bf030467d2
Ilias Apalodimas <ilias.apalodimas@linaro.org> says: Last time the kbuild scripts were synced with the Linux kernel was on the 4.20 release. Updating directly to 6.x makes the diff difficult to read, so let's do the changes incrementally and bump to 5.1 first. Since the number of commits is big, I am splitting this in multiple series. This one includes most of the commits for Makefile.build, Makefile.lib and some from Makefile. commit eeb5687a7139649e ("kbuild: add -Werror=strict-prototypes flag unconditionally") commit 3812b8c5c5d5 ("kbuild: make -r/-R effective in top Makefile for old Make versions") commit b421b8a6cb87 ("kbuild: remove unused archmrproper") commit 1a49b2fd8f58 ("kbuild: strip whitespace in cmd_record_mcount findstring") commit 88110713ca9dfb ("kbuild: hardcode genksyms path and remove GENKSYMS variable") commit 1d8001ef358 ("kbuild: generate modules.order only when CONFIG_MODULES=y") commit 45c4372d00 ("kbuild: refactor quiet_modtag") commit b39a691617e4 commit ("kbuild: remove redundant quiet_modtag for $(obj-m)") commit 5439f09f488f ("kbuild: remove redundant 'set -e' from cmd_* defines") commit e5d289100d3a ("kbuild: remove trailing semicolon from cmd_* passed to if_changed_rule") commit 3a2429e1faf4 ("kbuild: change if_changed_rule for multi-line recipe") commit ee3e46b7efd2 ("kbuild: refactor modversions build rules") commit 4317ee3b6a5e ("kbuild: remove redundant 'set -e' from sub_cmd_record_mcount") commit 392885ee82d3 ("kbuild: let fixdep directly write to .*.cmd files") commit 898f5a009f22 ("kbuild: move archive command to scripts/Makefile.lib") commit b79c6aa6a1f1 ("kbuild: remove unnecessary in-subshell execution") commit afa974b77128 ("kbuild: add real-prereqs shorthand for $(filter-out FORCE,$^)") commit ecbd10d90e94 ("kbuild: simplify rules of data compression with size appending") commit 58156ba4468f ("kbuild: skip 'addtree' and 'flags' magic for external module build") commit 172caf1993b7 ("kbuild: remove redundant target cleaning on failure") commit f3fd4a3f3a38 ("kbuild: remove redundant 'set -e' from filechk_offsets") commit a2237fec1e06 ("kbuild: Enable dtc graph_port warning by default") commit 70523a3ce5ff ("kbuild: disable dtc simple_bus_reg warnings by default") commit e4aca4595005 ("kbuild: de-duplicate fixdep usage") Link: https://lore.kernel.org/r/20250520052153.307194-1-ilias.apalodimas@linaro.org
416 lines
13 KiB
Makefile
416 lines
13 KiB
Makefile
# 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 := vpl
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src := $(patsubst $(prefix)/%,%,$(obj))
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ifeq ($(obj),$(src))
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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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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/Kbuild.include
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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 += $(PLATFORM_CPPFLAGS)
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include scripts/Makefile.lib
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# Do not include host rules unless needed
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ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),)
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include scripts/Makefile.host
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endif
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ifndef obj
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$(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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ifdef CONFIG_MODULES
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modorder-target := $(obj)/modules.order
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endif
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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) $(always)
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@:
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# Linus' kernel sanity checking tool
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ifeq ($(KBUILD_CHECKSRC),1)
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quiet_cmd_checksrc = CHECK $<
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cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
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else ifeq ($(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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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 = $(if $(part-of-module),[M], )
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$(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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# 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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scripts/genksyms/genksyms $(if $(1), -T $(2)) \
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$(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) $@
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cmd_cc_symtypes_c = \
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$(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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cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
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ifdef CONFIG_MODVERSIONS
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# When module versioning is enabled the following steps are executed:
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# o compile a <file>.o from <file>.c
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# o if <file>.o doesn't contain a __ksymtab version, i.e. does
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# not export symbols, it's 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 .tmp_<file>.o from <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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# o remove .tmp_<file>.o to <file>.o
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cmd_modversions = \
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if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \
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$(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) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \
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-T $(@D)/.tmp_$(@F:.o=.ver); \
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mv -f $(@D)/.tmp_$(@F) $@; \
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rm -f $(@D)/.tmp_$(@F:.o=.ver); \
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fi;
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endif
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ifdef CONFIG_FTRACE_MCOUNT_RECORD
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# gcc 5 supports generating the mcount tables directly
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ifneq ($(call cc-option,-mrecord-mcount,y),y)
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KBUILD_CFLAGS += -mrecord-mcount
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else
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# else do it all manually
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ifdef BUILD_C_RECORDMCOUNT
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ifeq ("$(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 = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
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"$(if $(CONFIG_SYS_BIG_ENDIAN),big,little)" \
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"$(if $(CONFIG_64BIT),64,32)" \
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"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
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"$(LD) $(KBUILD_LDFLAGS)" "$(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 = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \
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$(sub_cmd_record_mcount))
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endif # -record-mcount
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endif
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define rule_cc_o_c
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$(call cmd,checksrc)
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$(call cmd_and_fixdep,cc_o_c)
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$(call cmd,gen_ksymdeps)
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$(call cmd,checkdoc)
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$(call cmd,objtool)
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$(call cmd,modversions_c)
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$(call cmd,record_mcount)
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endef
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define rule_as_o_S
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$(call cmd_and_fixdep,as_o_S)
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$(call cmd,gen_ksymdeps)
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$(call cmd,objtool)
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$(call cmd,modversions_S)
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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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targets += $(real-dtb-y) $(lib-y) $(always-y)
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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)/tools/asn1_compiler $< \
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$(subst .h,.c,$@) $(subst .c,.h,$@)
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$(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/tools/asn1_compiler
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$(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 = AR $@
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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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rm -f $@; $(AR) cDPrsT $@ $(filter $(obj-y), $^), \
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rm -f $@; $(AR) cDPrsT$(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)) > $@
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#
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# Rule to compile a set of .o files into one .a file
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#
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ifdef lib-target
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$(lib-target): $(lib-y) FORCE
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$(call if_changed,ar)
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targets += $(lib-target)
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endif
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quiet_cmd_link_multi-y = AR $@
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cmd_link_multi-y = rm -f $@; $(AR) cDPrsT$(KBUILD_ARFLAGS) $@ $(filter %.o,$^)
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quiet_cmd_link_multi-m = AR [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 $(filter %.o,$^); } > $(MODVERDIR)/$(@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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existing-targets := $(wildcard $(sort $(targets)))
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-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
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# Create directories for object files if they do not exist
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obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
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# If targets exist, their directories apparently exist. Skip mkdir.
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existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets))))
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obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs)))
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ifneq ($(obj-dirs),)
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$(shell mkdir -p $(obj-dirs))
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endif
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.PHONY: $(PHONY)
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