mirror of
https://github.com/ivoszbg/uniLoader.git
synced 2024-11-10 06:00:07 +00:00
525 lines
17 KiB
Makefile
525 lines
17 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# *DOCUMENTATION*
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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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# Do not:
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# o 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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# o print "Entering directory ...";
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ARCH ?= aarch64
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MAKEFLAGS += -rR --no-print-directory
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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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# kbuild supports saving output files in a separate directory.
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# To locate output files in a separate directory two syntaxes are supported.
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# In both cases the working directory must be the root of the kernel src.
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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 directory
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# where the output files shall be placed.
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# export KBUILD_OUTPUT=dir/to/store/output/files/
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# 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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# Our default target
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PHONY := _all
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_all:
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# KBUILD_SRC is set on invocation of make in OBJ directory
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# KBUILD_SRC is not intended to be used by the regular user (for now)
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ifeq ($(KBUILD_SRC),)
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# OK, Make called in directory where kernel src resides
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# Do we want to locate output files in a separate directory?
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ifeq ("$(origin O)", "command line")
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KBUILD_OUTPUT := $(O)
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endif
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ifeq ("$(origin W)", "command line")
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export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W)
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endif
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# Cancel implicit rules on top Makefile
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$(CURDIR)/Makefile Makefile: ;
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ifneq ($(KBUILD_OUTPUT),)
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# Invoke a second make in the output directory, passing relevant variables
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# check that the output directory actually exists
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saved-output := $(KBUILD_OUTPUT)
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KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
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$(if $(KBUILD_OUTPUT),, \
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$(error output directory "$(saved-output)" does not exist))
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PHONY += $(MAKECMDGOALS) sub-make
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$(filter-out _all sub-make $(CURDIR)/Makefile, $(MAKECMDGOALS)) _all: sub-make
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$(Q)@:
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sub-make: FORCE
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$(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
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KBUILD_SRC=$(CURDIR) \
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-f $(CURDIR)/Makefile \
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$(filter-out _all sub-make,$(MAKECMDGOALS))
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# Leave processing to above invocation of make
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skip-makefile := 1
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endif # ifneq ($(KBUILD_OUTPUT),)
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endif # ifeq ($(KBUILD_SRC),)
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# We process the rest of the Makefile if this is the final invocation of make
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ifeq ($(skip-makefile),)
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# If building an external module we do not care about the all: rule
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# but instead _all depend on modules
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PHONY += all
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_all: all
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srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
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objtree := $(CURDIR)
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src := $(srctree)
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obj := $(objtree)
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VPATH := $(srctree)
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export srctree objtree VPATH
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CROSS_COMPILE ?= $(CONFIG_CROSS_COMPILE:"%"=%)
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KERNEL_PATH ?= $(CONFIG_KERNEL_PATH:"%"=%)
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DT_PATH ?= $(CONFIG_DT_PATH:"%"=%)
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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 := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
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else if [ -x /bin/bash ]; then echo /bin/bash; \
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else echo sh; fi ; fi)
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HOSTCC = gcc
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HOSTCXX = g++
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HOSTCFLAGS = -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -Wno-builtin-declaration-mismatch
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HOSTCXXFLAGS = -O2
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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 $@ :<
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#
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# If KBUILD_VERBOSE equals 0 then the above command will be hidden.
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# If KBUILD_VERBOSE equals 1 then the above command is displayed.
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ifeq ($(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 ($(findstring s,$(MAKEFLAGS)),)
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quiet=silent_
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endif
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export quiet Q KBUILD_VERBOSE
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# Look for make include files relative to root of kernel src
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MAKEFLAGS += --include-dir=$(srctree)
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# We need some generic definitions (do not try to remake the file).
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$(srctree)/scripts/Kbuild.include: ;
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include $(srctree)/scripts/Kbuild.include
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# Make variables (CC, etc...)
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AS = $(CROSS_COMPILE)as
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LD = $(CROSS_COMPILE)ld
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CC = $(CROSS_COMPILE)gcc
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CPP = $(CC) -E
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AR = $(CROSS_COMPILE)ar
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NM = $(CROSS_COMPILE)nm
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STRIP = $(CROSS_COMPILE)strip
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OBJCOPY = $(CROSS_COMPILE)objcopy
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OBJDUMP = $(CROSS_COMPILE)objdump
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AWK = awk
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INSTALLKERNEL := installkernel
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PERL = perl
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CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
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-Wbitwise -Wno-return-void $(CF)
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CFLAGS_KERNEL =
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AFLAGS_KERNEL =
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# Use LINUXINCLUDE when you must reference the include/ directory.
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# Needed to be compatible with the O= option
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LINUXINCLUDE := -Iinclude \
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$(if $(KBUILD_SRC), -I$(srctree)/include) \
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-include include/generated/autoconf.h
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KBUILD_CPPFLAGS := -D__KERNEL__
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KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
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-fno-strict-aliasing -fno-common \
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-Werror-implicit-function-declaration \
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-Wno-format-security \
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-fno-delete-null-pointer-checks \
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-Wno-builtin-declaration-mismatch -Wno-main
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KBUILD_AFLAGS_KERNEL :=
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KBUILD_CFLAGS_KERNEL :=
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KBUILD_AFLAGS := -D__ASSEMBLY__
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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 ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
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export CPP AR NM STRIP OBJCOPY OBJDUMP
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export MAKE AWK GENKSYMS INSTALLKERNEL PERL UTS_MACHINE
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export HOSTCXX HOSTCXXFLAGS
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export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
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export KBUILD_CFLAGS CFLAGS_KERNEL
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export KBUILD_AFLAGS AFLAGS_KERNEL
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export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
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export KBUILD_ARFLAGS
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# Files to ignore in find ... statements
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RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
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# ===========================================================================
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# Rules shared between *config targets and build targets
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# Basic helpers built in scripts/
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PHONY += scripts_basic
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scripts_basic:
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$(Q)$(MAKE) $(build)=scripts/basic
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# To avoid any implicit rule to kick in, define an empty command.
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scripts/basic/%: scripts_basic ;
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PHONY += outputmakefile
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# outputmakefile generates a Makefile in the output directory, if using a
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# separate output directory. This allows convenient use of make in the
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# output directory.
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outputmakefile:
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ifneq ($(KBUILD_SRC),)
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$(Q)ln -fsn $(srctree) source
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$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
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$(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
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endif
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# To make sure we do not include .config for any of the *config targets
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# catch them early, and hand them over to scripts/kconfig/Makefile
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# It is allowed to specify more targets when calling make, including
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# mixing *config targets and build targets.
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# For example 'make oldconfig all'.
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# Detect when mixed targets is specified, and make a second invocation
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# of make so .config is not included in this case either (for *config).
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no-dot-config-targets := clean mrproper distclean \
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cscope gtags TAGS tags help %docs check% coccicheck \
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include/linux/version.h headers_% \
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kernelversion %src-pkg
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config-targets := 0
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mixed-targets := 0
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dot-config := 1
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ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
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ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
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dot-config := 0
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endif
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endif
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ifneq ($(filter config %config,$(MAKECMDGOALS)),)
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config-targets := 1
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ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
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mixed-targets := 1
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endif
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endif
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ifeq ($(mixed-targets),1)
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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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%:: FORCE
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$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
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else
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ifeq ($(config-targets),1)
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# ===========================================================================
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# *config targets only - make sure prerequisites are updated, and descend
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# in scripts/kconfig to make the *config target
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# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
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# KBUILD_DEFCONFIG may point out an alternative default configuration
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# used for 'make defconfig'
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#include $(srctree)/arch/$(SRCARCH)/Makefile
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export KBUILD_DEFCONFIG KBUILD_KCONFIG
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config: scripts_basic outputmakefile FORCE
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$(Q)mkdir -p include/linux include/config
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$(Q)$(MAKE) $(build)=scripts/kconfig $@
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%config: scripts_basic outputmakefile FORCE
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$(Q)mkdir -p include/linux include/config
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$(Q)$(MAKE) $(build)=scripts/kconfig $@
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else
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ifeq ($(dot-config),1)
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# Read in config
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-include include/config/auto.conf
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# Read in dependencies to all Kconfig* files, make sure to run
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# oldconfig if changes are detected.
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-include include/config/auto.conf.cmd
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# To avoid any implicit rule to kick in, define an empty command
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$(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
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# If .config is newer than include/config/auto.conf, someone tinkered
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# with it and forgot to run make oldconfig.
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# if auto.conf.cmd is missing then we are probably in a cleaned tree so
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# we execute the config step to be sure to catch updated Kconfig files
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include/config/%.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
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$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
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else
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# Dummy target needed, because used as prerequisite
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include/config/auto.conf: ;
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endif # $(dot-config)
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# The all: target is the default when no target is given on the
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# command line.
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# This allow a user to issue only 'make' to build a kernel including modules
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# Defaults to vmlinux, but the arch makefile usually adds further targets
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all: arch/$(ARCH)/linker.lds uniLoader
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# List of main executables
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main-y := main/main.o
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main-y += arch/$(ARCH)/Start.o
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# Object directories
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objs-y := main
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objs-y += arch
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libs-y := soc
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libs-y += board
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libs-y += lib
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uniLoader-dirs := $(objs-y) $(libs-y)
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uniLoader-objs := $(patsubst %,%/built-in.o, $(objs-y))
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uniLoader-mains := $(objs-y)/*.o
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uniLoader-libs := $(patsubst %,%/lib.a, $(libs-y))
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uniLoader-all := $(uniLoader-objs) $(uniLoader-libs)
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# Do modpost on a prelinked vmlinux. The finally linked vmlinux has
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# relevant sections renamed as per the linker script.
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quiet_cmd_uniLoader = LD $@.o
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cmd_uniLoader = $(LD) $(main-y) $(uniLoader-libs) -o $@.o --script=arch/$(ARCH)/linker.lds
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arch/$(ARCH)/linker.lds: arch/$(ARCH)/linker.lds.S $(KERNEL_PATH)
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$(CPP) $< -DKERNEL_PATH=$(KERNEL_PATH) -DDTB_PATH=$(DT_PATH) -P -o $@
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uniLoader: $(uniLoader-all)
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$(call if_changed,uniLoader)
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@echo ' OBJCOPY $@'
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$(OBJCOPY) -O binary uniLoader.o uniLoader
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# The actual objects are generated when descending,
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# make sure no implicit rule kicks in
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$(sort $(uniLoader-all)): $(uniLoader-dirs) ;
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# Handle descending into subdirectories listed in $(vmlinux-dirs)
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# Preset locale variables to speed up the build process. Limit locale
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# tweaks to this spot to avoid wrong language settings when running
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# make menuconfig etc.
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# Error messages still appears in the original language
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#PHONY += $(vmlinux-dirs)
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#$(vmlinux-dirs): prepare scripts
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PHONY += $(uniLoader-dirs)
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$(uniLoader-dirs): scripts_basic
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$(Q)$(MAKE) $(build)=$@
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###
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# Cleaning is done on three levels.
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# make clean Delete most generated files
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# Leave enough to build external modules
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# make mrproper Delete the current configuration, and all generated files
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# make distclean Remove editor backup files, patch leftover files and the like
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# Directories & files removed with 'make clean'
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CLEAN_DIRS +=
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CLEAN_FILES += uniLoader
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# Directories & files removed with 'make mrproper'
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MRPROPER_DIRS += include/config include/generated
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MRPROPER_FILES += .config .config.old tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS
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# clean - Delete most, but leave enough to build external modules
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#
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clean: rm-dirs := $(CLEAN_DIRS)
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clean: rm-files := $(CLEAN_FILES)
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clean-dirs := $(addprefix _clean_, $(uniLoader-dirs))
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PHONY += $(clean-dirs) clean archclean
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$(clean-dirs):
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$(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
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clean: $(clean-dirs)
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$(call cmd,rmdirs)
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$(call cmd,rmfiles)
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@find . $(RCS_FIND_IGNORE) \
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\( -name '*.[oas]' -o -name '.*.cmd' \
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-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' -o -name '*.lds' \
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-o -name modules.builtin -o -name '.tmp_*.o.*' \
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-o -name '*.gcno' \) -type f -print | xargs rm -f
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# mrproper - Delete all generated files, including .config
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#
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mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
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mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
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mrproper-dirs := $(addprefix _mrproper_, scripts)
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PHONY += $(mrproper-dirs) mrproper
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$(mrproper-dirs):
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$(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
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mrproper: clean $(mrproper-dirs)
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$(call cmd,rmdirs)
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$(call cmd,rmfiles)
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# distclean
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#
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PHONY += distclean
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distclean: mrproper
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@find $(srctree) $(RCS_FIND_IGNORE) \
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\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
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-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
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-o -name '.*.rej' -o -size 0 \
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-o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
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-type f -print | xargs rm -f
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# FIXME Should go into a make.lib or something
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# ===========================================================================
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quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
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cmd_rmdirs = rm -rf $(rm-dirs)
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quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
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cmd_rmfiles = rm -f $(rm-files)
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
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# Usage:
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# $(Q)$(MAKE) $(clean)=dir
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clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
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help:
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@echo 'Cleaning targets:'
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@echo ' clean - Remove most generated files but keep the config and'
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@echo ' enough build support to build external modules'
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@echo ' mrproper - Remove all generated files + config + various backup files'
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@echo ' distclean - mrproper + remove editor backup and patch files'
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@echo ''
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@echo 'Configuration targets:'
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@$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
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@echo ''
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@echo 'Other generic targets:'
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@echo ' all - Build all targets marked with [*]'
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@echo '* uniLoader - Build the application'
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@echo ' dir/ - Build all files in dir and below'
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@echo ' dir/file.[oisS] - Build specified target only'
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@echo ' dir/file.lst - Build specified mixed source/assembly target only'
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@echo ' (requires a recent binutils and recent build (System.map))'
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@echo ' tags/TAGS - Generate tags file for editors'
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@echo ' cscope - Generate cscope index'
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@echo ' gtags - Generate GNU GLOBAL index'
|
|
@echo ' kernelrelease - Output the release version string'
|
|
@echo ' kernelversion - Output the version stored in Makefile'
|
|
echo ''
|
|
@echo 'Static analysers'
|
|
@echo ' checkstack - Generate a list of stack hogs'
|
|
@echo ' namespacecheck - Name space analysis on compiled kernel'
|
|
@echo ' versioncheck - Sanity check on version.h usage'
|
|
@echo ' includecheck - Check for duplicate included header files'
|
|
@echo ' export_report - List the usages of all exported symbols'
|
|
@echo ' headers_check - Sanity check on exported headers'
|
|
# @$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help
|
|
@echo ''
|
|
# @echo 'Kernel packaging:'
|
|
# @$(MAKE) $(build)=$(package-dir) help
|
|
@echo ''
|
|
# @echo 'Documentation targets:'
|
|
# @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
|
|
@echo ''
|
|
@echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
|
|
@echo ' make V=2 [targets] 2 => give reason for rebuild of target'
|
|
@echo ' make O=dir [targets] Locate all output files in "dir", including .config'
|
|
@echo ' make W=n [targets] Enable extra gcc checks, n=1,2,3 where'
|
|
@echo ' 1: warnings which may be relevant and do not occur too often'
|
|
@echo ' 2: warnings which occur quite often but may still be relevant'
|
|
@echo ' 3: more obscure warnings, can most likely be ignored'
|
|
@echo ' Multiple levels can be combined with W=12 or W=123'
|
|
@echo ' make RECORDMCOUNT_WARN=1 [targets] Warn about ignored mcount sections'
|
|
@echo ''
|
|
@echo 'Execute "make" or "make all" to build all targets marked with [*] '
|
|
@echo 'For further info see the ./README file'
|
|
|
|
|
|
endif #ifeq ($(config-targets),1)
|
|
endif #ifeq ($(mixed-targets),1)
|
|
|
|
endif # skip-makefile
|
|
|
|
PHONY += FORCE
|
|
FORCE:
|
|
|
|
# Declare the contents of the .PHONY variable as phony. We keep that
|
|
# information in a variable so we can use it in if_changed and friends.
|
|
.PHONY: $(PHONY)
|