE_MCOUNT_RECORD # gcc 5 supports generating the mcount tables directly @@ -922,19 +931,6 @@ ifdef CONFIG_MODULE_COMPRESS endif # CONFIG_MODULE_COMPRESS export mod_compress_cmd -# Select initial ramdisk compression format, default is gzip(1). -# This shall be used by the dracut(8) tool while creating an initramfs image. -# -INITRD_COMPRESS-y := gzip -INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2 -INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma -INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz -INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo -INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4 -# do not export INITRD_COMPRESS, since we didn't actually -# choose a sane default compression above. -# export INITRD_COMPRESS := $(INITRD_COMPRESS-y) - ifdef CONFIG_MODULE_SIG_ALL $(eval $(call config_filename,MODULE_SIG_KEY)) @@ -976,15 +972,15 @@ libs-y2 := $(patsubst %/, %/built-in.a, $(filter-out %.a, $(libs-y))) virt-y := $(patsubst %/, %/built-in.a, $(virt-y)) # Externally visible symbols (used by link-vmlinux.sh) -export KBUILD_VMLINUX_INIT := $(head-y) $(init-y) -export KBUILD_VMLINUX_MAIN := $(core-y) $(libs-y2) $(drivers-y) $(net-y) $(virt-y) +export KBUILD_VMLINUX_OBJS := $(head-y) $(init-y) $(core-y) $(libs-y2) \ + $(drivers-y) $(net-y) $(virt-y) export KBUILD_VMLINUX_LIBS := $(libs-y1) export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds export LDFLAGS_vmlinux # used by scripts/package/Makefile export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) arch Documentation include samples scripts tools) -vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_INIT) $(KBUILD_VMLINUX_MAIN) $(KBUILD_VMLINUX_LIBS) +vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) # Recurse until adjust_autoksyms.sh is satisfied PHONY += autoksyms_recursive @@ -1015,9 +1011,6 @@ cmd_link-vmlinux = \ $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE -ifdef CONFIG_GDB_SCRIPTS - $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) -endif +$(call if_changed,link-vmlinux) targets := vmlinux @@ -1062,7 +1055,7 @@ 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 prepare1 prepare2 prepare3 +PHONY += prepare archprepare prepare1 prepare3 # prepare3 is used to check if we are building in a separate output directory, # and if so do: @@ -1077,12 +1070,8 @@ ifneq ($(KBUILD_SRC),) fi; endif -# prepare2 creates a makefile if using a separate output directory. -# From this point forward, .config has been reprocessed, so any rules -# that need to depend on updated CONFIG_* values can be checked here. -prepare2: prepare3 outputmakefile asm-generic - -prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h +prepare1: prepare3 outputmakefile asm-generic $(version_h) $(autoksyms_h) \ + include/generated/utsrelease.h $(cmd_crmodverdir) archprepare: archheaders archscripts prepare1 scripts @@ -1517,6 +1506,18 @@ PHONY += $(DOC_TARGETS) $(DOC_TARGETS): scripts_basic FORCE $(Q)$(MAKE) $(build)=Documentation $@ +# Misc +# --------------------------------------------------------------------------- + +PHONY += scripts_gdb +scripts_gdb: prepare + $(Q)$(MAKE) $(build)=scripts/gdb + $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) + +ifdef CONFIG_GDB_SCRIPTS +all: scripts_gdb +endif + else # KBUILD_EXTMOD ### @@ -1668,6 +1669,11 @@ image_name: @echo $(KBUILD_IMAGE) # Clear a bunch of variables before executing the submake + +ifeq ($(quiet),silent_) +tools_silent=s +endif + tools/: FORCE $(Q)mkdir -p $(objtree)/tools $(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(src)/tools/ @@ -1686,45 +1692,32 @@ tools/%: FORCE # target-dir => where to store outputfile # build-dir => directory in kernel source tree to use -ifeq ($(KBUILD_EXTMOD),) - build-dir = $(patsubst %/,%,$(dir $@)) - target-dir = $(dir $@) -else - zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@))) - build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash)) - target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@)) -endif - -%.s: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.i: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.o: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.lst: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.s: %.S prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.o: %.S prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.symtypes: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) -%.ll: %.c prepare FORCE - $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +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) +%.ko: %.o + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost # Modules -/: prepare FORCE - $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ - $(build)=$(build-dir) +PHONY += / +/: ./ + # Make sure the latest headers are built for Documentation Documentation/ samples/: headers_install %/: prepare FORCE - $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ - $(build)=$(build-dir) -%.ko: prepare FORCE - $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ - $(build)=$(build-dir) $(@:.ko=.o) - $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost + $(Q)$(MAKE) KBUILD_MODULES=1 $(build)=$(build-dir) # FIXME Should go into a make.lib or something # =========================================================================== @@ -1748,13 +1741,11 @@ cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ # read saved command lines for existing targets existing-targets := $(wildcard $(sort $(targets))) -cmd_files := $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) -$(cmd_files): ; # Do not try to update included dependency files --include $(cmd_files) +-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) endif # ifeq ($(config-targets),1) endif # ifeq ($(mixed-targets),1) -endif # skip-makefile +endif # sub-make-done PHONY += FORCE FORCE: |