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1979 lines
64 KiB
1979 lines
64 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# Older dsat code has been merged with NXT |
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# QortalOS NXT central by Scare Crowe |
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VERSION = 5 |
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PATCHLEVEL = 20 |
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SUBLEVEL = 14 |
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EXTRAVERSION = -LTS |
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NAME = BrooklynR NXT Sinclair |
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# *DOCUMENTATION* |
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# Public Domain Satellite Project removal. |
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# This Linux Kernel is now Qortal only without aerospace feature. |
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# To see a list of typical targets execute "make help" |
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# More info can be located in ./README |
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# Comments in this file are targeted only to the developer, do not |
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# expect to learn how to build the kernel reading this file. |
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$(if $(filter __%, $(MAKECMDGOALS)), \ |
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$(error targets prefixed with '__' are only for internal use)) |
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# That's our default target when none is given on the command line |
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PHONY := __all |
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__all: |
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# We are using a recursive build, so we need to do a little thinking |
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# to get the ordering right. |
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# |
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# Most importantly: sub-Makefiles should only ever modify files in |
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# their own directory. If in some directory we have a dependency on |
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# a file in another dir (which doesn't happen often, but it's often |
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# unavoidable when linking the built-in.a targets which finally |
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# turn into vmlinux), we will call a sub make in that other dir, and |
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# after that we are sure that everything which is in that other dir |
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# is now up to date. |
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# |
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# The only cases where we need to modify files which have global |
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# effects are thus separated out and done before the recursive |
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# descending is started. They are now explicitly listed as the |
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# prepare rule. |
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ifneq ($(sub_make_done),1) |
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# Do not use make's built-in rules and variables |
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# (this increases performance and avoids hard-to-debug behaviour) |
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MAKEFLAGS += -rR |
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# Avoid funny character set dependencies |
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unexport LC_ALL |
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LC_COLLATE=C |
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LC_NUMERIC=C |
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export LC_COLLATE LC_NUMERIC |
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# Avoid interference with shell env settings |
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unexport GREP_OPTIONS |
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# Beautify output |
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# --------------------------------------------------------------------------- |
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# |
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# Normally, we echo the whole command before executing it. By making |
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# that echo $($(quiet)$(cmd)), we now have the possibility to set |
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# $(quiet) to choose other forms of output instead, e.g. |
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# |
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# quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ |
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# cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
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# |
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# If $(quiet) is empty, the whole command will be printed. |
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# If it is set to "quiet_", only the short version will be printed. |
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# If it is set to "silent_", nothing will be printed at all, since |
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# the variable $(silent_cmd_cc_o_c) doesn't exist. |
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# |
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# A simple variant is to prefix commands with $(Q) - that's useful |
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# for commands that shall be hidden in non-verbose mode. |
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# |
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# $(Q)ln $@ :< |
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# |
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# If KBUILD_VERBOSE equals 0 then the above command will be hidden. |
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# If KBUILD_VERBOSE equals 1 then the above command is displayed. |
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# If KBUILD_VERBOSE equals 2 then give the reason why each target is rebuilt. |
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# |
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# To put more focus on warnings, be less verbose as default |
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# Use 'make V=1' to see the full commands |
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ifeq ("$(origin V)", "command line") |
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KBUILD_VERBOSE = $(V) |
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endif |
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ifndef KBUILD_VERBOSE |
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KBUILD_VERBOSE = 0 |
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endif |
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ifeq ($(KBUILD_VERBOSE),1) |
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quiet = |
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Q = |
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else |
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quiet=quiet_ |
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Q = @ |
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endif |
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# If the user is running make -s (silent mode), suppress echoing of |
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# commands |
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ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),) |
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quiet=silent_ |
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KBUILD_VERBOSE = 0 |
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endif |
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export quiet Q KBUILD_VERBOSE |
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# Call a source code checker (by default, "sparse") as part of the |
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# C compilation. |
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# |
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# Use 'make C=1' to enable checking of only re-compiled files. |
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# Use 'make C=2' to enable checking of *all* source files, regardless |
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# of whether they are re-compiled or not. |
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# |
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# See the file "Documentation/dev-tools/sparse.rst" for more details, |
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# including where to get the "sparse" utility. |
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ifeq ("$(origin C)", "command line") |
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KBUILD_CHECKSRC = $(C) |
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endif |
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ifndef KBUILD_CHECKSRC |
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KBUILD_CHECKSRC = 0 |
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endif |
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export KBUILD_CHECKSRC |
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# Use make M=dir or set the environment variable KBUILD_EXTMOD to specify the |
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# directory of external module to build. Setting M= takes precedence. |
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ifeq ("$(origin M)", "command line") |
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KBUILD_EXTMOD := $(M) |
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endif |
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$(if $(word 2, $(KBUILD_EXTMOD)), \ |
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$(error building multiple external modules is not supported)) |
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# Remove trailing slashes |
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ifneq ($(filter %/, $(KBUILD_EXTMOD)),) |
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KBUILD_EXTMOD := $(shell dirname $(KBUILD_EXTMOD).) |
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endif |
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export KBUILD_EXTMOD |
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# Kbuild will save output files in the current working directory. |
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# This does not need to match to the root of the kernel source tree. |
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# |
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# For example, you can do this: |
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# |
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# cd /dir/to/store/output/files; make -f /dir/to/kernel/source/Makefile |
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# |
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# If you want to save output files in a different location, there are |
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# two syntaxes to specify it. |
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# |
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# 1) O= |
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# Use "make O=dir/to/store/output/files/" |
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# |
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# 2) Set KBUILD_OUTPUT |
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# Set the environment variable KBUILD_OUTPUT to point to the output directory. |
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# export KBUILD_OUTPUT=dir/to/store/output/files/; make |
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# |
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# The O= assignment takes precedence over the KBUILD_OUTPUT environment |
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# variable. |
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# Do we want to change the working directory? |
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ifeq ("$(origin O)", "command line") |
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KBUILD_OUTPUT := $(O) |
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endif |
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ifneq ($(KBUILD_OUTPUT),) |
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# Make's built-in functions such as $(abspath ...), $(realpath ...) cannot |
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# expand a shell special character '~'. We use a somewhat tedious way here. |
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abs_objtree := $(shell mkdir -p $(KBUILD_OUTPUT) && cd $(KBUILD_OUTPUT) && pwd) |
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$(if $(abs_objtree),, \ |
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$(error failed to create output directory "$(KBUILD_OUTPUT)")) |
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# $(realpath ...) resolves symlinks |
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abs_objtree := $(realpath $(abs_objtree)) |
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else |
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abs_objtree := $(CURDIR) |
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endif # ifneq ($(KBUILD_OUTPUT),) |
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ifeq ($(abs_objtree),$(CURDIR)) |
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# Suppress "Entering directory ..." unless we are changing the work directory. |
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MAKEFLAGS += --no-print-directory |
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else |
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need-sub-make := 1 |
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endif |
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this-makefile := $(lastword $(MAKEFILE_LIST)) |
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abs_srctree := $(realpath $(dir $(this-makefile))) |
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ifneq ($(words $(subst :, ,$(abs_srctree))), 1) |
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$(error source directory cannot contain spaces or colons) |
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endif |
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ifneq ($(abs_srctree),$(abs_objtree)) |
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# Look for make include files relative to root of kernel src |
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# |
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# This does not become effective immediately because MAKEFLAGS is re-parsed |
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# once after the Makefile is read. We need to invoke sub-make. |
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MAKEFLAGS += --include-dir=$(abs_srctree) |
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need-sub-make := 1 |
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endif |
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ifneq ($(filter 3.%,$(MAKE_VERSION)),) |
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# 'MAKEFLAGS += -rR' does not immediately become effective for GNU Make 3.x |
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# We need to invoke sub-make to avoid implicit rules in the top Makefile. |
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need-sub-make := 1 |
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# Cancel implicit rules for this Makefile. |
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$(this-makefile): ; |
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endif |
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export abs_srctree abs_objtree |
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export sub_make_done := 1 |
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ifeq ($(need-sub-make),1) |
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PHONY += $(MAKECMDGOALS) __sub-make |
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$(filter-out $(this-makefile), $(MAKECMDGOALS)) __all: __sub-make |
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@: |
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# Invoke a second make in the output directory, passing relevant variables |
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__sub-make: |
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$(Q)$(MAKE) -C $(abs_objtree) -f $(abs_srctree)/Makefile $(MAKECMDGOALS) |
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endif # need-sub-make |
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endif # sub_make_done |
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# We process the rest of the Makefile if this is the final invocation of make |
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ifeq ($(need-sub-make),) |
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# Do not print "Entering directory ...", |
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# but we want to display it when entering to the output directory |
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# so that IDEs/editors are able to understand relative filenames. |
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MAKEFLAGS += --no-print-directory |
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ifeq ($(abs_srctree),$(abs_objtree)) |
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# building in the source tree |
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srctree := . |
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building_out_of_srctree := |
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else |
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ifeq ($(abs_srctree)/,$(dir $(abs_objtree))) |
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# building in a subdirectory of the source tree |
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srctree := .. |
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else |
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srctree := $(abs_srctree) |
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endif |
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building_out_of_srctree := 1 |
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endif |
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ifneq ($(KBUILD_ABS_SRCTREE),) |
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srctree := $(abs_srctree) |
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endif |
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objtree := . |
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VPATH := $(srctree) |
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export building_out_of_srctree srctree objtree VPATH |
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# To make sure we do not include .config for any of the *config targets |
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# catch them early, and hand them over to scripts/kconfig/Makefile |
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# It is allowed to specify more targets when calling make, including |
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# mixing *config targets and build targets. |
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# For example 'make oldconfig all'. |
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# Detect when mixed targets is specified, and make a second invocation |
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# of make so .config is not included in this case either (for *config). |
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version_h := include/generated/uapi/linux/version.h |
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clean-targets := %clean mrproper cleandocs |
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no-dot-config-targets := $(clean-targets) \ |
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cscope gtags TAGS tags help% %docs check% coccicheck \ |
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$(version_h) headers headers_% archheaders archscripts \ |
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%asm-generic kernelversion %src-pkg dt_binding_check \ |
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outputmakefile |
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# Installation targets should not require compiler. Unfortunately, vdso_install |
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# is an exception where build artifacts may be updated. This must be fixed. |
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no-compiler-targets := $(no-dot-config-targets) install dtbs_install \ |
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headers_install modules_install kernelrelease image_name |
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no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease \ |
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image_name |
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single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/ |
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config-build := |
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mixed-build := |
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need-config := 1 |
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need-compiler := 1 |
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may-sync-config := 1 |
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single-build := |
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ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) |
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ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) |
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need-config := |
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endif |
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endif |
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ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),) |
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ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),) |
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need-compiler := |
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endif |
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endif |
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ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),) |
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ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),) |
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may-sync-config := |
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endif |
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endif |
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ifneq ($(KBUILD_EXTMOD),) |
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may-sync-config := |
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endif |
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ifeq ($(KBUILD_EXTMOD),) |
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ifneq ($(filter %config,$(MAKECMDGOALS)),) |
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config-build := 1 |
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ifneq ($(words $(MAKECMDGOALS)),1) |
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mixed-build := 1 |
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endif |
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endif |
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endif |
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# We cannot build single targets and the others at the same time |
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ifneq ($(filter $(single-targets), $(MAKECMDGOALS)),) |
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single-build := 1 |
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ifneq ($(filter-out $(single-targets), $(MAKECMDGOALS)),) |
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mixed-build := 1 |
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endif |
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endif |
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# For "make -j clean all", "make -j mrproper defconfig all", etc. |
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ifneq ($(filter $(clean-targets),$(MAKECMDGOALS)),) |
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ifneq ($(filter-out $(clean-targets),$(MAKECMDGOALS)),) |
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mixed-build := 1 |
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endif |
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endif |
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# install and modules_install need also be processed one by one |
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ifneq ($(filter install,$(MAKECMDGOALS)),) |
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ifneq ($(filter modules_install,$(MAKECMDGOALS)),) |
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mixed-build := 1 |
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endif |
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endif |
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ifdef mixed-build |
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# =========================================================================== |
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# We're called with mixed targets (*config and build targets). |
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# Handle them one by one. |
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PHONY += $(MAKECMDGOALS) __build_one_by_one |
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$(MAKECMDGOALS): __build_one_by_one |
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@: |
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__build_one_by_one: |
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$(Q)set -e; \ |
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for i in $(MAKECMDGOALS); do \ |
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$(MAKE) -f $(srctree)/Makefile $$i; \ |
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done |
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else # !mixed-build |
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include $(srctree)/scripts/Kbuild.include |
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# Read KERNELRELEASE from include/config/kernel.release (if it exists) |
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KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) |
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KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) |
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export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION |
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include $(srctree)/scripts/subarch.include |
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# Cross compiling and selecting different set of gcc/bin-utils |
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# --------------------------------------------------------------------------- |
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# |
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# When performing cross compilation for other architectures ARCH shall be set |
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# to the target architecture. (See arch/* for the possibilities). |
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# ARCH can be set during invocation of make: |
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# make ARCH=ia64 |
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# Another way is to have ARCH set in the environment. |
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# The default ARCH is the host where make is executed. |
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# CROSS_COMPILE specify the prefix used for all executables used |
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# during compilation. Only gcc and related bin-utils executables |
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# are prefixed with $(CROSS_COMPILE). |
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# CROSS_COMPILE can be set on the command line |
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# make CROSS_COMPILE=ia64-linux- |
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# Alternatively CROSS_COMPILE can be set in the environment. |
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# Default value for CROSS_COMPILE is not to prefix executables |
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# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile |
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ARCH ?= $(SUBARCH) |
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# Architecture as present in compile.h |
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UTS_MACHINE := $(ARCH) |
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SRCARCH := $(ARCH) |
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# Additional ARCH settings for x86 |
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ifeq ($(ARCH),i386) |
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SRCARCH := x86 |
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endif |
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ifeq ($(ARCH),x86_64) |
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SRCARCH := x86 |
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endif |
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# Additional ARCH settings for sparc |
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ifeq ($(ARCH),sparc32) |
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SRCARCH := sparc |
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endif |
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ifeq ($(ARCH),sparc64) |
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SRCARCH := sparc |
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endif |
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export cross_compiling := |
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ifneq ($(SRCARCH),$(SUBARCH)) |
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cross_compiling := 1 |
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endif |
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KCONFIG_CONFIG ?= .config |
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export KCONFIG_CONFIG |
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# SHELL used by kbuild |
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CONFIG_SHELL := sh |
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HOST_LFS_CFLAGS := $(shell getconf LFS_CFLAGS 2>/dev/null) |
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HOST_LFS_LDFLAGS := $(shell getconf LFS_LDFLAGS 2>/dev/null) |
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HOST_LFS_LIBS := $(shell getconf LFS_LIBS 2>/dev/null) |
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ifneq ($(LLVM),) |
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HOSTCC = clang |
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HOSTCXX = clang++ |
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else |
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HOSTCC = gcc |
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HOSTCXX = g++ |
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endif |
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export KBUILD_USERCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ |
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-O2 -fomit-frame-pointer -std=gnu89 |
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export KBUILD_USERLDFLAGS := |
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KBUILD_HOSTCFLAGS := $(KBUILD_USERCFLAGS) $(HOST_LFS_CFLAGS) $(HOSTCFLAGS) |
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KBUILD_HOSTCXXFLAGS := -Wall -O2 $(HOST_LFS_CFLAGS) $(HOSTCXXFLAGS) |
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KBUILD_HOSTLDFLAGS := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS) |
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KBUILD_HOSTLDLIBS := $(HOST_LFS_LIBS) $(HOSTLDLIBS) |
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# Make variables (CC, etc...) |
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CPP = $(CC) -E |
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ifneq ($(LLVM),) |
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CC = clang |
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LD = ld.lld |
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AR = llvm-ar |
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NM = llvm-nm |
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OBJCOPY = llvm-objcopy |
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OBJDUMP = llvm-objdump |
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READELF = llvm-readelf |
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STRIP = llvm-strip |
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else |
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CC = $(CROSS_COMPILE)gcc |
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LD = $(CROSS_COMPILE)ld |
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AR = $(CROSS_COMPILE)ar |
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NM = $(CROSS_COMPILE)nm |
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OBJCOPY = $(CROSS_COMPILE)objcopy |
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OBJDUMP = $(CROSS_COMPILE)objdump |
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READELF = $(CROSS_COMPILE)readelf |
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STRIP = $(CROSS_COMPILE)strip |
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endif |
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PAHOLE = pahole |
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RESOLVE_BTFIDS = $(objtree)/tools/bpf/resolve_btfids/resolve_btfids |
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LEX = flex |
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YACC = bison |
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AWK = awk |
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INSTALLKERNEL := installkernel |
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DEPMOD = depmod |
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PERL = perl |
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PYTHON3 = python3 |
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CHECK = sparse |
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BASH = bash |
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KGZIP = gzip |
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KBZIP2 = bzip2 |
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KLZOP = lzop |
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LZMA = lzma |
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LZ4 = lz4c |
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XZ = xz |
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ZSTD = zstd |
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CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ |
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-Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF) |
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NOSTDINC_FLAGS := |
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CFLAGS_MODULE = |
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AFLAGS_MODULE = |
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LDFLAGS_MODULE = |
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CFLAGS_KERNEL = |
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AFLAGS_KERNEL = |
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LDFLAGS_vmlinux = |
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# Use USERINCLUDE when you must reference the UAPI directories only. |
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USERINCLUDE := \ |
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-I$(srctree)/arch/$(SRCARCH)/include/uapi \ |
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-I$(objtree)/arch/$(SRCARCH)/include/generated/uapi \ |
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-I$(srctree)/include/uapi \ |
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-I$(objtree)/include/generated/uapi \ |
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-include $(srctree)/include/linux/compiler-version.h \ |
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-include $(srctree)/include/linux/kconfig.h |
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# Use LINUXINCLUDE when you must reference the include/ directory. |
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# Needed to be compatible with the O= option |
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LINUXINCLUDE := \ |
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-I$(srctree)/arch/$(SRCARCH)/include \ |
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-I$(objtree)/arch/$(SRCARCH)/include/generated \ |
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$(if $(building_out_of_srctree),-I$(srctree)/include) \ |
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-I$(objtree)/include \ |
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$(USERINCLUDE) |
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KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE |
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KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \ |
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-fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \ |
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-Werror=implicit-function-declaration -Werror=implicit-int \ |
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-Werror=return-type -Wno-format-security \ |
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-std=gnu89 |
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KBUILD_CPPFLAGS := -D__KERNEL__ |
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KBUILD_AFLAGS_KERNEL := |
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KBUILD_CFLAGS_KERNEL := |
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KBUILD_AFLAGS_MODULE := -DMODULE |
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KBUILD_CFLAGS_MODULE := -DMODULE |
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KBUILD_LDFLAGS_MODULE := |
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KBUILD_LDFLAGS := |
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CLANG_FLAGS := |
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export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC |
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export CPP AR NM STRIP OBJCOPY OBJDUMP READELF PAHOLE RESOLVE_BTFIDS LEX YACC AWK INSTALLKERNEL |
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export PERL PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX |
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export KGZIP KBZIP2 KLZOP LZMA LZ4 XZ ZSTD |
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export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE |
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export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS |
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export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE |
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export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE |
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export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE |
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export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL |
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# Files to ignore in find ... statements |
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export RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o \ |
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-name CVS -o -name .pc -o -name .hg -o -name .git \) \ |
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-prune -o |
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export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn \ |
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--exclude CVS --exclude .pc --exclude .hg --exclude .git |
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# =========================================================================== |
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# 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 |
|
|
|
PHONY += outputmakefile |
|
ifdef building_out_of_srctree |
|
# 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. |
|
# At the same time when output Makefile generated, generate .gitignore to |
|
# ignore whole output directory |
|
|
|
quiet_cmd_makefile = GEN Makefile |
|
cmd_makefile = { \ |
|
echo "\# Automatically generated by $(srctree)/Makefile: don't edit"; \ |
|
echo "include $(srctree)/Makefile"; \ |
|
} > Makefile |
|
|
|
outputmakefile: |
|
$(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 |
|
$(call cmd,makefile) |
|
$(Q)test -e .gitignore || \ |
|
{ echo "# this is build directory, ignore it"; echo "*"; } > .gitignore |
|
endif |
|
|
|
# The expansion should be delayed until arch/$(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 = $(subst $(pound),,$(shell $(CC) --version 2>/dev/null | head -n 1)) |
|
|
|
ifneq ($(findstring clang,$(CC_VERSION_TEXT)),) |
|
ifneq ($(CROSS_COMPILE),) |
|
CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) |
|
endif |
|
ifeq ($(LLVM_IAS),1) |
|
CLANG_FLAGS += -integrated-as |
|
else |
|
CLANG_FLAGS += -no-integrated-as |
|
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit)) |
|
CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE)) |
|
endif |
|
CLANG_FLAGS += -Werror=unknown-warning-option |
|
KBUILD_CFLAGS += $(CLANG_FLAGS) |
|
KBUILD_AFLAGS += $(CLANG_FLAGS) |
|
export CLANG_FLAGS |
|
endif |
|
|
|
# Include this also for config targets because some architectures need |
|
# cc-cross-prefix to determine CROSS_COMPILE. |
|
ifdef need-compiler |
|
include $(srctree)/scripts/Makefile.compiler |
|
endif |
|
|
|
ifdef config-build |
|
# =========================================================================== |
|
# *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 $(srctree)/arch/$(SRCARCH)/Makefile |
|
export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT |
|
|
|
config: outputmakefile scripts_basic FORCE |
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@ |
|
|
|
%config: outputmakefile scripts_basic FORCE |
|
$(Q)$(MAKE) $(build)=scripts/kconfig $@ |
|
|
|
else #!config-build |
|
# =========================================================================== |
|
# Build targets only - this includes vmlinux, arch specific targets, clean |
|
# targets and others. In general all targets except *config targets. |
|
|
|
# If building an external module we do not care about the all: rule |
|
# but instead __all depend on modules |
|
PHONY += all |
|
ifeq ($(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 modules nsdeps %compile_commands.json clang-%,$(MAKECMDGOALS)),) |
|
KBUILD_MODULES := 1 |
|
endif |
|
|
|
ifeq ($(MAKECMDGOALS),) |
|
KBUILD_MODULES := 1 |
|
endif |
|
|
|
export KBUILD_MODULES KBUILD_BUILTIN |
|
|
|
ifdef need-config |
|
include include/config/auto.conf |
|
endif |
|
|
|
ifeq ($(KBUILD_EXTMOD),) |
|
# Objects we will link into vmlinux / subdirs we need to visit |
|
core-y := init/ usr/ arch/$(SRCARCH)/ |
|
drivers-y := drivers/ sound/ |
|
drivers-$(CONFIG_SAMPLES) += samples/ |
|
drivers-$(CONFIG_NET) += net/ |
|
drivers-y += virt/ |
|
libs-y := lib/ |
|
endif # KBUILD_EXTMOD |
|
|
|
# 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 |
|
|
|
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 |
|
|
|
include $(srctree)/arch/$(SRCARCH)/Makefile |
|
|
|
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. |
|
include 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). |
|
# |
|
# This exploits the 'multi-target pattern rule' trick. |
|
# The syncconfig should be executed only once to make all the targets. |
|
# (Note: use the grouped target '&:' when we bump to GNU Make 4.3) |
|
# |
|
# Do not use $(call cmd,...) here. That would suppress prompts from syncconfig, |
|
# so you cannot notice that Kconfig is waiting for the user input. |
|
%/config/auto.conf %/config/auto.conf.cmd %/generated/autoconf.h: $(KCONFIG_CONFIG) |
|
$(Q)$(kecho) " SYNC $@" |
|
$(Q)$(MAKE) -f $(srctree)/Makefile syncconfig |
|
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 |
|
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 # need-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, address-of-packed-member) |
|
|
|
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 |
|
|
|
# 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) |
|
|
|
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 += -Wframe-larger-than=$(CONFIG_FRAME_WARN) |
|
endif |
|
|
|
stackp-flags-y := -fno-stack-protector |
|
stackp-flags-$(CONFIG_STACKPROTECTOR) := -fstack-protector |
|
stackp-flags-$(CONFIG_STACKPROTECTOR_STRONG) := -fstack-protector-strong |
|
|
|
KBUILD_CFLAGS += $(stackp-flags-y) |
|
|
|
ifdef CONFIG_CC_IS_CLANG |
|
KBUILD_CPPFLAGS += -Qunused-arguments |
|
KBUILD_CFLAGS += -Wno-format-invalid-specifier |
|
KBUILD_CFLAGS += -Wno-gnu |
|
# 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 += -mno-global-merge |
|
else |
|
|
|
# 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=5,) |
|
endif |
|
|
|
# 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) |
|
|
|
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 |
|
|
|
# While VLAs have been removed, GCC produces unreachable stack probes |
|
# for the randomize_kstack_offset feature. Disable it for all compilers. |
|
KBUILD_CFLAGS += $(call cc-option, -fno-stack-clash-protection) |
|
|
|
DEBUG_CFLAGS := |
|
|
|
# Workaround for GCC versions < 5.0 |
|
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801 |
|
ifdef CONFIG_CC_IS_GCC |
|
DEBUG_CFLAGS += $(call cc-ifversion, -lt, 0500, $(call cc-option, -fno-var-tracking-assignments)) |
|
endif |
|
|
|
ifdef CONFIG_DEBUG_INFO |
|
|
|
ifdef CONFIG_DEBUG_INFO_SPLIT |
|
DEBUG_CFLAGS += -gsplit-dwarf |
|
else |
|
DEBUG_CFLAGS += -g |
|
endif |
|
|
|
ifneq ($(LLVM_IAS),1) |
|
KBUILD_AFLAGS += -Wa,-gdwarf-2 |
|
endif |
|
|
|
ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT |
|
dwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4 |
|
dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5 |
|
DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y) |
|
endif |
|
|
|
ifdef CONFIG_DEBUG_INFO_REDUCED |
|
DEBUG_CFLAGS += $(call cc-option, -femit-struct-debug-baseonly) \ |
|
$(call cc-option,-fno-var-tracking) |
|
endif |
|
|
|
ifdef CONFIG_DEBUG_INFO_COMPRESSED |
|
DEBUG_CFLAGS += -gz=zlib |
|
KBUILD_AFLAGS += -gz=zlib |
|
KBUILD_LDFLAGS += --compress-debug-sections=zlib |
|
endif |
|
|
|
endif # CONFIG_DEBUG_INFO |
|
|
|
KBUILD_CFLAGS += $(DEBUG_CFLAGS) |
|
export DEBUG_CFLAGS |
|
|
|
ifdef CONFIG_FUNCTION_TRACER |
|
ifdef CONFIG_FTRACE_MCOUNT_USE_CC |
|
CC_FLAGS_FTRACE += -mrecord-mcount |
|
ifdef CONFIG_HAVE_NOP_MCOUNT |
|
ifeq ($(call cc-option-yn, -mnop-mcount),y) |
|
CC_FLAGS_FTRACE += -mnop-mcount |
|
CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT |
|
endif |
|
endif |
|
endif |
|
ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL |
|
CC_FLAGS_USING += -DCC_USING_NOP_MCOUNT |
|
endif |
|
ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT |
|
ifdef CONFIG_HAVE_C_RECORDMCOUNT |
|
BUILD_C_RECORDMCOUNT := y |
|
export BUILD_C_RECORDMCOUNT |
|
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) |
|
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_SHADOW_CALL_STACK |
|
CC_FLAGS_SCS := -fsanitize=shadow-call-stack |
|
KBUILD_CFLAGS += $(CC_FLAGS_SCS) |
|
export CC_FLAGS_SCS |
|
endif |
|
|
|
ifdef CONFIG_LTO_CLANG |
|
ifdef CONFIG_LTO_CLANG_THIN |
|
CC_FLAGS_LTO := -flto=thin -fsplit-lto-unit |
|
KBUILD_LDFLAGS += --thinlto-cache-dir=$(extmod_prefix).thinlto-cache |
|
else |
|
CC_FLAGS_LTO := -flto |
|
endif |
|
CC_FLAGS_LTO += -fvisibility=hidden |
|
|
|
# Limit inlining across translation units to reduce binary size |
|
KBUILD_LDFLAGS += -mllvm -import-instr-limit=5 |
|
|
|
# Check for frame size exceeding threshold during prolog/epilog insertion |
|
# when using lld < 13.0.0. |
|
ifneq ($(CONFIG_FRAME_WARN),0) |
|
ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0) |
|
KBUILD_LDFLAGS += -plugin-opt=-warn-stack-size=$(CONFIG_FRAME_WARN) |
|
endif |
|
endif |
|
endif |
|
|
|
ifdef CONFIG_LTO |
|
KBUILD_CFLAGS += -fno-lto $(CC_FLAGS_LTO) |
|
KBUILD_AFLAGS += -fno-lto |
|
export CC_FLAGS_LTO |
|
endif |
|
|
|
ifdef CONFIG_CFI_CLANG |
|
CC_FLAGS_CFI := -fsanitize=cfi \ |
|
-fsanitize-cfi-cross-dso \ |
|
-fno-sanitize-cfi-canonical-jump-tables \ |
|
-fno-sanitize-trap=cfi \ |
|
-fno-sanitize-blacklist |
|
|
|
ifdef CONFIG_CFI_PERMISSIVE |
|
CC_FLAGS_CFI += -fsanitize-recover=cfi |
|
endif |
|
|
|
# If LTO flags are filtered out, we must also filter out CFI. |
|
CC_FLAGS_LTO += $(CC_FLAGS_CFI) |
|
KBUILD_CFLAGS += $(CC_FLAGS_CFI) |
|
export CC_FLAGS_CFI |
|
endif |
|
|
|
ifdef CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B |
|
KBUILD_CFLAGS += -falign-functions=64 |
|
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 += -Wdeclaration-after-statement |
|
|
|
# Variable Length Arrays (VLAs) should not be used anywhere in the kernel |
|
KBUILD_CFLAGS += -Wvla |
|
|
|
# disable pointer signed / unsigned warnings in gcc 4.0 |
|
KBUILD_CFLAGS += -Wno-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 += -fno-strict-overflow |
|
|
|
# Make sure -fstack-check isn't enabled (like gentoo apparently did) |
|
KBUILD_CFLAGS += -fno-stack-check |
|
|
|
# conserve stack if available |
|
KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) |
|
|
|
# Prohibit date/time macros, which would make the build non-deterministic |
|
KBUILD_CFLAGS += -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_CPPFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
|
|
|
# include additional Makefiles when needed |
|
include-y := scripts/Makefile.extrawarn |
|
include-$(CONFIG_KASAN) += scripts/Makefile.kasan |
|
include-$(CONFIG_KCSAN) += scripts/Makefile.kcsan |
|
include-$(CONFIG_UBSAN) += scripts/Makefile.ubsan |
|
include-$(CONFIG_KCOV) += scripts/Makefile.kcov |
|
include-$(CONFIG_GCC_PLUGINS) += scripts/Makefile.gcc-plugins |
|
|
|
include $(addprefix $(srctree)/, $(include-y)) |
|
|
|
# scripts/Makefile.gcc-plugins is intentionally included last. |
|
# Do not add $(call cc-option,...) below this line. When you build the kernel |
|
# from the clean source tree, the GCC plugins do not exist at this point. |
|
|
|
# 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=sha1 |
|
LDFLAGS_vmlinux += --build-id=sha1 |
|
|
|
ifeq ($(CONFIG_STRIP_ASM_SYMS),y) |
|
LDFLAGS_vmlinux += $(call ld-option, -X,) |
|
endif |
|
|
|
ifeq ($(CONFIG_RELR),y) |
|
LDFLAGS_vmlinux += --pack-dyn-relocs=relr --use-android-relr-tags |
|
endif |
|
|
|
# We never want expected sections to be placed heuristically by the |
|
# linker. All sections should be explicitly named in the linker script. |
|
ifdef CONFIG_LD_ORPHAN_WARN |
|
LDFLAGS_vmlinux += --orphan-handling=warn |
|
endif |
|
|
|
# Align the bit size of userspace programs with the kernel |
|
KBUILD_USERCFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) |
|
KBUILD_USERLDFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS)) |
|
|
|
# make the checker run with the right architecture |
|
CHECKFLAGS += --arch=$(ARCH) |
|
|
|
# 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 |
|
|
|
PHONY += prepare0 |
|
|
|
export extmod_prefix = $(if $(KBUILD_EXTMOD),$(KBUILD_EXTMOD)/) |
|
export MODORDER := $(extmod_prefix)modules.order |
|
export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps |
|
|
|
ifeq ($(KBUILD_EXTMOD),) |
|
core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/ block/ |
|
|
|
vmlinux-dirs := $(patsubst %/,%,$(filter %/, \ |
|
$(core-y) $(core-m) $(drivers-y) $(drivers-m) \ |
|
$(libs-y) $(libs-m))) |
|
|
|
vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \ |
|
$(patsubst %/,%,$(filter %/, $(core-) \ |
|
$(drivers-) $(libs-)))) |
|
|
|
subdir-modorder := $(addsuffix modules.order,$(filter %/, \ |
|
$(core-y) $(core-m) $(libs-y) $(libs-m) \ |
|
$(drivers-y) $(drivers-m))) |
|
|
|
build-dirs := $(vmlinux-dirs) |
|
clean-dirs := $(vmlinux-alldirs) |
|
|
|
# Externally visible symbols (used by link-vmlinux.sh) |
|
KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y)) |
|
KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y))) |
|
ifdef CONFIG_MODULES |
|
KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y))) |
|
KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y)) |
|
else |
|
KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y)) |
|
endif |
|
KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y)) |
|
|
|
export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS |
|
export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds |
|
# used by scripts/Makefile.package |
|
export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools) |
|
|
|
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 |
|
# 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) |
|
KBUILD_MODULES := 1 |
|
|
|
autoksyms_recursive: descend modules.order |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \ |
|
"$(MAKE) -f $(srctree)/Makefile vmlinux" |
|
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 |
|
+$(call if_changed_dep,link-vmlinux) |
|
|
|
targets := vmlinux |
|
|
|
# The actual objects are generated when descending, |
|
# make sure no implicit rule kicks in |
|
$(sort $(vmlinux-deps) $(subdir-modorder)): descend ; |
|
|
|
filechk_kernel.release = \ |
|
echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
|
|
|
# Store (new) KERNELRELEASE string in include/config/kernel.release |
|
include/config/kernel.release: 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 scripts_dtc |
|
$(Q)$(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 |
|
|
|
archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \ |
|
asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \ |
|
include/generated/autoconf.h remove-stale-files |
|
|
|
prepare0: archprepare |
|
$(Q)$(MAKE) $(build)=scripts/mod |
|
$(Q)$(MAKE) $(build)=. |
|
|
|
# All the preparing.. |
|
prepare: prepare0 |
|
|
|
PHONY += remove-stale-files |
|
remove-stale-files: |
|
$(Q)$(srctree)/scripts/remove-stale-files |
|
|
|
# Support for using generic headers in asm-generic |
|
asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj |
|
|
|
PHONY += asm-generic uapi-asm-generic |
|
asm-generic: uapi-asm-generic |
|
$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm \ |
|
generic=include/asm-generic |
|
uapi-asm-generic: |
|
$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm \ |
|
generic=include/uapi/asm-generic |
|
|
|
# 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 |
|
define filechk_utsrelease.h |
|
if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ |
|
echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ |
|
exit 1; \ |
|
fi; \ |
|
echo \#define UTS_RELEASE \"$(KERNELRELEASE)\" |
|
endef |
|
|
|
define filechk_version.h |
|
if [ $(SUBLEVEL) -gt 255 ]; then \ |
|
echo \#define LINUX_VERSION_CODE $(shell \ |
|
expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + 255); \ |
|
else \ |
|
echo \#define LINUX_VERSION_CODE $(shell \ |
|
expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \ |
|
fi; \ |
|
echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + \ |
|
((c) > 255 ? 255 : (c)))'; \ |
|
echo \#define LINUX_VERSION_MAJOR $(VERSION); \ |
|
echo \#define LINUX_VERSION_PATCHLEVEL $(PATCHLEVEL); \ |
|
echo \#define LINUX_VERSION_SUBLEVEL $(SUBLEVEL) |
|
endef |
|
|
|
$(version_h): PATCHLEVEL := $(if $(PATCHLEVEL), $(PATCHLEVEL), 0) |
|
$(version_h): SUBLEVEL := $(if $(SUBLEVEL), $(SUBLEVEL), 0) |
|
$(version_h): FORCE |
|
$(call filechk,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 |
|
|
|
quiet_cmd_headers_install = INSTALL $(INSTALL_HDR_PATH)/include |
|
cmd_headers_install = \ |
|
mkdir -p $(INSTALL_HDR_PATH); \ |
|
rsync -mrl --include='*/' --include='*\.h' --exclude='*' \ |
|
usr/include $(INSTALL_HDR_PATH) |
|
|
|
PHONY += headers_install |
|
headers_install: headers |
|
$(call cmd,headers_install) |
|
|
|
PHONY += archheaders archscripts |
|
|
|
hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj |
|
|
|
PHONY += headers |
|
headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts |
|
$(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ |
|
$(error Headers not exportable for the $(SRCARCH) architecture)) |
|
$(Q)$(MAKE) $(hdr-inst)=include/uapi |
|
$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi |
|
|
|
# Deprecated. It is no-op now. |
|
PHONY += headers_check |
|
headers_check: |
|
@echo >&2 "=================== WARNING ===================" |
|
@echo >&2 "Since Linux 5.5, 'make headers_check' is no-op," |
|
@echo >&2 "and will be removed after Linux 5.15 release." |
|
@echo >&2 "Please remove headers_check from your scripts." |
|
@echo >&2 "===============================================" |
|
|
|
ifdef CONFIG_HEADERS_INSTALL |
|
prepare: headers |
|
endif |
|
|
|
PHONY += scripts_unifdef |
|
scripts_unifdef: scripts_basic |
|
$(Q)$(MAKE) $(build)=scripts scripts/unifdef |
|
|
|
# --------------------------------------------------------------------------- |
|
# Tools |
|
|
|
ifdef CONFIG_STACK_VALIDATION |
|
prepare: tools/objtool |
|
endif |
|
|
|
ifdef CONFIG_BPF |
|
ifdef CONFIG_DEBUG_INFO_BTF |
|
prepare: tools/bpf/resolve_btfids |
|
endif |
|
endif |
|
|
|
PHONY += resolve_btfids_clean |
|
|
|
resolve_btfids_O = $(abspath $(objtree))/tools/bpf/resolve_btfids |
|
|
|
# tools/bpf/resolve_btfids directory might not exist |
|
# in output directory, skip its clean in that case |
|
resolve_btfids_clean: |
|
ifneq ($(wildcard $(resolve_btfids_O)),) |
|
$(Q)$(MAKE) -sC $(srctree)/tools/bpf/resolve_btfids O=$(resolve_btfids_O) clean |
|
endif |
|
|
|
# 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 $(srctree)/tools/ |
|
|
|
tools/%: FORCE |
|
$(Q)mkdir -p $(objtree)/tools |
|
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS="$(tools_silent) $(filter --j% -j,$(MAKEFLAGS))" O=$(abspath $(objtree)) subdir=tools -C $(srctree)/tools/ $* |
|
|
|
# --------------------------------------------------------------------------- |
|
# Kernel selftest |
|
|
|
PHONY += kselftest |
|
kselftest: |
|
$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests run_tests |
|
|
|
kselftest-%: FORCE |
|
$(Q)$(MAKE) -C $(srctree)/tools/testing/selftests $* |
|
|
|
PHONY += kselftest-merge |
|
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 $(srctree)/Makefile olddefconfig |
|
|
|
# --------------------------------------------------------------------------- |
|
# Devicetree files |
|
|
|
ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/boot/dts/),) |
|
dtstree := arch/$(SRCARCH)/boot/dts |
|
endif |
|
|
|
ifneq ($(dtstree),) |
|
|
|
%.dtb: include/config/kernel.release scripts_dtc |
|
$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
|
|
|
%.dtbo: include/config/kernel.release scripts_dtc |
|
$(Q)$(MAKE) $(build)=$(dtstree) $(dtstree)/$@ |
|
|
|
PHONY += dtbs dtbs_install dtbs_check |
|
dtbs: include/config/kernel.release scripts_dtc |
|
$(Q)$(MAKE) $(build)=$(dtstree) |
|
|
|
ifneq ($(filter dtbs_check, $(MAKECMDGOALS)),) |
|
export CHECK_DTBS=y |
|
dtbs: dt_binding_check |
|
endif |
|
|
|
dtbs_check: dtbs |
|
|
|
dtbs_install: |
|
$(Q)$(MAKE) $(dtbinst)=$(dtstree) dst=$(INSTALL_DTBS_PATH) |
|
|
|
ifdef CONFIG_OF_EARLY_FLATTREE |
|
all: dtbs |
|
endif |
|
|
|
endif |
|
|
|
PHONY += scripts_dtc |
|
scripts_dtc: scripts_basic |
|
$(Q)$(MAKE) $(build)=scripts/dtc |
|
|
|
ifneq ($(filter dt_binding_check, $(MAKECMDGOALS)),) |
|
export CHECK_DT_BINDING=y |
|
endif |
|
|
|
PHONY += dt_binding_check |
|
dt_binding_check: scripts_dtc |
|
$(Q)$(MAKE) $(build)=Documentation/devicetree/bindings |
|
|
|
# --------------------------------------------------------------------------- |
|
# 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: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare |
|
|
|
cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@ |
|
|
|
modules.order: $(subdir-modorder) FORCE |
|
$(call if_changed,modules_order) |
|
|
|
targets += modules.order |
|
|
|
# Target to prepare building external modules |
|
PHONY += modules_prepare |
|
modules_prepare: prepare |
|
$(Q)$(MAKE) $(build)=scripts scripts/module.lds |
|
|
|
export modules_sign_only := |
|
|
|
ifeq ($(CONFIG_MODULE_SIG),y) |
|
PHONY += modules_sign |
|
modules_sign: modules_install |
|
@: |
|
|
|
# modules_sign is a subset of modules_install. |
|
# 'make modules_install modules_sign' is equivalent to 'make modules_install'. |
|
ifeq ($(filter modules_install,$(MAKECMDGOALS)),) |
|
modules_sign_only := y |
|
endif |
|
endif |
|
|
|
modinst_pre := |
|
ifneq ($(filter modules_install,$(MAKECMDGOALS)),) |
|
modinst_pre := __modinst_pre |
|
endif |
|
|
|
modules_install: $(modinst_pre) |
|
PHONY += __modinst_pre |
|
__modinst_pre: |
|
@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 |
|
@sed 's:^:kernel/:' modules.order > $(MODLIB)/modules.order |
|
@cp -f modules.builtin $(MODLIB)/ |
|
@cp -f $(objtree)/modules.builtin.modinfo $(MODLIB)/ |
|
|
|
endif # CONFIG_MODULES |
|
|
|
### |
|
# Cleaning is done on three levels. |
|
# make clean Delete most generated files |
|
# Leave enough to build external modules |
|
# make mrproper Delete the current configuration, and all generated files |
|
# make distclean Remove editor backup files, patch leftover files and the like |
|
|
|
# Directories & files removed with 'make clean' |
|
CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \ |
|
modules.builtin modules.builtin.modinfo modules.nsdeps \ |
|
compile_commands.json .thinlto-cache |
|
|
|
# Directories & files removed with 'make mrproper' |
|
MRPROPER_FILES += include/config include/generated \ |
|
arch/$(SRCARCH)/include/generated .tmp_objdiff \ |
|
debian snap tar-install \ |
|
.config .config.old .version \ |
|
Module.symvers \ |
|
certs/signing_key.pem certs/signing_key.x509 \ |
|
certs/x509.genkey \ |
|
vmlinux-gdb.py \ |
|
*.spec |
|
|
|
# clean - Delete most, but leave enough to build external modules |
|
# |
|
clean: rm-files := $(CLEAN_FILES) |
|
|
|
PHONY += archclean vmlinuxclean |
|
|
|
vmlinuxclean: |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/link-vmlinux.sh clean |
|
$(Q)$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) clean) |
|
|
|
clean: archclean vmlinuxclean resolve_btfids_clean |
|
|
|
# mrproper - Delete all generated files, including .config |
|
# |
|
mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) |
|
mrproper-dirs := $(addprefix _mrproper_,scripts) |
|
|
|
PHONY += $(mrproper-dirs) mrproper |
|
$(mrproper-dirs): |
|
$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) |
|
|
|
mrproper: clean $(mrproper-dirs) |
|
$(call cmd,rmfiles) |
|
|
|
# distclean |
|
# |
|
PHONY += distclean |
|
|
|
distclean: mrproper |
|
@find . $(RCS_FIND_IGNORE) \ |
|
\( -name '*.orig' -o -name '*.rej' -o -name '*~' \ |
|
-o -name '*.bak' -o -name '#*#' -o -name '*%' \ |
|
-o -name 'core' -o -name tags -o -name TAGS -o -name 'cscope*' \ |
|
-o -name GPATH -o -name GRTAGS -o -name GSYMS -o -name GTAGS \) \ |
|
-type f -print | xargs rm -f |
|
|
|
|
|
# Packaging of the kernel to various formats |
|
# --------------------------------------------------------------------------- |
|
|
|
%src-pkg: FORCE |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
|
%pkg: include/config/kernel.release FORCE |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.package $@ |
|
|
|
# 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: $(INSTALL_HDR_PATH))'; \ |
|
echo '' |
|
@echo 'Static analysers:' |
|
@echo ' checkstack - Generate a list of stack hogs' |
|
@echo ' versioncheck - Sanity check on version.h usage' |
|
@echo ' includecheck - Check for duplicate included header files' |
|
@echo ' export_report - List the usages of all exported symbols' |
|
@echo ' headerdep - Detect inclusion cycles in headers' |
|
@echo ' coccicheck - Check with Coccinelle' |
|
@echo ' clang-analyzer - Check with clang static analyzer' |
|
@echo ' clang-tidy - Check with clang-tidy' |
|
@echo '' |
|
@echo 'Tools:' |
|
@echo ' nsdeps - Generate missing symbol namespace dependencies' |
|
@echo '' |
|
@echo 'Kernel selftest:' |
|
@echo ' kselftest - Build and run kernel selftest' |
|
@echo ' Build, install, and boot kernel before' |
|
@echo ' running kselftest on it' |
|
@echo ' Run as root for full coverage' |
|
@echo ' kselftest-all - Build kernel selftest' |
|
@echo ' kselftest-install - Build and install kernel selftest' |
|
@echo ' kselftest-clean - Remove all generated kselftest files' |
|
@echo ' kselftest-merge - Merge all the config dependencies of' |
|
@echo ' kselftest to existing .config.' |
|
@echo '' |
|
@$(if $(dtstree), \ |
|
echo 'Devicetree:'; \ |
|
echo '* dtbs - Build device tree blobs for enabled boards'; \ |
|
echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'; \ |
|
echo ' dt_binding_check - Validate device tree binding documents'; \ |
|
echo ' dtbs_check - Validate device tree source files';\ |
|
echo '') |
|
|
|
@echo 'Userspace tools targets:' |
|
@echo ' use "make tools/help"' |
|
@echo ' or "cd tools; make help"' |
|
@echo '' |
|
@echo 'Kernel packaging:' |
|
@$(MAKE) -f $(srctree)/scripts/Makefile.package help |
|
@echo '' |
|
@echo 'Documentation targets:' |
|
@$(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 " %-27s - 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 $$CHECK' |
|
@echo ' (sparse by default)' |
|
@echo ' make C=2 [targets] Force check of all c source with $$CHECK' |
|
@echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections' |
|
@echo ' make W=n [targets] Enable extra 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' |
|
@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): |
|
$(Q)$(MAKE) $(build)=Documentation $@ |
|
|
|
# Misc |
|
# --------------------------------------------------------------------------- |
|
|
|
PHONY += scripts_gdb |
|
scripts_gdb: prepare0 |
|
$(Q)$(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 |
|
|
|
### |
|
# 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. |
|
|
|
# We are always building only modules. |
|
KBUILD_BUILTIN := |
|
KBUILD_MODULES := 1 |
|
|
|
build-dirs := $(KBUILD_EXTMOD) |
|
$(MODORDER): descend |
|
@: |
|
|
|
compile_commands.json: $(extmod_prefix)compile_commands.json |
|
PHONY += compile_commands.json |
|
|
|
clean-dirs := $(KBUILD_EXTMOD) |
|
clean: rm-files := $(KBUILD_EXTMOD)/Module.symvers $(KBUILD_EXTMOD)/modules.nsdeps \ |
|
$(KBUILD_EXTMOD)/compile_commands.json $(KBUILD_EXTMOD)/.thinlto-cache |
|
|
|
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 '' |
|
|
|
# no-op for external module builds |
|
PHONY += prepare modules_prepare |
|
|
|
endif # KBUILD_EXTMOD |
|
|
|
# --------------------------------------------------------------------------- |
|
# Modules |
|
|
|
PHONY += modules modules_install |
|
|
|
ifdef CONFIG_MODULES |
|
|
|
modules: modules_check |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost |
|
|
|
PHONY += modules_check |
|
modules_check: $(MODORDER) |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/modules-check.sh $< |
|
|
|
quiet_cmd_depmod = DEPMOD $(MODLIB) |
|
cmd_depmod = $(CONFIG_SHELL) $(srctree)/scripts/depmod.sh $(DEPMOD) \ |
|
$(KERNELRELEASE) |
|
|
|
modules_install: |
|
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst |
|
$(call cmd,depmod) |
|
|
|
else # CONFIG_MODULES |
|
|
|
# Modules not configured |
|
# --------------------------------------------------------------------------- |
|
|
|
modules modules_install: |
|
@echo >&2 '***' |
|
@echo >&2 '*** The present kernel configuration has modules disabled.' |
|
@echo >&2 '*** To use the module feature, please run "make menuconfig" etc.' |
|
@echo >&2 '*** to enable CONFIG_MODULES.' |
|
@echo >&2 '***' |
|
@exit 1 |
|
|
|
endif # CONFIG_MODULES |
|
|
|
# Single targets |
|
# --------------------------------------------------------------------------- |
|
# To build individual files in subdirectories, you can do like this: |
|
# |
|
# make foo/bar/baz.s |
|
# |
|
# 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/ |
|
|
|
ifdef single-build |
|
|
|
# .ko is special because modpost is needed |
|
single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS))) |
|
single-no-ko := $(sort $(patsubst %.ko,%.mod, $(MAKECMDGOALS))) |
|
|
|
$(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) modules_prepare |
|
$(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)) |
|
|
|
# trim unrelated directories |
|
build-dirs := $(foreach d, $(build-dirs), \ |
|
$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d))) |
|
|
|
endif |
|
|
|
ifndef CONFIG_MODULES |
|
KBUILD_MODULES := |
|
endif |
|
|
|
# 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=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \ |
|
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,rmfiles) |
|
@find $(if $(KBUILD_EXTMOD), $(KBUILD_EXTMOD), .) $(RCS_FIND_IGNORE) \ |
|
\( -name '*.[aios]' -o -name '*.ko' -o -name '.*.cmd' \ |
|
-o -name '*.ko.*' \ |
|
-o -name '*.dtb' -o -name '*.dtbo' -o -name '*.dtb.S' -o -name '*.dt.yaml' \ |
|
-o -name '*.dwo' -o -name '*.lst' \ |
|
-o -name '*.su' -o -name '*.mod' \ |
|
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \ |
|
-o -name '*.lex.c' -o -name '*.tab.[ch]' \ |
|
-o -name '*.asn1.[ch]' \ |
|
-o -name '*.symtypes' -o -name 'modules.order' \ |
|
-o -name '.tmp_*.o.*' \ |
|
-o -name '*.c.[012]*.*' \ |
|
-o -name '*.ll' \ |
|
-o -name '*.gcno' \ |
|
-o -name '*.*.symversions' \) -type f -print | xargs rm -f |
|
|
|
# Generate tags for editors |
|
# --------------------------------------------------------------------------- |
|
quiet_cmd_tags = GEN $@ |
|
cmd_tags = $(BASH) $(srctree)/scripts/tags.sh $@ |
|
|
|
tags TAGS cscope gtags: FORCE |
|
$(call cmd,tags) |
|
|
|
# Script to generate missing namespace dependencies |
|
# --------------------------------------------------------------------------- |
|
|
|
PHONY += nsdeps |
|
nsdeps: export KBUILD_NSDEPS=1 |
|
nsdeps: modules |
|
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/nsdeps |
|
|
|
# Clang Tooling |
|
# --------------------------------------------------------------------------- |
|
|
|
quiet_cmd_gen_compile_commands = GEN $@ |
|
cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs)) |
|
|
|
$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \ |
|
$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \ |
|
$(if $(CONFIG_MODULES), $(MODORDER)) FORCE |
|
$(call if_changed,gen_compile_commands) |
|
|
|
targets += $(extmod_prefix)compile_commands.json |
|
|
|
PHONY += clang-tidy clang-analyzer |
|
|
|
ifdef CONFIG_CC_IS_CLANG |
|
quiet_cmd_clang_tools = CHECK $< |
|
cmd_clang_tools = $(PYTHON3) $(srctree)/scripts/clang-tools/run-clang-tools.py $@ $< |
|
|
|
clang-tidy clang-analyzer: $(extmod_prefix)compile_commands.json |
|
$(call cmd,clang_tools) |
|
else |
|
clang-tidy clang-analyzer: |
|
@echo "$@ requires CC=clang" >&2 |
|
@false |
|
endif |
|
|
|
# Scripts to check various things for consistency |
|
# --------------------------------------------------------------------------- |
|
|
|
PHONY += includecheck versioncheck coccicheck 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: |
|
$(Q)$(BASH) $(srctree)/scripts/$@ |
|
|
|
export_report: |
|
$(PERL) $(srctree)/scripts/export_report.pl |
|
|
|
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 $$(find . -name '*.ko') | \ |
|
$(PERL) $(srctree)/scripts/checkstack.pl $(CHECKSTACK_ARCH) |
|
|
|
kernelrelease: |
|
@echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))" |
|
|
|
kernelversion: |
|
@echo $(KERNELVERSION) |
|
|
|
image_name: |
|
@echo $(KBUILD_IMAGE) |
|
|
|
quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) |
|
cmd_rmfiles = rm -rf $(rm-files) |
|
|
|
# read saved command lines for existing targets |
|
existing-targets := $(wildcard $(sort $(targets))) |
|
|
|
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) |
|
|
|
endif # config-build |
|
endif # mixed-build |
|
endif # need-sub-make |
|
|
|
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)
|
|
|