| # SPDX-License-Identifier: GPL-2.0 |
| VERSION = 4 |
| PATCHLEVEL = 19 |
| SUBLEVEL = 164 |
| EXTRAVERSION = |
| NAME = "People's Front" |
| |
| # *DOCUMENTATION* |
| # To see a list of typical targets execute "make help" |
| # More info can be located in ./README |
| # Comments in this file are targeted only to the developer, do not |
| # expect to learn how to build the kernel reading this file. |
| |
| # That's our default target when none is given on the command line |
| PHONY := _all |
| _all: |
| |
| # o Do not use make's built-in rules and variables |
| # (this increases performance and avoids hard-to-debug behaviour); |
| # o Look for make include files relative to root of kernel src |
| MAKEFLAGS += -rR --include-dir=$(CURDIR) |
| |
| # 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. |
| # |
| # Most importantly: sub-Makefiles should only ever modify files in |
| # their own directory. If in some directory we have a dependency on |
| # a file in another dir (which doesn't happen often, but it's often |
| # unavoidable when linking the built-in.a targets which finally |
| # turn into vmlinux), we will call a sub make in that other dir, and |
| # after that we are sure that everything which is in that other dir |
| # is now up to date. |
| # |
| # The only cases where we need to modify files which have global |
| # effects are thus separated out and done before the recursive |
| # descending is started. They are now explicitly listed as the |
| # prepare rule. |
| |
| # Beautify output |
| # --------------------------------------------------------------------------- |
| # |
| # Normally, we echo the whole command before executing it. By making |
| # that echo $($(quiet)$(cmd)), we now have the possibility to set |
| # $(quiet) to choose other forms of output instead, e.g. |
| # |
| # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
| # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
| # |
| # If $(quiet) is empty, the whole command will be printed. |
| # If it is set to "quiet_", only the short version will be printed. |
| # If it is set to "silent_", nothing will be printed at all, since |
| # the variable $(silent_cmd_cc_o_c) doesn't exist. |
| # |
| # A simple variant is to prefix commands with $(Q) - that's useful |
| # for commands that shall be hidden in non-verbose mode. |
| # |
| # $(Q)ln $@ :< |
| # |
| # If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
| # If KBUILD_VERBOSE equals 1 then the above command is displayed. |
| # |
| # To put more focus on warnings, be less verbose as default |
| # Use 'make V=1' to see the full commands |
| |
| ifeq ("$(origin V)", "command line") |
| KBUILD_VERBOSE = $(V) |
| endif |
| ifndef KBUILD_VERBOSE |
| KBUILD_VERBOSE = 0 |
| endif |
| |
| ifeq ($(KBUILD_VERBOSE),1) |
| quiet = |
| Q = |
| else |
| quiet=quiet_ |
| Q = @ |
| endif |
| |
| # If the user is running make -s (silent mode), suppress echoing of |
| # commands |
| |
| ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
| quiet=silent_ |
| tools_silent=s |
| endif |
| |
| export quiet Q KBUILD_VERBOSE |
| |
| # kbuild supports saving output files in a separate directory. |
| # To locate output files in a separate directory two syntaxes are supported. |
| # In both cases the working directory must be the root of the kernel src. |
| # 1) O= |
| # Use "make O=dir/to/store/output/files/" |
| # |
| # 2) Set KBUILD_OUTPUT |
| # Set the environment variable KBUILD_OUTPUT to point to the directory |
| # where the output files shall be placed. |
| # export KBUILD_OUTPUT=dir/to/store/output/files/ |
| # make |
| # |
| # The O= assignment takes precedence over the KBUILD_OUTPUT environment |
| # variable. |
| |
| # KBUILD_SRC is not intended to be used by the regular user (for now), |
| # it is set on invocation of make with KBUILD_OUTPUT or O= specified. |
| ifeq ($(KBUILD_SRC),) |
| |
| # OK, Make called in directory where kernel src resides |
| # Do we want to locate output files in a separate directory? |
| ifeq ("$(origin O)", "command line") |
| KBUILD_OUTPUT := $(O) |
| endif |
| |
| # Cancel implicit rules on top Makefile |
| $(CURDIR)/Makefile Makefile: ; |
| |
| ifneq ($(words $(subst :, ,$(CURDIR))), 1) |
| $(error main directory cannot contain spaces nor colons) |
| endif |
| |
| ifneq ($(KBUILD_OUTPUT),) |
| # check that the output directory actually exists |
| saved-output := $(KBUILD_OUTPUT) |
| KBUILD_OUTPUT := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) \ |
| && pwd) |
| $(if $(KBUILD_OUTPUT),, \ |
| $(error failed to create output directory "$(saved-output)")) |
| |
| 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)) |
| |
| # Leave processing to above invocation of make |
| skip-makefile := 1 |
| endif # ifneq ($(KBUILD_OUTPUT),) |
| endif # ifeq ($(KBUILD_SRC),) |
| |
| # We process the rest of the Makefile if this is the final invocation of make |
| ifeq ($(skip-makefile),) |
| |
| # Do not print "Entering directory ...", |
| # but we want to display it when entering to the output directory |
| # so that IDEs/editors are able to understand relative filenames. |
| MAKEFLAGS += --no-print-directory |
| |
| # Call a source code checker (by default, "sparse") as part of the |
| # C compilation. |
| # |
| # Use 'make C=1' to enable checking of only re-compiled files. |
| # Use 'make C=2' to enable checking of *all* source files, regardless |
| # of whether they are re-compiled or not. |
| # |
| # See the file "Documentation/dev-tools/sparse.rst" for more details, |
| # including where to get the "sparse" utility. |
| |
| ifeq ("$(origin C)", "command line") |
| KBUILD_CHECKSRC = $(C) |
| endif |
| ifndef KBUILD_CHECKSRC |
| KBUILD_CHECKSRC = 0 |
| endif |
| |
| # Use make M=dir to specify directory of external module to build |
| # Old syntax make ... SUBDIRS=$PWD is still supported |
| # Setting the environment variable KBUILD_EXTMOD take precedence |
| ifdef SUBDIRS |
| KBUILD_EXTMOD ?= $(SUBDIRS) |
| endif |
| |
| ifeq ("$(origin M)", "command line") |
| KBUILD_EXTMOD := $(M) |
| endif |
| |
| ifeq ($(KBUILD_SRC),) |
| # building in the source tree |
| srctree := . |
| else |
| ifeq ($(KBUILD_SRC)/,$(dir $(CURDIR))) |
| # building in a subdirectory of the source tree |
| srctree := .. |
| else |
| srctree := $(KBUILD_SRC) |
| endif |
| endif |
| |
| export KBUILD_CHECKSRC KBUILD_EXTMOD KBUILD_SRC |
| |
| objtree := . |
| src := $(srctree) |
| obj := $(objtree) |
| |
| VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD)) |
| |
| export srctree objtree VPATH |
| |
| # To make sure we do not include .config for any of the *config targets |
| # catch them early, and hand them over to scripts/kconfig/Makefile |
| # It is allowed to specify more targets when calling make, including |
| # mixing *config targets and build targets. |
| # For example 'make oldconfig all'. |
| # Detect when mixed targets is specified, and make a second invocation |
| # of make so .config is not included in this case either (for *config). |
| |
| version_h := include/generated/uapi/linux/version.h |
| old_version_h := include/linux/version.h |
| |
| clean-targets := %clean mrproper cleandocs |
| no-dot-config-targets := $(clean-targets) \ |
| cscope gtags TAGS tags help% %docs check% coccicheck \ |
| $(version_h) headers_% archheaders archscripts \ |
| %asm-generic kernelversion %src-pkg |
| no-sync-config-targets := $(no-dot-config-targets) install %install \ |
| kernelrelease |
| |
| config-targets := 0 |
| mixed-targets := 0 |
| dot-config := 1 |
| may-sync-config := 1 |
| |
| ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
| dot-config := 0 |
| endif |
| endif |
| |
| ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) |
| may-sync-config := 0 |
| endif |
| endif |
| |
| ifneq ($(KBUILD_EXTMOD),) |
| may-sync-config := 0 |
| endif |
| |
| ifeq ($(KBUILD_EXTMOD),) |
| ifneq ($(filter config %config,$(MAKECMDGOALS)),) |
| config-targets := 1 |
| ifneq ($(words $(MAKECMDGOALS)),1) |
| mixed-targets := 1 |
| endif |
| endif |
| endif |
| |
| # For "make -j clean all", "make -j mrproper defconfig all", etc. |
| ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) |
| ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) |
| mixed-targets := 1 |
| 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 |
| endif |
| endif |
| |
| ifeq ($(mixed-targets),1) |
| # =========================================================================== |
| # We're called with mixed targets (*config and build targets). |
| # Handle them one by one. |
| |
| PHONY += $(MAKECMDGOALS) __build_one_by_one |
| |
| $(filter-out __build_one_by_one, $(MAKECMDGOALS)): __build_one_by_one |
| @: |
| |
| __build_one_by_one: |
| $(Q)set -e; \ |
| for i in $(MAKECMDGOALS); do \ |
| $(MAKE) -f $(srctree)/Makefile $$i; \ |
| done |
| |
| 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) |
| KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) |
| KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
| export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
| |
| include scripts/subarch.include |
| |
| # Cross compiling and selecting different set of gcc/bin-utils |
| # --------------------------------------------------------------------------- |
| # |
| # When performing cross compilation for other architectures ARCH shall be set |
| # to the target architecture. (See arch/* for the possibilities). |
| # ARCH can be set during invocation of make: |
| # make ARCH=ia64 |
| # Another way is to have ARCH set in the environment. |
| # The default ARCH is the host where make is executed. |
| |
| # CROSS_COMPILE specify the prefix used for all executables used |
| # during compilation. Only gcc and related bin-utils executables |
| # are prefixed with $(CROSS_COMPILE). |
| # CROSS_COMPILE can be set on the command line |
| # make CROSS_COMPILE=ia64-linux- |
| # Alternatively CROSS_COMPILE can be set in the environment. |
| # Default value for CROSS_COMPILE is not to prefix executables |
| # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
| ARCH ?= $(SUBARCH) |
| |
| # Architecture as present in compile.h |
| UTS_MACHINE := $(ARCH) |
| SRCARCH := $(ARCH) |
| |
| # Additional ARCH settings for x86 |
| ifeq ($(ARCH),i386) |
| SRCARCH := x86 |
| endif |
| ifeq ($(ARCH),x86_64) |
| SRCARCH := x86 |
| endif |
| |
| # Additional ARCH settings for sparc |
| ifeq ($(ARCH),sparc32) |
| SRCARCH := sparc |
| endif |
| ifeq ($(ARCH),sparc64) |
| SRCARCH := sparc |
| endif |
| |
| # Additional ARCH settings for sh |
| ifeq ($(ARCH),sh64) |
| SRCARCH := sh |
| endif |
| |
| 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) |
| |
| HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
| HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) |
| HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) |
| |
| ifneq ($(LLVM),) |
| HOSTCC = clang |
| HOSTCXX = clang++ |
| else |
| HOSTCC = gcc |
| HOSTCXX = g++ |
| endif |
| KBUILD_HOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 \ |
| -fomit-frame-pointer -std=gnu89 $(HOST_LFS_CFLAGS) \ |
| $(HOSTCFLAGS) |
| KBUILD_HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) |
| KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) |
| KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) |
| |
| # Make variables (CC, etc...) |
| CPP = $(CC) -E |
| ifneq ($(LLVM),) |
| CC = clang |
| LD = ld.lld |
| AR = llvm-ar |
| NM = llvm-nm |
| OBJCOPY = llvm-objcopy |
| OBJDUMP = llvm-objdump |
| READELF = llvm-readelf |
| OBJSIZE = llvm-size |
| STRIP = llvm-strip |
| else |
| CC = $(CROSS_COMPILE)gcc |
| LD = $(CROSS_COMPILE)ld |
| AR = $(CROSS_COMPILE)ar |
| NM = $(CROSS_COMPILE)nm |
| OBJCOPY = $(CROSS_COMPILE)objcopy |
| OBJDUMP = $(CROSS_COMPILE)objdump |
| READELF = $(CROSS_COMPILE)readelf |
| OBJSIZE = $(CROSS_COMPILE)size |
| STRIP = $(CROSS_COMPILE)strip |
| endif |
| LEX = flex |
| YACC = bison |
| AWK = awk |
| GENKSYMS = scripts/genksyms/genksyms |
| INSTALLKERNEL := installkernel |
| DEPMOD = /sbin/depmod |
| PERL = perl |
| PYTHON = python |
| PYTHON2 = python2 |
| PYTHON3 = python3 |
| CHECK = sparse |
| |
| CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
| -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
| NOSTDINC_FLAGS = |
| CFLAGS_MODULE = |
| AFLAGS_MODULE = |
| LDFLAGS_MODULE = |
| CFLAGS_KERNEL = |
| AFLAGS_KERNEL = |
| LDFLAGS_vmlinux = |
| |
| # Use USERINCLUDE when you must reference the UAPI directories only. |
| USERINCLUDE := \ |
| -I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
| -I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ |
| -I$(srctree)/include/uapi \ |
| -I$(objtree)/include/generated/uapi \ |
| -include $(srctree)/include/linux/kconfig.h |
| |
| # Use LINUXINCLUDE when you must reference the include/ directory. |
| # Needed to be compatible with the O= option |
| LINUXINCLUDE := \ |
| -I$(srctree)/arch/$(SRCARCH)/include \ |
| -I$(objtree)/arch/$(SRCARCH)/include/generated \ |
| $(if $(KBUILD_SRC), -I$(srctree)/include) \ |
| -I$(objtree)/include \ |
| $(USERINCLUDE) |
| |
| KBUILD_AFLAGS := -D__ASSEMBLY__ |
| KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
| -fno-strict-aliasing -fno-common -fshort-wchar \ |
| -Werror-implicit-function-declaration \ |
| -Wno-format-security \ |
| -std=gnu89 |
| KBUILD_CPPFLAGS := -D__KERNEL__ |
| 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 := |
| GCC_PLUGINS_CFLAGS := |
| CLANG_FLAGS := |
| |
| export ARCH SRCARCH CONFIG_SHELL HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC |
| export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS |
| export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON PYTHON2 PYTHON3 UTS_MACHINE |
| export HOSTCXX KBUILD_HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS |
| |
| export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
| export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
| export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN |
| export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
| export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
| export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
| export KBUILD_ARFLAGS |
| |
| # When compiling out-of-tree modules, put MODVERDIR in the module |
| # tree rather than in the kernel tree. The kernel tree might |
| # even be read-only. |
| export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions |
| |
| # Files to ignore in find ... statements |
| |
| export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
| -name CVS -o -name .pc -o -name .hg -o -name .git \) \ |
| -prune -o |
| export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
| --exclude CVS --exclude .pc --exclude .hg --exclude .git |
| |
| # =========================================================================== |
| # Rules shared between *config targets and build targets |
| |
| # Basic helpers built in scripts/basic/ |
| PHONY += scripts_basic |
| scripts_basic: |
| $(Q)$(MAKE) $(build)=scripts/basic |
| $(Q)rm -f .tmp_quiet_recordmcount |
| |
| # To avoid any implicit rule to kick in, define an empty command. |
| scripts/basic/%: scripts_basic ; |
| |
| PHONY += outputmakefile |
| # outputmakefile generates a Makefile in the output directory, if using a |
| # separate output directory. This allows convenient use of make in the |
| # output directory. |
| outputmakefile: |
| ifneq ($(KBUILD_SRC),) |
| $(Q)ln -fsn $(srctree) source |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ |
| $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) |
| endif |
| |
| ifeq ($(cc-name),clang) |
| ifneq ($(CROSS_COMPILE),) |
| CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) |
| GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
| CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) |
| GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..) |
| endif |
| ifneq ($(GCC_TOOLCHAIN),) |
| CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN) |
| endif |
| ifneq ($(LLVM_IAS),1) |
| CLANG_FLAGS += -no-integrated-as |
| endif |
| CLANG_FLAGS += -Werror=unknown-warning-option |
| KBUILD_CFLAGS += $(CLANG_FLAGS) |
| KBUILD_AFLAGS += $(CLANG_FLAGS) |
| export CLANG_FLAGS |
| endif |
| |
| RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register |
| RETPOLINE_VDSO_CFLAGS_GCC := -mindirect-branch=thunk-inline -mindirect-branch-register |
| RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk |
| RETPOLINE_VDSO_CFLAGS_CLANG := -mretpoline |
| RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG))) |
| RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_VDSO_CFLAGS_CLANG))) |
| export RETPOLINE_CFLAGS |
| export RETPOLINE_VDSO_CFLAGS |
| |
| KBUILD_CFLAGS += $(call cc-option,-fno-PIE) |
| KBUILD_AFLAGS += $(call cc-option,-fno-PIE) |
| |
| # The expansion should be delayed until arch/$(SRCARCH)/Makefile is included. |
| # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile. |
| # CC_VERSION_TEXT is referenced from Kconfig (so it needs export), |
| # and from include/config/auto.conf.cmd to detect the compiler upgrade. |
| CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1) |
| |
| ifeq ($(config-targets),1) |
| # =========================================================================== |
| # *config targets only - make sure prerequisites are updated, and descend |
| # in scripts/kconfig to make the *config target |
| |
| # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. |
| # KBUILD_DEFCONFIG may point out an alternative default configuration |
| # used for 'make defconfig' |
| include arch/$(SRCARCH)/Makefile |
| export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
| |
| config: scripts_basic outputmakefile FORCE |
| $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| |
| %config: scripts_basic outputmakefile FORCE |
| $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
| |
| else |
| # =========================================================================== |
| # Build targets only - this includes vmlinux, arch specific targets, clean |
| # targets and others. In general all targets except *config targets. |
| |
| # If building an external module we do not care about the all: rule |
| # but instead _all depend on modules |
| PHONY += all |
| ifeq ($(KBUILD_EXTMOD),) |
| _all: all |
| else |
| _all: modules |
| endif |
| |
| # Decide whether to build built-in, modular, or both. |
| # Normally, just do built-in. |
| |
| KBUILD_MODULES := |
| KBUILD_BUILTIN := 1 |
| |
| # If we have only "make modules", don't compile built-in objects. |
| ifeq ($(MAKECMDGOALS),modules) |
| KBUILD_BUILTIN := |
| endif |
| |
| # If we have "make <whatever> modules", compile modules |
| # in addition to whatever we do anyway. |
| # Just "make" or "make all" shall build modules as well |
| |
| ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) |
| KBUILD_MODULES := 1 |
| endif |
| |
| ifeq ($(MAKECMDGOALS),) |
| KBUILD_MODULES := 1 |
| endif |
| |
| export KBUILD_MODULES KBUILD_BUILTIN |
| |
| ifeq ($(KBUILD_EXTMOD),) |
| # Objects we will link into vmlinux / subdirs we need to visit |
| init-y := init/ |
| drivers-y := drivers/ sound/ firmware/ |
| net-y := net/ |
| libs-y := lib/ |
| core-y := usr/ |
| virt-y := virt/ |
| endif # KBUILD_EXTMOD |
| |
| ifeq ($(dot-config),1) |
| include include/config/auto.conf |
| endif |
| |
| # The all: target is the default when no target is given on the |
| # command line. |
| # This allow a user to issue only 'make' to build a kernel including modules |
| # Defaults to vmlinux, but the arch makefile usually adds further targets |
| all: vmlinux |
| |
| CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \ |
| $(call cc-option,-fno-tree-loop-im) \ |
| $(call cc-disable-warning,maybe-uninitialized,) |
| export CFLAGS_GCOV |
| |
| # The arch Makefiles can override CC_FLAGS_FTRACE. We may also append it later. |
| ifdef CONFIG_FUNCTION_TRACER |
| CC_FLAGS_FTRACE := -pg |
| endif |
| |
| # Make toolchain changes before including arch/$(SRCARCH)/Makefile to ensure |
| # ar/cc/ld-* macros return correct values. |
| ifdef CONFIG_LTO_CLANG |
| # use llvm-ar for building symbol tables from IR files, and llvm-nm instead |
| # of objdump for processing symbol versions and exports |
| LLVM_AR := llvm-ar |
| LLVM_NM := llvm-nm |
| export LLVM_AR LLVM_NM |
| endif |
| |
| # 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 ($(may-sync-config),1) |
| # Read in dependencies to all Kconfig* files, make sure to run syncconfig if |
| # changes are detected. This should be included after arch/$(SRCARCH)/Makefile |
| # because some architectures define CROSS_COMPILE there. |
| include include/config/auto.conf.cmd |
| |
| # To avoid any implicit rule to kick in, define an empty command |
| $(KCONFIG_CONFIG): ; |
| |
| # 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). |
| # |
| # 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 |
| # and include/config/auto.conf but do not care if they are up-to-date. |
| # Use auto.conf to trigger the test |
| PHONY += include/config/auto.conf |
| |
| include/config/auto.conf: |
| $(Q)test -e include/generated/autoconf.h -a -e $@ || ( \ |
| echo >&2; \ |
| echo >&2 " ERROR: Kernel configuration is invalid."; \ |
| echo >&2 " include/generated/autoconf.h or $@ are missing.";\ |
| echo >&2 " Run 'make oldconfig && make prepare' on kernel src to fix it."; \ |
| echo >&2 ; \ |
| /bin/false) |
| |
| endif # may-sync-config |
| endif # $(dot-config) |
| |
| KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,) |
| KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) |
| KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) |
| KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) |
| KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) |
| KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
| |
| ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE |
| KBUILD_CFLAGS += -Os |
| else |
| KBUILD_CFLAGS += -O2 |
| endif |
| |
| # Tell gcc to never replace conditional load with a non-conditional one |
| KBUILD_CFLAGS += $(call cc-option,--param=allow-store-data-races=0) |
| KBUILD_CFLAGS += $(call cc-option,-fno-allow-store-data-races) |
| |
| # check for 'asm goto' |
| ifeq ($(call shell-cached,$(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y) |
| KBUILD_CFLAGS += -DCC_HAVE_ASM_GOTO |
| KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO |
| endif |
| |
| include scripts/Makefile.kcov |
| include scripts/Makefile.gcc-plugins |
| |
| ifdef CONFIG_READABLE_ASM |
| # Disable optimizations that make assembler listings hard to read. |
| # reorder blocks reorders the control in the function |
| # ipa clone creates specialized cloned functions |
| # partial inlining inlines only parts of functions |
| KBUILD_CFLAGS += $(call cc-option,-fno-reorder-blocks,) \ |
| $(call cc-option,-fno-ipa-cp-clone,) \ |
| $(call cc-option,-fno-partial-inlining) |
| endif |
| |
| ifneq ($(CONFIG_FRAME_WARN),0) |
| KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN}) |
| endif |
| |
| stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector |
| stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
| stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong |
| |
| KBUILD_CFLAGS += $(stackp-flags-y) |
| |
| ifeq ($(cc-name),clang) |
| KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) |
| KBUILD_CFLAGS += $(call cc-disable-warning, format-invalid-specifier) |
| KBUILD_CFLAGS += $(call cc-disable-warning, gnu) |
| # 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) |
| 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) |
| endif |
| |
| KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) |
| ifdef CONFIG_FRAME_POINTER |
| KBUILD_CFLAGS += -fno-omit-frame-pointer -fno-optimize-sibling-calls |
| else |
| # Some targets (ARM with Thumb2, for example), can't be built with frame |
| # pointers. For those, we don't have FUNCTION_TRACER automatically |
| # select FRAME_POINTER. However, FUNCTION_TRACER adds -pg, and this is |
| # incompatible with -fomit-frame-pointer with current GCC, so we don't use |
| # -fomit-frame-pointer with FUNCTION_TRACER. |
| ifndef CONFIG_FUNCTION_TRACER |
| KBUILD_CFLAGS += -fomit-frame-pointer |
| endif |
| endif |
| |
| # Initialize all stack variables with a 0xAA pattern. |
| ifdef CONFIG_INIT_STACK_ALL_PATTERN |
| KBUILD_CFLAGS += -ftrivial-auto-var-init=pattern |
| endif |
| |
| # Initialize all stack variables with a zero value. |
| ifdef CONFIG_INIT_STACK_ALL_ZERO |
| # Future support for zero initialization is still being debated, see |
| # https://bugs.llvm.org/show_bug.cgi?id=45497. These flags are subject to being |
| # renamed or dropped. |
| KBUILD_CFLAGS += -ftrivial-auto-var-init=zero |
| KBUILD_CFLAGS += -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang |
| endif |
| |
| KBUILD_CFLAGS += $(call cc-option, -fno-var-tracking-assignments) |
| |
| ifdef CONFIG_DEBUG_INFO |
| ifdef CONFIG_DEBUG_INFO_SPLIT |
| KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) |
| else |
| KBUILD_CFLAGS += -g |
| endif |
| ifneq ($(LLVM_IAS),1) |
| KBUILD_AFLAGS += -Wa,-gdwarf-2 |
| endif |
| endif |
| |
| ifdef CONFIG_DEBUG_INFO_DWARF4 |
| KBUILD_CFLAGS += $(call cc-option, -gdwarf-4,) |
| endif |
| |
| ifdef CONFIG_DEBUG_INFO_REDUCED |
| KBUILD_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
| $(call cc-option,-fno-var-tracking) |
| endif |
| |
| ifdef CONFIG_FUNCTION_TRACER |
| ifdef CONFIG_FTRACE_MCOUNT_RECORD |
| # gcc 5 supports generating the mcount tables directly |
| ifeq ($(call cc-option-yn,-mrecord-mcount),y) |
| CC_FLAGS_FTRACE += -mrecord-mcount |
| export CC_USING_RECORD_MCOUNT := 1 |
| endif |
| ifdef CONFIG_HAVE_NOP_MCOUNT |
| ifeq ($(call cc-option-yn, -mnop-mcount),y) |
| CC_FLAGS_FTRACE += -mnop-mcount |
| CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT |
| endif |
| endif |
| endif |
| ifdef CONFIG_HAVE_FENTRY |
| ifeq ($(call cc-option-yn, -mfentry),y) |
| CC_FLAGS_FTRACE += -mfentry |
| CC_FLAGS_USING += -DCC_USING_FENTRY |
| endif |
| endif |
| export CC_FLAGS_FTRACE |
| KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING) |
| KBUILD_AFLAGS += $(CC_FLAGS_USING) |
| ifdef CONFIG_DYNAMIC_FTRACE |
| ifdef CONFIG_HAVE_C_RECORDMCOUNT |
| BUILD_C_RECORDMCOUNT := y |
| export BUILD_C_RECORDMCOUNT |
| endif |
| endif |
| endif |
| |
| # We trigger additional mismatches with less inlining |
| ifdef CONFIG_DEBUG_SECTION_MISMATCH |
| KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) |
| endif |
| |
| ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION |
| KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections |
| LDFLAGS_vmlinux += --gc-sections |
| endif |
| |
| ifdef CONFIG_LTO_CLANG |
| ifdef CONFIG_THINLTO |
| lto-clang-flags := -flto=thin |
| KBUILD_LDFLAGS += --thinlto-cache-dir=.thinlto-cache |
| else |
| lto-clang-flags := -flto |
| endif |
| lto-clang-flags += -fvisibility=default $(call cc-option, -fsplit-lto-unit) |
| |
| # Limit inlining across translation units to reduce binary size |
| LD_FLAGS_LTO_CLANG := -mllvm -import-instr-limit=5 |
| |
| KBUILD_LDFLAGS += $(LD_FLAGS_LTO_CLANG) |
| KBUILD_LDFLAGS_MODULE += $(LD_FLAGS_LTO_CLANG) |
| |
| KBUILD_LDFLAGS_MODULE += -T scripts/module-lto.lds |
| |
| # allow disabling only clang LTO where needed |
| DISABLE_LTO_CLANG := -fno-lto |
| export DISABLE_LTO_CLANG |
| endif |
| |
| ifdef CONFIG_LTO |
| LTO_CFLAGS := $(lto-clang-flags) |
| KBUILD_CFLAGS += $(LTO_CFLAGS) |
| |
| DISABLE_LTO := $(DISABLE_LTO_CLANG) |
| export LTO_CFLAGS DISABLE_LTO |
| endif |
| |
| ifdef CONFIG_CFI_CLANG |
| cfi-clang-flags += -fsanitize=cfi -fno-sanitize-cfi-canonical-jump-tables \ |
| -fno-sanitize-blacklist |
| DISABLE_CFI_CLANG := -fno-sanitize=cfi |
| ifdef CONFIG_MODULES |
| cfi-clang-flags += -fsanitize-cfi-cross-dso |
| DISABLE_CFI_CLANG += -fno-sanitize-cfi-cross-dso |
| endif |
| ifdef CONFIG_CFI_PERMISSIVE |
| cfi-clang-flags += -fsanitize-recover=cfi -fno-sanitize-trap=cfi |
| endif |
| |
| # also disable CFI when LTO is disabled |
| DISABLE_LTO_CLANG += $(DISABLE_CFI_CLANG) |
| # allow disabling only clang CFI where needed |
| export DISABLE_CFI_CLANG |
| endif |
| |
| ifdef CONFIG_CFI |
| CFI_CFLAGS := $(cfi-clang-flags) |
| KBUILD_CFLAGS += $(CFI_CFLAGS) |
| |
| DISABLE_CFI := $(DISABLE_CFI_CLANG) |
| DISABLE_LTO += $(DISABLE_CFI) |
| export CFI_CFLAGS DISABLE_CFI |
| endif |
| |
| ifdef CONFIG_SHADOW_CALL_STACK |
| CC_FLAGS_SCS := -fsanitize=shadow-call-stack |
| KBUILD_CFLAGS += $(CC_FLAGS_SCS) |
| export CC_FLAGS_SCS |
| endif |
| |
| # arch Makefile may override CC so keep this after arch Makefile is included |
| NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
| |
| # warn about C99 declaration after statement |
| KBUILD_CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
| |
| # disable pointer signed / unsigned warnings in gcc 4.0 |
| KBUILD_CFLAGS += $(call cc-disable-warning, pointer-sign) |
| |
| # disable stringop warnings in gcc 8+ |
| KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) |
| |
| # We'll want to enable this eventually, but it's not going away for 5.7 at least |
| KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) |
| KBUILD_CFLAGS += $(call cc-disable-warning, array-bounds) |
| KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) |
| |
| # Another good warning that we'll want to enable eventually |
| KBUILD_CFLAGS += $(call cc-disable-warning, restrict) |
| |
| # Enabled with W=2, disabled by default as noisy |
| KBUILD_CFLAGS += $(call cc-disable-warning, maybe-uninitialized) |
| |
| # disable invalid "can't wrap" optimizations for signed / pointers |
| KBUILD_CFLAGS += $(call cc-option,-fno-strict-overflow) |
| |
| # clang sets -fmerge-all-constants by default as optimization, but this |
| # is non-conforming behavior for C and in fact breaks the kernel, so we |
| # need to disable it here generally. |
| KBUILD_CFLAGS += $(call cc-option,-fno-merge-all-constants) |
| |
| # for gcc -fno-merge-all-constants disables everything, but it is fine |
| # to have actual conforming behavior enabled. |
| KBUILD_CFLAGS += $(call cc-option,-fmerge-constants) |
| |
| # Make sure -fstack-check isn't enabled (like gentoo apparently did) |
| KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,) |
| |
| # conserve stack if available |
| KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) |
| |
| # disallow errors like 'EXPORT_GPL(foo);' with missing header |
| KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int) |
| |
| # require functions to have arguments in prototypes, not empty 'int foo()' |
| KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes) |
| |
| # Prohibit date/time macros, which would make the build non-deterministic |
| KBUILD_CFLAGS += $(call cc-option,-Werror=date-time) |
| |
| # enforce correct pointer usage |
| KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) |
| |
| # Require designated initializers for all marked structures |
| KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) |
| |
| # change __FILE__ to the relative path from the srctree |
| KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
| |
| # ensure -fcf-protection is disabled when using retpoline as it is |
| # incompatible with -mindirect-branch=thunk-extern |
| ifdef CONFIG_RETPOLINE |
| KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) |
| endif |
| |
| # use the deterministic mode of AR if available |
| KBUILD_ARFLAGS := $(call ar-option,D) |
| |
| 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) |
| |
| # Use --build-id when available. |
| LDFLAGS_BUILD_ID := $(call ld-option, --build-id) |
| KBUILD_LDFLAGS_MODULE += $(LDFLAGS_BUILD_ID) |
| LDFLAGS_vmlinux += $(LDFLAGS_BUILD_ID) |
| |
| ifeq ($(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) |
| |
| # the checker needs the correct machine size |
| CHECKFLAGS += $(if $(CONFIG_64BIT),-m64,-m32) |
| |
| # Default kernel image to build when no specific target is given. |
| # KBUILD_IMAGE may be overruled on the command line or |
| # set in the environment |
| # Also any assignments in arch/$(ARCH)/Makefile take precedence over |
| # this default value |
| export KBUILD_IMAGE ?= vmlinux |
| |
| # |
| # INSTALL_PATH specifies where to place the updated kernel and system map |
| # images. Default is /boot, but you can set it to other values |
| export INSTALL_PATH ?= /boot |
| |
| # |
| # INSTALL_DTBS_PATH specifies a prefix for relocations required by build roots. |
| # Like INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed as |
| # an argument if needed. Otherwise it defaults to the kernel install path |
| # |
| export INSTALL_DTBS_PATH ?= $(INSTALL_PATH)/dtbs/$(KERNELRELEASE) |
| |
| # |
| # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory |
| # relocations required by build roots. This is not defined in the |
| # makefile but the argument can be passed to make if needed. |
| # |
| |
| MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
| export MODLIB |
| |
| # |
| # INSTALL_MOD_STRIP, if defined, will cause modules to be |
| # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then |
| # the default option --strip-debug will be used. Otherwise, |
| # INSTALL_MOD_STRIP value will be used as the options to the strip command. |
| |
| ifdef INSTALL_MOD_STRIP |
| ifeq ($(INSTALL_MOD_STRIP),1) |
| mod_strip_cmd = $(STRIP) --strip-debug |
| else |
| mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP) |
| endif # INSTALL_MOD_STRIP=1 |
| else |
| mod_strip_cmd = true |
| endif # INSTALL_MOD_STRIP |
| export mod_strip_cmd |
| |
| # CONFIG_MODULE_COMPRESS, if defined, will cause module to be compressed |
| # after they are installed in agreement with CONFIG_MODULE_COMPRESS_GZIP |
| # or CONFIG_MODULE_COMPRESS_XZ. |
| |
| mod_compress_cmd = true |
| ifdef CONFIG_MODULE_COMPRESS |
| ifdef CONFIG_MODULE_COMPRESS_GZIP |
| mod_compress_cmd = gzip -n -f |
| endif # CONFIG_MODULE_COMPRESS_GZIP |
| ifdef CONFIG_MODULE_COMPRESS_XZ |
| mod_compress_cmd = xz -f |
| endif # CONFIG_MODULE_COMPRESS_XZ |
| endif # CONFIG_MODULE_COMPRESS |
| export mod_compress_cmd |
| |
| # Select initial ramdisk compression format, default is gzip(1). |
| # This shall be used by the dracut(8) tool while creating an initramfs image. |
| # |
| INITRD_COMPRESS-y := gzip |
| INITRD_COMPRESS-$(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)) |
| |
| mod_sign_cmd = scripts/sign-file $(CONFIG_MODULE_SIG_HASH) $(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY) certs/signing_key.x509 |
| else |
| mod_sign_cmd = true |
| endif |
| export mod_sign_cmd |
| |
| HOST_LIBELF_LIBS = $(shell pkg-config libelf --libs 2>/dev/null || echo -lelf) |
| |
| ifdef CONFIG_STACK_VALIDATION |
| has_libelf := $(call try-run,\ |
| echo "int main() {}" | $(HOSTCC) -xc -o /dev/null $(HOST_LIBELF_LIBS) -,1,0) |
| ifeq ($(has_libelf),1) |
| objtool_target := tools/objtool FORCE |
| else |
| SKIP_STACK_VALIDATION := 1 |
| export SKIP_STACK_VALIDATION |
| endif |
| endif |
| |
| PHONY += prepare0 |
| |
| ifeq ($(KBUILD_EXTMOD),) |
| core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
| |
| vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ |
| $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ |
| $(net-y) $(net-m) $(libs-y) $(libs-m) $(virt-y))) |
| |
| vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ |
| $(init-) $(core-) $(drivers-) $(net-) $(libs-) $(virt-)))) |
| |
| init-y := $(patsubst %/, %/built-in.a, $(init-y)) |
| core-y := $(patsubst %/, %/built-in.a, $(core-y)) |
| drivers-y := $(patsubst %/, %/built-in.a, $(drivers-y)) |
| net-y := $(patsubst %/, %/built-in.a, $(net-y)) |
| libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) |
| 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_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) |
| |
| # Recurse until adjust_autoksyms.sh is satisfied |
| PHONY += autoksyms_recursive |
| autoksyms_recursive: $(vmlinux-deps) |
| ifdef CONFIG_TRIM_UNUSED_KSYMS |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
| "$(MAKE) -f $(srctree)/Makefile vmlinux" |
| endif |
| |
| # For the kernel to actually contain only the needed exported symbols, |
| # we have to build modules as well to determine what those symbols are. |
| # (this can be evaluated only once include/config/auto.conf has been included) |
| ifdef CONFIG_TRIM_UNUSED_KSYMS |
| KBUILD_MODULES := 1 |
| endif |
| |
| autoksyms_h := $(if $(CONFIG_TRIM_UNUSED_KSYMS), include/generated/autoksyms.h) |
| |
| quiet_cmd_autoksyms_h = GEN $@ |
| cmd_autoksyms_h = mkdir -p $(dir $@); \ |
| $(CONFIG_SHELL) $(srctree)/scripts/gen_autoksyms.sh $@ |
| |
| $(autoksyms_h): |
| $(call cmd,autoksyms_h) |
| |
| ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) |
| |
| # Final link of vmlinux with optional arch pass after final link |
| cmd_link-vmlinux = \ |
| $(CONFIG_SHELL) $< $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_vmlinux) ; \ |
| $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
| |
| vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE |
| ifdef CONFIG_HEADERS_CHECK |
| $(Q)$(MAKE) -f $(srctree)/Makefile headers_check |
| endif |
| ifdef CONFIG_GDB_SCRIPTS |
| $(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py) |
| endif |
| +$(call if_changed,link-vmlinux) |
| |
| # Build samples along the rest of the kernel. This needs headers_install. |
| ifdef CONFIG_SAMPLES |
| vmlinux-dirs += samples |
| samples: headers_install |
| endif |
| |
| # 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 scripts |
| $(Q)$(MAKE) $(build)=$@ need-builtin=1 |
| |
| define filechk_kernel.release |
| echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion \ |
| $(srctree) $(BRANCH) $(KMI_GENERATION))" |
| endef |
| |
| # Store (new) KERNELRELEASE string in include/config/kernel.release |
| include/config/kernel.release: $(srctree)/Makefile FORCE |
| $(call filechk,kernel.release) |
| |
| # Additional helpers built in scripts/ |
| # Carefully list dependencies so we do not try to build scripts twice |
| # in parallel |
| PHONY += scripts |
| scripts: scripts_basic asm-generic gcc-plugins $(autoksyms_h) |
| $(Q)$(MAKE) $(build)=$(@) |
| |
| # Things we need to do before we recursively start building the kernel |
| # or the modules are listed in "prepare". |
| # A multi level approach is used. prepareN is processed before prepareN-1. |
| # 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 |
| |
| # 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 |
| ifneq ($(KBUILD_SRC),) |
| @$(kecho) ' Using $(srctree) as source for kernel' |
| $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \ |
| echo >&2 " $(srctree) is not clean, please run 'make mrproper'"; \ |
| echo >&2 " in the '$(srctree)' directory.";\ |
| /bin/false; \ |
| 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 |
| $(cmd_crmodverdir) |
| |
| archprepare: archheaders archscripts prepare1 scripts_basic |
| |
| prepare0: archprepare gcc-plugins |
| $(Q)$(MAKE) $(build)=. |
| |
| # All the preparing.. |
| prepare: prepare0 prepare-objtool |
| |
| # Support for using generic headers in asm-generic |
| PHONY += asm-generic uapi-asm-generic |
| asm-generic: uapi-asm-generic |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ |
| src=asm obj=arch/$(SRCARCH)/include/generated/asm |
| uapi-asm-generic: |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \ |
| src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm |
| |
| PHONY += prepare-objtool |
| prepare-objtool: $(objtool_target) |
| ifeq ($(SKIP_STACK_VALIDATION),1) |
| ifdef CONFIG_UNWINDER_ORC |
| @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 |
| @false |
| else |
| @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 |
| endif |
| endif |
| |
| # Generate some files |
| # --------------------------------------------------------------------------- |
| |
| # KERNELRELEASE can change from a few different places, meaning version.h |
| # needs to be updated, so this check is forced on all builds |
| |
| uts_len := 64 |
| ifneq (,$(BUILD_NUMBER)) |
| UTS_RELEASE=$(KERNELRELEASE)-ab$(BUILD_NUMBER) |
| else |
| UTS_RELEASE=$(KERNELRELEASE) |
| endif |
| define filechk_utsrelease.h |
| if [ `echo -n "$(UTS_RELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
| echo '"$(UTS_RELEASE)" exceeds $(uts_len) characters' >&2; \ |
| exit 1; \ |
| fi; \ |
| (echo \#define UTS_RELEASE \"$(UTS_RELEASE)\";) |
| endef |
| |
| define filechk_version.h |
| (echo \#define LINUX_VERSION_CODE $(shell \ |
| expr $(VERSION) \* 65536 + 0$(PATCHLEVEL) \* 256 + 0$(SUBLEVEL)); \ |
| echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';) |
| endef |
| |
| $(version_h): FORCE |
| $(call filechk,version.h) |
| $(Q)rm -f $(old_version_h) |
| |
| include/generated/utsrelease.h: include/config/kernel.release FORCE |
| $(call filechk,utsrelease.h) |
| |
| PHONY += headerdep |
| headerdep: |
| $(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \ |
| $(srctree)/scripts/headerdep.pl -I$(srctree)/include |
| |
| # --------------------------------------------------------------------------- |
| # Kernel headers |
| |
| #Default location for installed headers |
| export INSTALL_HDR_PATH = $(objtree)/usr |
| |
| # If we do an all arch process set dst to include/arch-$(SRCARCH) |
| hdr-dst = $(if $(KBUILD_HEADERS), dst=include/arch-$(SRCARCH), dst=include) |
| |
| PHONY += archheaders |
| archheaders: |
| |
| PHONY += archscripts |
| archscripts: |
| |
| PHONY += __headers |
| __headers: $(version_h) scripts_basic uapi-asm-generic archheaders archscripts |
| $(Q)$(MAKE) $(build)=scripts build_unifdef |
| |
| PHONY += headers_install_all |
| headers_install_all: |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh install |
| |
| PHONY += headers_install |
| headers_install: __headers |
| $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
| $(error Headers not exportable for the $(SRCARCH) architecture)) |
| $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include |
| $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) |
| |
| PHONY += headers_check_all |
| headers_check_all: headers_install_all |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/headers.sh check |
| |
| PHONY += headers_check |
| headers_check: headers_install |
| $(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1 |
| $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1 |
| |
| # --------------------------------------------------------------------------- |
| # Kernel selftest |
| |
| PHONY += kselftest |
| kselftest: |
| $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
| |
| PHONY += kselftest-clean |
| kselftest-clean: |
| $(Q)$(MAKE) -C $(srctree)/tools/testing/selftests clean |
| |
| PHONY += kselftest-merge |
| kselftest-merge: |
| $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!)) |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ |
| -m $(objtree)/.config \ |
| $(srctree)/tools/testing/selftests/*/config |
| +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig |
| |
| # --------------------------------------------------------------------------- |
| # Modules |
| |
| ifdef CONFIG_MODULES |
| |
| # By default, build modules as well |
| |
| all: modules |
| |
| # When we're building modules with modversions, we need to consider |
| # the built-in objects during the descend as well, in order to |
| # make sure the checksums are up to date before we record them. |
| ifdef CONFIG_MODVERSIONS |
| KBUILD_BUILTIN := 1 |
| endif |
| |
| # Build modules |
| # |
| # A module can be listed more than once in obj-m resulting in |
| # duplicate lines in modules.order files. Those are removed |
| # using awk while concatenating to the final file. |
| |
| PHONY += modules |
| modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) modules.builtin |
| $(Q)$(AWK) '!x[$$0]++' $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order |
| @$(kecho) ' Building modules, stage 2.'; |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| |
| modules.builtin: $(vmlinux-dirs:%=%/modules.builtin) |
| $(Q)$(AWK) '!x[$$0]++' $^ > $(objtree)/modules.builtin |
| |
| %/modules.builtin: include/config/auto.conf include/config/tristate.conf |
| $(Q)$(MAKE) $(modbuiltin)=$* |
| |
| |
| # Target to prepare building external modules |
| PHONY += modules_prepare |
| modules_prepare: prepare scripts |
| |
| # Target to install modules |
| PHONY += modules_install |
| modules_install: _modinst_ _modinst_post |
| |
| PHONY += _modinst_ |
| _modinst_: |
| @rm -rf $(MODLIB)/kernel |
| @rm -f $(MODLIB)/source |
| @mkdir -p $(MODLIB)/kernel |
| @ln -s $(abspath $(srctree)) $(MODLIB)/source |
| @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ |
| rm -f $(MODLIB)/build ; \ |
| ln -s $(CURDIR) $(MODLIB)/build ; \ |
| fi |
| @cp -f $(objtree)/modules.order $(MODLIB)/ |
| @cp -f $(objtree)/modules.builtin $(MODLIB)/ |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| |
| # This depmod is only for convenience to give the initial |
| # boot a modules.dep even before / is mounted read-write. However the |
| # boot script depmod is the master version. |
| PHONY += _modinst_post |
| _modinst_post: _modinst_ |
| $(call cmd,depmod) |
| |
| ifeq ($(CONFIG_MODULE_SIG), y) |
| PHONY += modules_sign |
| modules_sign: |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modsign |
| endif |
| |
| else # CONFIG_MODULES |
| |
| # Modules not configured |
| # --------------------------------------------------------------------------- |
| |
| PHONY += modules modules_install |
| modules modules_install: |
| @echo >&2 |
| @echo >&2 "The present kernel configuration has modules disabled." |
| @echo >&2 "Type 'make config' and enable loadable module support." |
| @echo >&2 "Then build a kernel with module support enabled." |
| @echo >&2 |
| @exit 1 |
| |
| endif # CONFIG_MODULES |
| |
| ### |
| # Cleaning is done on three levels. |
| # make clean Delete most generated files |
| # Leave enough to build external modules |
| # make mrproper Delete the current configuration, and all generated files |
| # make distclean Remove editor backup files, patch leftover files and the like |
| |
| # Directories & files removed with 'make clean' |
| CLEAN_DIRS += $(MODVERDIR) include/ksym |
| |
| # Directories & files removed with 'make mrproper' |
| MRPROPER_DIRS += include/config usr/include include/generated \ |
| arch/*/include/generated .tmp_objdiff |
| MRPROPER_FILES += .config .config.old .version \ |
| Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ |
| signing_key.pem signing_key.priv signing_key.x509 \ |
| x509.genkey extra_certificates signing_key.x509.keyid \ |
| signing_key.x509.signer vmlinux-gdb.py |
| |
| # clean - Delete most, but leave enough to build external modules |
| # |
| clean: rm-dirs := $(CLEAN_DIRS) |
| clean: rm-files := $(CLEAN_FILES) |
| clean-dirs := $(addprefix _clean_, . $(vmlinux-alldirs) Documentation samples) |
| |
| PHONY += $(clean-dirs) clean archclean vmlinuxclean |
| $(clean-dirs): |
| $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) |
| |
| vmlinuxclean: |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean |
| $(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
| |
| clean: archclean vmlinuxclean |
| |
| # mrproper - Delete all generated files, including .config |
| # |
| mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) |
| mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
| mrproper-dirs := $(addprefix _mrproper_,scripts) |
| |
| PHONY += $(mrproper-dirs) mrproper archmrproper |
| $(mrproper-dirs): |
| $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
| |
| mrproper: clean archmrproper $(mrproper-dirs) |
| $(call cmd,rmdirs) |
| $(call cmd,rmfiles) |
| |
| # distclean |
| # |
| PHONY += distclean |
| |
| distclean: mrproper |
| @find $(srctree) $(RCS_FIND_IGNORE) \ |
| \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
| -o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
| -o -name 'core' \) \ |
| -type f -print | xargs rm -f |
| |
| |
| # Packaging of the kernel to various formats |
| # --------------------------------------------------------------------------- |
| package-dir := scripts/package |
| |
| %src-pkg: FORCE |
| $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| %pkg: include/config/kernel.release FORCE |
| $(Q)$(MAKE) $(build)=$(package-dir) $@ |
| |
| |
| # Brief documentation of the typical targets used |
| # --------------------------------------------------------------------------- |
| |
| boards := $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*_defconfig) |
| boards := $(sort $(notdir $(boards))) |
| board-dirs := $(dir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/*/*_defconfig)) |
| board-dirs := $(sort $(notdir $(board-dirs:/=))) |
| |
| PHONY += help |
| help: |
| @echo 'Cleaning targets:' |
| @echo ' clean - Remove most generated files but keep the config and' |
| @echo ' enough build support to build external modules' |
| @echo ' mrproper - Remove all generated files + config + various backup files' |
| @echo ' distclean - mrproper + remove editor backup and patch files' |
| @echo '' |
| @echo 'Configuration targets:' |
| @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help |
| @echo '' |
| @echo 'Other generic targets:' |
| @echo ' all - Build all targets marked with [*]' |
| @echo '* vmlinux - Build the bare kernel' |
| @echo '* modules - Build all modules' |
| @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
| @echo ' dir/ - Build all files in dir and below' |
| @echo ' dir/file.[ois] - Build specified target only' |
| @echo ' dir/file.ll - Build the LLVM assembly file' |
| @echo ' (requires compiler support for LLVM assembly generation)' |
| @echo ' dir/file.lst - Build specified mixed source/assembly target only' |
| @echo ' (requires a recent binutils and recent build (System.map))' |
| @echo ' dir/file.ko - Build module including final link' |
| @echo ' modules_prepare - Set up for building external modules' |
| @echo ' tags/TAGS - Generate tags file for editors' |
| @echo ' cscope - Generate cscope index' |
| @echo ' gtags - Generate GNU GLOBAL index' |
| @echo ' kernelrelease - Output the release version string (use with make -s)' |
| @echo ' kernelversion - Output the version stored in Makefile (use with make -s)' |
| @echo ' image_name - Output the image name (use with make -s)' |
| @echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \ |
| echo ' (default: $(INSTALL_HDR_PATH))'; \ |
| echo '' |
| @echo 'Static analysers:' |
| @echo ' checkstack - Generate a list of stack hogs' |
| @echo ' namespacecheck - Name space analysis on compiled kernel' |
| @echo ' versioncheck - Sanity check on version.h usage' |
| @echo ' includecheck - Check for duplicate included header files' |
| @echo ' export_report - List the usages of all exported symbols' |
| @echo ' headers_check - Sanity check on exported headers' |
| @echo ' headerdep - Detect inclusion cycles in headers' |
| @echo ' coccicheck - Check with Coccinelle' |
| @echo '' |
| @echo 'Kernel selftest:' |
| @echo ' kselftest - Build and run kernel selftest (run as root)' |
| @echo ' Build, install, and boot kernel before' |
| @echo ' running kselftest on it' |
| @echo ' kselftest-clean - Remove all generated kselftest files' |
| @echo ' kselftest-merge - Merge all the config dependencies of kselftest to existing' |
| @echo ' .config.' |
| @echo '' |
| @echo 'Userspace tools targets:' |
| @echo ' use "make tools/help"' |
| @echo ' or "cd tools; make help"' |
| @echo '' |
| @echo 'Kernel packaging:' |
| @$(MAKE) $(build)=$(package-dir) help |
| @echo '' |
| @echo 'Documentation targets:' |
| @$(MAKE) -f $(srctree)/Documentation/Makefile dochelp |
| @echo '' |
| @echo 'Architecture specific targets ($(SRCARCH)):' |
| @$(if $(archhelp),$(archhelp),\ |
| echo ' No architecture specific help defined for $(SRCARCH)') |
| @echo '' |
| @$(if $(boards), \ |
| $(foreach b, $(boards), \ |
| printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ |
| echo '') |
| @$(if $(board-dirs), \ |
| $(foreach b, $(board-dirs), \ |
| printf " %-16s - Show %s-specific targets\\n" help-$(b) $(b);) \ |
| printf " %-16s - Show all of the above\\n" help-boards; \ |
| echo '') |
| |
| @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' |
| @echo ' make V=2 [targets] 2 => give reason for rebuild of target' |
| @echo ' make O=dir [targets] Locate all output files in "dir", including .config' |
| @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 ' 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' |
| @echo ' Multiple levels can be combined with W=12 or W=123' |
| @echo '' |
| @echo 'Execute "make" or "make all" to build all targets marked with [*] ' |
| @echo 'For further info see the ./README file' |
| |
| |
| help-board-dirs := $(addprefix help-,$(board-dirs)) |
| |
| help-boards: $(help-board-dirs) |
| |
| boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig))) |
| |
| $(help-board-dirs): help-%: |
| @echo 'Architecture specific targets ($(SRCARCH) $*):' |
| @$(if $(boards-per-dir), \ |
| $(foreach b, $(boards-per-dir), \ |
| printf " %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \ |
| echo '') |
| |
| |
| # Documentation targets |
| # --------------------------------------------------------------------------- |
| DOC_TARGETS := xmldocs latexdocs pdfdocs htmldocs epubdocs cleandocs \ |
| linkcheckdocs dochelp refcheckdocs |
| PHONY += $(DOC_TARGETS) |
| $(DOC_TARGETS): scripts_basic FORCE |
| $(Q)$(MAKE) $(build)=Documentation $@ |
| |
| else # KBUILD_EXTMOD |
| |
| ### |
| # External module support. |
| # When building external modules the kernel used as basis is considered |
| # read-only, and no consistency checks are made and the make |
| # system is not used on the basis kernel. If updates are required |
| # in the basis kernel ordinary make commands (without M=...) must |
| # be used. |
| # |
| # The following are the only valid targets when building external |
| # modules. |
| # make M=dir clean Delete all automatically generated files |
| # make M=dir modules Make all modules in specified dir |
| # make M=dir Same as 'make M=dir modules' |
| # make M=dir modules_install |
| # Install the modules built in the module directory |
| # Assumes install directory is already created |
| |
| # We are always building modules |
| KBUILD_MODULES := 1 |
| |
| PHONY += $(objtree)/Module.symvers |
| $(objtree)/Module.symvers: |
| @test -e $(objtree)/Module.symvers || ( \ |
| echo; \ |
| echo " WARNING: Symbol version dump $(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_%,%,$@) |
| |
| modules: $(module-dirs) |
| @$(kecho) ' Building modules, stage 2.'; |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| |
| PHONY += modules_install |
| modules_install: _emodinst_ _emodinst_post |
| |
| install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra) |
| PHONY += _emodinst_ |
| _emodinst_: |
| $(Q)mkdir -p $(MODLIB)/$(install-dir) |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
| |
| 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: rm-dirs := $(MODVERDIR) |
| clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers |
| |
| PHONY += help |
| help: |
| @echo ' Building external modules.' |
| @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' |
| @echo '' |
| @echo ' modules - default target, build the module(s)' |
| @echo ' modules_install - install the module' |
| @echo ' clean - remove generated files in module directory only' |
| @echo '' |
| |
| # Dummies... |
| PHONY += prepare scripts |
| prepare: |
| $(cmd_crmodverdir) |
| scripts: ; |
| endif # KBUILD_EXTMOD |
| |
| clean: $(clean-dirs) |
| $(call cmd,rmdirs) |
| $(call cmd,rmfiles) |
| @find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
| \( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
| -o -name '*.ko.*' -o -name '*.dtb' -o -name '*.dtb.S' \ |
| -o -name '*.dwo' -o -name '*.lst' \ |
| -o -name '*.su' \ |
| -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
| -o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
| -o -name '*.asn1.[ch]' \ |
| -o -name '*.symtypes' -o -name 'modules.order' \ |
| -o -name modules.builtin -o -name '.tmp_*.o.*' \ |
| -o -name '*.c.[012]*.*' \ |
| -o -name '*.ll' \ |
| -o -name '*.gcno' \ |
| -o -name '*.*.symversions' \) -type f -print | xargs rm -f |
| |
| # Generate tags for editors |
| # --------------------------------------------------------------------------- |
| quiet_cmd_tags = GEN $@ |
| cmd_tags = $(CONFIG_SHELL) $(srctree)/scripts/tags.sh $@ |
| |
| tags TAGS cscope gtags: FORCE |
| $(call cmd,tags) |
| |
| # Scripts to check various things for consistency |
| # --------------------------------------------------------------------------- |
| |
| PHONY += includecheck versioncheck coccicheck namespacecheck export_report |
| |
| includecheck: |
| find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| -name '*.[hcS]' -type f -print | sort \ |
| | xargs $(PERL) -w $(srctree)/scripts/checkincludes.pl |
| |
| versioncheck: |
| find $(srctree)/* $(RCS_FIND_IGNORE) \ |
| -name '*.[hcS]' -type f -print | sort \ |
| | xargs $(PERL) -w $(srctree)/scripts/checkversion.pl |
| |
| coccicheck: |
| $(Q)$(CONFIG_SHELL) $(srctree)/scripts/$@ |
| |
| namespacecheck: |
| $(PERL) $(srctree)/scripts/namespace.pl |
| |
| export_report: |
| $(PERL) $(srctree)/scripts/export_report.pl |
| |
| endif #ifeq ($(config-targets),1) |
| endif #ifeq ($(mixed-targets),1) |
| |
| PHONY += checkstack kernelrelease kernelversion image_name |
| |
| # UML needs a little special treatment here. It wants to use the host |
| # toolchain, so needs $(SUBARCH) passed to checkstack.pl. Everyone |
| # else wants $(ARCH), including people doing cross-builds, which means |
| # that $(SUBARCH) doesn't work here. |
| ifeq ($(ARCH), um) |
| CHECKSTACK_ARCH := $(SUBARCH) |
| else |
| CHECKSTACK_ARCH := $(ARCH) |
| endif |
| checkstack: |
| $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ |
| $(PERL) $(src)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
| |
| kernelrelease: |
| @echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion \ |
| $(srctree) $(BRANCH) $(KMI_GENERATION))" |
| |
| kernelversion: |
| @echo $(KERNELVERSION) |
| |
| image_name: |
| @echo $(KBUILD_IMAGE) |
| |
| # Clear a bunch of variables before executing the submake |
| 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/ |
| |
| 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/ $* |
| |
| # Single targets |
| # --------------------------------------------------------------------------- |
| # Single targets are compatible with: |
| # - build with mixed source and output |
| # - build with separate output dir 'make O=...' |
| # - external modules |
| # |
| # target-dir => where to store outputfile |
| # build-dir => directory in kernel source tree to use |
| |
| ifeq ($(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 scripts FORCE |
| $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| %.i: %.c prepare scripts FORCE |
| $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| %.o: %.c prepare scripts FORCE |
| $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| %.lst: %.c prepare scripts FORCE |
| $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| %.s: %.S prepare scripts FORCE |
| $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| %.o: %.S prepare scripts FORCE |
| $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| %.symtypes: %.c prepare scripts FORCE |
| $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| %.ll: %.c prepare scripts FORCE |
| $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) |
| |
| # Modules |
| /: prepare scripts FORCE |
| $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| $(build)=$(build-dir) |
| # Make sure the latest headers are built for Documentation |
| Documentation/ samples/: headers_install |
| %/: prepare scripts FORCE |
| $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| $(build)=$(build-dir) |
| %.ko: prepare scripts FORCE |
| $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \ |
| $(build)=$(build-dir) $(@:.ko=.o) |
| $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
| |
| # FIXME Should go into a make.lib or something |
| # =========================================================================== |
| |
| quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) |
| cmd_rmdirs = rm -rf $(rm-dirs) |
| |
| quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
| cmd_rmfiles = rm -f $(rm-files) |
| |
| # Run depmod only if we have System.map and depmod is executable |
| quiet_cmd_depmod = DEPMOD $(KERNELRELEASE) |
| cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
| $(KERNELRELEASE) |
| |
| # Create temporary dir for module support files |
| # clean it up only when building all modules |
| cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \ |
| $(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*) |
| |
| # read all saved command lines |
| |
| cmd_files := $(wildcard .*.cmd $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) |
| |
| ifneq ($(cmd_files),) |
| $(cmd_files): ; # Do not try to update included dependency files |
| include $(cmd_files) |
| endif |
| |
| endif # skip-makefile |
| |
| PHONY += FORCE |
| FORCE: |
| |
| # Declare the contents of the PHONY variable as phony. We keep that |
| # information in a variable so we can use it in if_changed and friends. |
| .PHONY: $(PHONY) |