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458 lines
14 KiB
458 lines
14 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# ========================================================================== |
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# Building |
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# ========================================================================== |
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# Modified for U-Boot |
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prefix := tpl |
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src := $(patsubst $(prefix)/%,%,$(obj)) |
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ifeq ($(obj),$(src)) |
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prefix := spl |
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src := $(patsubst $(prefix)/%,%,$(obj)) |
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ifeq ($(obj),$(src)) |
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prefix := . |
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endif |
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endif |
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PHONY := __build |
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__build: |
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# Init all relevant variables used in kbuild files so |
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# 1) they have correct type |
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# 2) they do not inherit any value from the environment |
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obj-y := |
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obj-m := |
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lib-y := |
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lib-m := |
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always := |
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targets := |
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subdir-y := |
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subdir-m := |
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EXTRA_AFLAGS := |
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EXTRA_CFLAGS := |
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EXTRA_CPPFLAGS := |
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EXTRA_LDFLAGS := |
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asflags-y := |
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ccflags-y := |
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cppflags-y := |
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ldflags-y := |
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subdir-asflags-y := |
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subdir-ccflags-y := |
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# Read auto.conf if it exists, otherwise ignore |
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# Modified for U-Boot |
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-include include/config/auto.conf |
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-include $(prefix)/include/autoconf.mk |
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include scripts/Makefile.uncmd_spl |
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include scripts/Kbuild.include |
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# For backward compatibility check that these variables do not change |
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save-cflags := $(CFLAGS) |
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# The filename Kbuild has precedence over Makefile |
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kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) |
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kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) |
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include $(kbuild-file) |
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# Added for U-Boot |
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asflags-y += $(PLATFORM_CPPFLAGS) |
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ccflags-y += $(PLATFORM_CPPFLAGS) |
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cppflags-y += $(PLATFORM_CPPFLAGS) |
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# If the save-* variables changed error out |
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ifeq ($(KBUILD_NOPEDANTIC),) |
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ifneq ("$(save-cflags)","$(CFLAGS)") |
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$(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y) |
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endif |
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endif |
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include scripts/Makefile.lib |
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ifdef host-progs |
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ifneq ($(hostprogs-y),$(host-progs)) |
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$(warning kbuild: $(obj)/Makefile - Usage of host-progs is deprecated. Please replace with hostprogs-y!) |
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hostprogs-y += $(host-progs) |
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endif |
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endif |
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# Do not include host rules unless needed |
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ifneq ($(hostprogs-y)$(hostprogs-m),) |
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include scripts/Makefile.host |
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endif |
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# Uncommented for U-Boot |
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# We need to create output dicrectory for SPL and TPL even for in-tree build |
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#ifneq ($(KBUILD_SRC),) |
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# Create output directory if not already present |
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_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) |
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# Create directories for object files if directory does not exist |
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# Needed when obj-y := dir/file.o syntax is used |
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_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d))) |
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#endif |
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ifndef obj |
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$(warning kbuild: Makefile.build is included improperly) |
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endif |
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# =========================================================================== |
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ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) |
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lib-target := $(obj)/lib.a |
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endif |
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ifneq ($(strip $(obj-y) $(obj-m) $(obj-) $(subdir-m) $(lib-target)),) |
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builtin-target := $(obj)/built-in.o |
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endif |
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modorder-target := $(obj)/modules.order |
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# We keep a list of all modules in $(MODVERDIR) |
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__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ |
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$(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ |
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$(subdir-ym) $(always) |
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@: |
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# Linus' kernel sanity checking tool |
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ifneq ($(KBUILD_CHECKSRC),0) |
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ifeq ($(KBUILD_CHECKSRC),2) |
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quiet_cmd_force_checksrc = CHECK $< |
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cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
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else |
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quiet_cmd_checksrc = CHECK $< |
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cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; |
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endif |
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endif |
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# Do section mismatch analysis for each module/built-in.o |
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ifdef CONFIG_DEBUG_SECTION_MISMATCH |
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cmd_secanalysis = ; scripts/mod/modpost $@ |
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endif |
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# Compile C sources (.c) |
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# --------------------------------------------------------------------------- |
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# Default is built-in, unless we know otherwise |
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modkern_cflags = \ |
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$(if $(part-of-module), \ |
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$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ |
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$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) |
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quiet_modtag := $(empty) $(empty) |
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$(real-objs-m) : part-of-module := y |
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$(real-objs-m:.o=.i) : part-of-module := y |
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$(real-objs-m:.o=.s) : part-of-module := y |
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$(real-objs-m:.o=.lst): part-of-module := y |
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$(real-objs-m) : quiet_modtag := [M] |
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$(real-objs-m:.o=.i) : quiet_modtag := [M] |
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$(real-objs-m:.o=.s) : quiet_modtag := [M] |
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$(real-objs-m:.o=.lst): quiet_modtag := [M] |
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$(obj-m) : quiet_modtag := [M] |
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# Default for not multi-part modules |
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modname = $(basetarget) |
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$(multi-objs-m) : modname = $(modname-multi) |
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$(multi-objs-m:.o=.i) : modname = $(modname-multi) |
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$(multi-objs-m:.o=.s) : modname = $(modname-multi) |
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$(multi-objs-m:.o=.lst) : modname = $(modname-multi) |
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$(multi-objs-y) : modname = $(modname-multi) |
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$(multi-objs-y:.o=.i) : modname = $(modname-multi) |
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$(multi-objs-y:.o=.s) : modname = $(modname-multi) |
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$(multi-objs-y:.o=.lst) : modname = $(modname-multi) |
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quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ |
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cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< |
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$(obj)/%.s: $(src)/%.c FORCE |
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$(call if_changed_dep,cc_s_c) |
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quiet_cmd_cc_i_c = CPP $(quiet_modtag) $@ |
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cmd_cc_i_c = $(CPP) $(c_flags) -o $@ $< |
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$(obj)/%.i: $(src)/%.c FORCE |
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$(call if_changed_dep,cc_i_c) |
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cmd_gensymtypes = \ |
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$(CPP) -D__GENKSYMS__ $(c_flags) $< | \ |
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$(GENKSYMS) $(if $(1), -T $(2)) \ |
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$(patsubst y,-s _,$(CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX)) \ |
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$(if $(KBUILD_PRESERVE),-p) \ |
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-r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) |
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quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ |
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cmd_cc_symtypes_c = \ |
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set -e; \ |
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$(call cmd_gensymtypes,true,$@) >/dev/null; \ |
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test -s $@ || rm -f $@ |
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$(obj)/%.symtypes : $(src)/%.c FORCE |
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$(call cmd,cc_symtypes_c) |
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# C (.c) files |
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# The C file is compiled and updated dependency information is generated. |
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# (See cmd_cc_o_c + relevant part of rule_cc_o_c) |
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quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ |
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ifndef CONFIG_MODVERSIONS |
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cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< |
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else |
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# When module versioning is enabled the following steps are executed: |
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# o compile a .tmp_<file>.o from <file>.c |
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# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does |
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# not export symbols, we just rename .tmp_<file>.o to <file>.o and |
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# are done. |
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# o otherwise, we calculate symbol versions using the good old |
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# genksyms on the preprocessed source and postprocess them in a way |
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# that they are usable as a linker script |
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# o generate <file>.o from .tmp_<file>.o using the linker to |
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# replace the unresolved symbols __crc_exported_symbol with |
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# the actual value of the checksum generated by genksyms |
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cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< |
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cmd_modversions = \ |
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if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ |
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$(call cmd_gensymtypes,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ |
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> $(@D)/.tmp_$(@F:.o=.ver); \ |
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\ |
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$(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ |
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-T $(@D)/.tmp_$(@F:.o=.ver); \ |
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rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ |
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else \ |
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mv -f $(@D)/.tmp_$(@F) $@; \ |
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fi; |
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endif |
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ifdef CONFIG_FTRACE_MCOUNT_RECORD |
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ifdef BUILD_C_RECORDMCOUNT |
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ifeq ("$(origin RECORDMCOUNT_WARN)", "command line") |
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RECORDMCOUNT_FLAGS = -w |
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endif |
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# Due to recursion, we must skip empty.o. |
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# The empty.o file is created in the make process in order to determine |
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# the target endianness and word size. It is made before all other C |
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# files, including recordmcount. |
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sub_cmd_record_mcount = \ |
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if [ $(@) != "scripts/mod/empty.o" ]; then \ |
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$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \ |
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fi; |
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recordmcount_source := $(srctree)/scripts/recordmcount.c \ |
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$(srctree)/scripts/recordmcount.h |
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else |
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sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \ |
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"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \ |
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"$(if $(CONFIG_64BIT),64,32)" \ |
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"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \ |
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"$(LD)" "$(NM)" "$(RM)" "$(MV)" \ |
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"$(if $(part-of-module),1,0)" "$(@)"; |
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recordmcount_source := $(srctree)/scripts/recordmcount.pl |
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endif |
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cmd_record_mcount = \ |
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if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \ |
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"$(CC_FLAGS_FTRACE)" ]; then \ |
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$(sub_cmd_record_mcount) \ |
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fi; |
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endif |
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define rule_cc_o_c |
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$(call echo-cmd,checksrc) $(cmd_checksrc) \ |
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$(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ |
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$(cmd_modversions) \ |
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$(call echo-cmd,record_mcount) \ |
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$(cmd_record_mcount) \ |
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scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ |
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$(dot-target).tmp; \ |
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rm -f $(depfile); \ |
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mv -f $(dot-target).tmp $(dot-target).cmd |
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endef |
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# Built-in and composite module parts |
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$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE |
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$(call cmd,force_checksrc) |
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$(call if_changed_rule,cc_o_c) |
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# Single-part modules are special since we need to mark them in $(MODVERDIR) |
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$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE |
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$(call cmd,force_checksrc) |
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$(call if_changed_rule,cc_o_c) |
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@{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod) |
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quiet_cmd_cc_lst_c = MKLST $@ |
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cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \ |
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$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \ |
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System.map $(OBJDUMP) > $@ |
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$(obj)/%.lst: $(src)/%.c FORCE |
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$(call if_changed_dep,cc_lst_c) |
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# Compile assembler sources (.S) |
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# --------------------------------------------------------------------------- |
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modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) |
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$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
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$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) |
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quiet_cmd_as_s_S = CPP $(quiet_modtag) $@ |
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cmd_as_s_S = $(CPP) $(a_flags) -o $@ $< |
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$(obj)/%.s: $(src)/%.S FORCE |
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$(call if_changed_dep,as_s_S) |
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quiet_cmd_as_o_S = AS $(quiet_modtag) $@ |
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cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< |
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$(obj)/%.o: $(src)/%.S FORCE |
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$(call if_changed_dep,as_o_S) |
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targets += $(real-objs-y) $(real-objs-m) $(lib-y) |
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targets += $(extra-y) $(MAKECMDGOALS) $(always) |
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# Linker scripts preprocessor (.lds.S -> .lds) |
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# --------------------------------------------------------------------------- |
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quiet_cmd_cpp_lds_S = LDS $@ |
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cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \ |
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-D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $< |
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$(obj)/%.lds: $(src)/%.lds.S FORCE |
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$(call if_changed_dep,cpp_lds_S) |
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# ASN.1 grammar |
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# --------------------------------------------------------------------------- |
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quiet_cmd_asn1_compiler = ASN.1 $@ |
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cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ |
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$(subst .h,.c,$@) $(subst .c,.h,$@) |
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.PRECIOUS: $(objtree)/$(obj)/%-asn1.c $(objtree)/$(obj)/%-asn1.h |
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$(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler |
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$(call cmd,asn1_compiler) |
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# Build the compiled-in targets |
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# --------------------------------------------------------------------------- |
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# To build objects in subdirs, we need to descend into the directories |
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$(sort $(subdir-obj-y)): $(subdir-ym) ; |
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# |
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# Rule to compile a set of .o files into one .o file |
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# |
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ifdef builtin-target |
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quiet_cmd_link_o_target = LD $@ |
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# If the list of objects to link is empty, just create an empty built-in.o |
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cmd_link_o_target = $(if $(strip $(obj-y)),\ |
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$(LD) $(ld_flags) -r -o $@ $(filter $(obj-y), $^) \ |
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$(cmd_secanalysis),\ |
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rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@) |
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$(builtin-target): $(obj-y) FORCE |
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$(call if_changed,link_o_target) |
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targets += $(builtin-target) |
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endif # builtin-target |
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# |
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# Rule to create modules.order file |
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# |
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# Create commands to either record .ko file or cat modules.order from |
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# a subdirectory |
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modorder-cmds = \ |
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$(foreach m, $(modorder), \ |
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$(if $(filter %/modules.order, $m), \ |
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cat $m;, echo kernel/$m;)) |
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$(modorder-target): $(subdir-ym) FORCE |
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$(Q)(cat /dev/null; $(modorder-cmds)) > $@ |
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# |
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# Rule to compile a set of .o files into one .a file |
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# |
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ifdef lib-target |
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quiet_cmd_link_l_target = AR $@ |
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cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) |
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$(lib-target): $(lib-y) FORCE |
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$(call if_changed,link_l_target) |
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targets += $(lib-target) |
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endif |
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# |
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# Rule to link composite objects |
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# |
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# Composite objects are specified in kbuild makefile as follows: |
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# <composite-object>-objs := <list of .o files> |
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# or |
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# <composite-object>-y := <list of .o files> |
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link_multi_deps = \ |
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$(filter $(addprefix $(obj)/, \ |
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$($(subst $(obj)/,,$(@:.o=-objs))) \ |
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$($(subst $(obj)/,,$(@:.o=-y)))), $^) |
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quiet_cmd_link_multi-y = LD $@ |
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cmd_link_multi-y = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) |
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quiet_cmd_link_multi-m = LD [M] $@ |
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cmd_link_multi-m = $(cmd_link_multi-y) |
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$(multi-used-y): FORCE |
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$(call if_changed,link_multi-y) |
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$(call multi_depend, $(multi-used-y), .o, -objs -y) |
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$(multi-used-m): FORCE |
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$(call if_changed,link_multi-m) |
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@{ echo $(@:.o=.ko); echo $(link_multi_deps); } > $(MODVERDIR)/$(@F:.o=.mod) |
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$(call multi_depend, $(multi-used-m), .o, -objs -y) |
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targets += $(multi-used-y) $(multi-used-m) |
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# Add intermediate targets: |
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# When building objects with specific suffix patterns, add intermediate |
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# targets that the final targets are derived from. |
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intermediate_targets = $(foreach sfx, $(2), \ |
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$(patsubst %$(strip $(1)),%$(sfx), \ |
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$(filter %$(strip $(1)), $(targets)))) |
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# %.lex.o <- %.lex.c <- %.l |
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# %.tab.o <- %.tab.[ch] <- %.y |
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targets += $(call intermediate_targets, .lex.o, .lex.c) \ |
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$(call intermediate_targets, .tab.o, .tab.c .tab.h) |
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# Descending |
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# --------------------------------------------------------------------------- |
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PHONY += $(subdir-ym) |
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$(subdir-ym): |
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$(Q)$(MAKE) $(build)=$@ |
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# Add FORCE to the prequisites of a target to force it to be always rebuilt. |
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# --------------------------------------------------------------------------- |
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PHONY += FORCE |
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FORCE: |
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# Read all saved command lines and dependencies for the $(targets) we |
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# may be building above, using $(if_changed{,_dep}). As an |
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# optimization, we don't need to read them if the target does not |
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# exist, we will rebuild anyway in that case. |
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targets := $(wildcard $(sort $(targets))) |
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cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) |
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ifneq ($(cmd_files),) |
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include $(cmd_files) |
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endif |
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# Declare the contents of the .PHONY variable as phony. We keep that |
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# information in a variable se we can use it in if_changed and friends. |
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.PHONY: $(PHONY)
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