forked from rrcarlosr/Jetpack
491 lines
18 KiB
Plaintext
491 lines
18 KiB
Plaintext
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####
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# kbuild: Generic definitions
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# Convenient variables
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comma := ,
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quote := "
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squote := '
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double_dot := ..
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empty :=
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space := $(empty) $(empty)
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space_escape := _-_SPACE_-_
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pound := \#
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###
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# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
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dot-target = $(dir $@).$(notdir $@)
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###
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# The temporary file to save gcc -MD generated dependencies must not
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# contain a comma
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depfile = $(subst $(comma),_,$(dot-target).d)
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###
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# The conversion of .. to the _ddot_ to avoid any relative path to be
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# outside of out folder.
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replace_ddot = $(subst $(double_dot),_ddot_,$(1))
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###
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# filename of target with directory and extension stripped
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basetarget = $(basename $(notdir $@))
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###
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# filename of first prerequisite with directory and extension stripped
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baseprereq = $(basename $(notdir $<))
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###
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# Escape single quote for use in echo statements
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escsq = $(subst $(squote),'\$(squote)',$1)
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###
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# Easy method for doing a status message
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kecho := :
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quiet_kecho := echo
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silent_kecho := :
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kecho := $($(quiet)kecho)
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###
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# filechk is used to check if the content of a generated file is updated.
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# Sample usage:
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# define filechk_sample
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# echo $KERNELRELEASE
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# endef
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# version.h : Makefile
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# $(call filechk,sample)
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# The rule defined shall write to stdout the content of the new file.
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# The existing file will be compared with the new one.
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# - If no file exist it is created
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# - If the content differ the new file is used
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# - If they are equal no change, and no timestamp update
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# - stdin is piped in from the first prerequisite ($<) so one has
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# to specify a valid file as first prerequisite (often the kbuild file)
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define filechk
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$(Q)set -e; \
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$(kecho) ' CHK $@'; \
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mkdir -p $(dir $@); \
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$(filechk_$(1)) < $< > $@.tmp; \
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if [ -r $@ ] && cmp -s $@ $@.tmp; then \
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rm -f $@.tmp; \
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else \
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$(kecho) ' UPD $@'; \
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mv -f $@.tmp $@; \
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fi
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endef
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######
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# gcc support functions
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# See documentation in Documentation/kbuild/makefiles.txt
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# cc-cross-prefix
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# Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
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# Return first prefix where a prefix$(CC) is found in PATH.
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# If no $(CC) found in PATH with listed prefixes return nothing
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cc-cross-prefix = \
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$(word 1, $(foreach c,$(1), \
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$(shell set -e; \
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if (which $(strip $(c))$(CC)) > /dev/null 2>&1 ; then \
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echo $(c); \
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fi)))
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# output directory for tests below
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TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
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# try-run
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# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
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# Exit code chooses option. "$$TMP" is can be used as temporary file and
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# is automatically cleaned up.
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try-run = $(shell set -e; \
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TMP="$(TMPOUT).$$$$.tmp"; \
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TMPO="$(TMPOUT).$$$$.o"; \
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if ($(1)) >/dev/null 2>&1; \
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then echo "$(2)"; \
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else echo "$(3)"; \
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fi; \
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rm -f "$$TMP" "$$TMPO")
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# as-option
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# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
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as-option = $(call try-run,\
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$(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2))
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# as-instr
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# Usage: cflags-y += $(call as-instr,instr,option1,option2)
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as-instr = $(call try-run,\
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printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
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# __cc-option
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# Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586)
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__cc-option = $(call try-run,\
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$(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4))
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# Do not attempt to build with gcc plugins during cc-option tests.
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# (And this uses delayed resolution so the flags will be up to date.)
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CC_OPTION_CFLAGS = $(filter-out $(GCC_PLUGINS_CFLAGS),$(KBUILD_CFLAGS))
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# cc-option
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# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
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cc-option = $(call __cc-option, $(CC),\
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$(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS),$(1),$(2))
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# hostcc-option
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# Usage: cflags-y += $(call hostcc-option,-march=winchip-c6,-march=i586)
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hostcc-option = $(call __cc-option, $(HOSTCC),\
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$(HOSTCFLAGS) $(HOST_EXTRACFLAGS),$(1),$(2))
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# cc-option-yn
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# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
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cc-option-yn = $(call try-run,\
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$(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
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# cc-option-align
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# Prefix align with either -falign or -malign
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cc-option-align = $(subst -functions=0,,\
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$(call cc-option,-falign-functions=0,-malign-functions=0))
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# cc-disable-warning
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# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
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cc-disable-warning = $(call try-run,\
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$(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
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# cc-name
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# Expands to either gcc or clang
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cc-name = $(shell $(CC) -v 2>&1 | grep -q "clang version" && echo clang || echo gcc)
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# __cc-version
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# Returns compiler version
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__cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/$(cc-name)-version.sh $(CC))
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# __cc-fullversion
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# Returns full compiler version
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__cc-fullversion = $(shell $(CONFIG_SHELL) \
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$(srctree)/scripts/$(cc-name)-version.sh -p $(CC))
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# __cc-ifversion
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# Matches compiler name and version
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# Usage: EXTRA_CFLAGS += $(call cc-if-name-version, gcc, -lt, 0402, -O1)
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__cc-ifversion = $(shell [ $(cc-name) = $(1) ] && [ $(__cc-version) $(2) $(3) ] && echo $(4) || echo $(5))
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# __cc-if-fullversion
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# Matches compiler name and full version
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# Usage: EXTRA_CFLAGS += $(call cc-if-name-fullversion, gcc, -lt, 040502, -O1)
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__cc-if-fullversion = $(shell [ $(cc-name) = $(1) ] && [ $(__cc-fullversion) $(2) $(3) ] && echo $(4) || echo $(5))
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# gcc-ifversion
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gcc-ifversion = $(call __cc-ifversion, gcc, $(1), $(2), $(3), $(4))
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# gcc-if-fullversion
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gcc-if-fullversion = (call __cc-if-fullversion, gcc, $(1), $(2), $(3), $(4))
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# clang-ifversion
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clang-ifversion = $(call __cc-ifversion, clang, $(1), $(2), $(3), $(4))
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# clang-if-fullversion
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clang-if-fullversion = (call __cc-if-fullversion, clang, $(1), $(2), $(3), $(4))
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# cc-version
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cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))
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# cc-fullversion
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cc-fullversion = $(shell $(CONFIG_SHELL) \
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$(srctree)/scripts/gcc-version.sh -p $(CC))
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# backward compatibility
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cc-ifversion = $(gcc-ifversion)
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cc-if-fullversion = $(gcc-if-fullversion)
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# cc-ldoption
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# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
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cc-ldoption = $(call try-run,\
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$(CC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2))
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# ld-option
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# Usage: LDFLAGS += $(call ld-option, -X)
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ld-option = $(call try-run,\
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$(CC) -x c /dev/null -c -o "$$TMPO" ; $(LD) $(1) "$$TMPO" -o "$$TMP",$(1),$(2))
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# ar-option
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# Usage: KBUILD_ARFLAGS := $(call ar-option,D)
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# Important: no spaces around options
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ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2))
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# ld-name
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# Expands to either bfd or gold
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ld-name = $(shell $(LD) -v 2>&1 | grep -q "GNU gold" && echo gold || echo bfd)
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# ld-version
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# Note this is mainly for HJ Lu's 3 number binutil versions
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ld-version = $(shell $(LD) --version | $(srctree)/scripts/ld-version.sh)
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# ld-ifversion
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# Usage: $(call ld-ifversion, -ge, 22252, y)
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ld-ifversion = $(shell [ $(ld-version) $(1) $(2) ] && echo $(3) || echo $(4))
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# __ld-ifversion
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# Usage: $(call __ld-ifversion, gold, -ge, 112000000, y)
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__ld-ifversion = $(shell [ $(ld-name) = $(1) ] && [ $(ld-version) $(2) $(3) ] && echo $(4) || echo $(5))
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# bfd-ifversion
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# Usage: $(call bfd-ifversion, -ge, 227000000, y)
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bfd-ifversion = $(call __ld-ifversion, bfd, $(1), $(2), $(3), $(4))
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# gold-ifversion
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# Usage: $(call gold-ifversion, -ge, 112000000, y)
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gold-ifversion = $(call __ld-ifversion, gold, $(1), $(2), $(3), $(4))
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######
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###
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
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# Usage:
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# $(Q)$(MAKE) $(build)=dir
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build := -f $(srctree)/scripts/Makefile.build obj
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###
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj=
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# Usage:
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# $(Q)$(MAKE) $(modbuiltin)=dir
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modbuiltin := -f $(srctree)/scripts/Makefile.modbuiltin obj
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###
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.dtbinst obj=
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# Usage:
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# $(Q)$(MAKE) $(dtbinst)=dir
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dtbinst := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.dtbinst obj
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###
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
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# Usage:
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# $(Q)$(MAKE) $(clean)=dir
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clean := -f $(srctree)/scripts/Makefile.clean obj
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###
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# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.headersinst obj=
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# Usage:
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# $(Q)$(MAKE) $(hdr-inst)=dir
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hdr-inst := -f $(srctree)/scripts/Makefile.headersinst obj
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# Prefix -I with $(srctree) if it is not an absolute path.
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# skip if -I has no parameter
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addtree = $(if $(patsubst -I%,%,$(1)), \
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$(if $(filter-out -I/% -I./% -I../%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1)),$(1)))
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# Find all -I options and call addtree
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flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o)))
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# echo command.
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# Short version is used, if $(quiet) equals `quiet_', otherwise full one.
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echo-cmd = $(if $($(quiet)cmd_$(1)),\
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echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
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# printing commands
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cmd = @$(echo-cmd) $(cmd_$(1))
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# Add $(obj)/ for paths that are not absolute
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objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
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###
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# if_changed - execute command if any prerequisite is newer than
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# target, or command line has changed
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# if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
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# including used config symbols
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# if_changed_rule - as if_changed but execute rule instead
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# See Documentation/kbuild/makefiles.txt for more info
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ifneq ($(KBUILD_NOCMDDEP),1)
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# Check if both arguments are the same including their order. Result is empty
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# string if equal. User may override this check using make KBUILD_NOCMDDEP=1
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arg-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(cmd_$@))), \
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$(subst $(space),$(space_escape),$(strip $(cmd_$1))))
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else
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arg-check = $(if $(strip $(cmd_$@)),,1)
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endif
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# Replace >$< with >$$< to preserve $ when reloading the .cmd file
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# (needed for make)
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# Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file
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# (needed for make)
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# Replace >'< with >'\''< to be able to enclose the whole string in '...'
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# (needed for the shell)
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make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
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# Find any prerequisites that is newer than target or that does not exist.
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# PHONY targets skipped in both cases.
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any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
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# Execute command if command has changed or prerequisite(s) are updated.
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#
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if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
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@set -e; \
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$(echo-cmd) $(cmd_$(1)); \
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printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
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# Execute the command and also postprocess generated .d dependencies file.
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if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \
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@set -e; \
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$(cmd_and_fixdep), @:)
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ifndef CONFIG_TRIM_UNUSED_KSYMS
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cmd_and_fixdep = \
|
||
|
|
$(echo-cmd) $(cmd_$(1)); \
|
||
|
|
scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
|
||
|
|
rm -f $(depfile); \
|
||
|
|
mv -f $(dot-target).tmp $(dot-target).cmd;
|
||
|
|
|
||
|
|
else
|
||
|
|
|
||
|
|
# Filter out exported kernel symbol names from the preprocessor output.
|
||
|
|
# See also __KSYM_DEPS__ in include/linux/export.h.
|
||
|
|
# We disable the depfile generation here, so as not to overwrite the existing
|
||
|
|
# depfile while fixdep is parsing it.
|
||
|
|
flags_nodeps = $(filter-out -Wp$(comma)-M%, $($(1)))
|
||
|
|
ksym_dep_filter = \
|
||
|
|
case "$(1)" in \
|
||
|
|
cc_*_c|cpp_i_c) \
|
||
|
|
$(CPP) $(call flags_nodeps,c_flags) -D__KSYM_DEPS__ $< ;; \
|
||
|
|
as_*_S|cpp_s_S) \
|
||
|
|
$(CPP) $(call flags_nodeps,a_flags) -D__KSYM_DEPS__ $< ;; \
|
||
|
|
boot*|build*|*cpp_lds_S|dtc|host*|vdso*) : ;; \
|
||
|
|
*) echo "Don't know how to preprocess $(1)" >&2; false ;; \
|
||
|
|
esac | tr ";" "\n" | sed -rn 's/^.*=== __KSYM_(.*) ===.*$$/KSYM_\1/p'
|
||
|
|
|
||
|
|
cmd_and_fixdep = \
|
||
|
|
$(echo-cmd) $(cmd_$(1)); \
|
||
|
|
$(ksym_dep_filter) | \
|
||
|
|
scripts/basic/fixdep -e $(depfile) $@ '$(make-cmd)' \
|
||
|
|
> $(dot-target).tmp; \
|
||
|
|
rm -f $(depfile); \
|
||
|
|
mv -f $(dot-target).tmp $(dot-target).cmd;
|
||
|
|
|
||
|
|
endif
|
||
|
|
|
||
|
|
# Usage: $(call if_changed_rule,foo)
|
||
|
|
# Will check if $(cmd_foo) or any of the prerequisites changed,
|
||
|
|
# and if so will execute $(rule_foo).
|
||
|
|
if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \
|
||
|
|
@set -e; \
|
||
|
|
$(rule_$(1)), @:)
|
||
|
|
|
||
|
|
###
|
||
|
|
# why - tell why a a target got build
|
||
|
|
# enabled by make V=2
|
||
|
|
# Output (listed in the order they are checked):
|
||
|
|
# (1) - due to target is PHONY
|
||
|
|
# (2) - due to target missing
|
||
|
|
# (3) - due to: file1.h file2.h
|
||
|
|
# (4) - due to command line change
|
||
|
|
# (5) - due to missing .cmd file
|
||
|
|
# (6) - due to target not in $(targets)
|
||
|
|
# (1) PHONY targets are always build
|
||
|
|
# (2) No target, so we better build it
|
||
|
|
# (3) Prerequisite is newer than target
|
||
|
|
# (4) The command line stored in the file named dir/.target.cmd
|
||
|
|
# differed from actual command line. This happens when compiler
|
||
|
|
# options changes
|
||
|
|
# (5) No dir/.target.cmd file (used to store command line)
|
||
|
|
# (6) No dir/.target.cmd file and target not listed in $(targets)
|
||
|
|
# This is a good hint that there is a bug in the kbuild file
|
||
|
|
ifeq ($(KBUILD_VERBOSE),2)
|
||
|
|
why = \
|
||
|
|
$(if $(filter $@, $(PHONY)),- due to target is PHONY, \
|
||
|
|
$(if $(wildcard $@), \
|
||
|
|
$(if $(strip $(any-prereq)),- due to: $(any-prereq), \
|
||
|
|
$(if $(arg-check), \
|
||
|
|
$(if $(cmd_$@),- due to command line change, \
|
||
|
|
$(if $(filter $@, $(targets)), \
|
||
|
|
- due to missing .cmd file, \
|
||
|
|
- due to $(notdir $@) not in $$(targets) \
|
||
|
|
) \
|
||
|
|
) \
|
||
|
|
) \
|
||
|
|
), \
|
||
|
|
- due to target missing \
|
||
|
|
) \
|
||
|
|
)
|
||
|
|
|
||
|
|
echo-why = $(call escsq, $(strip $(why)))
|
||
|
|
endif
|
||
|
|
|
||
|
|
###############################################################################
|
||
|
|
#
|
||
|
|
# When a Kconfig string contains a filename, it is suitable for
|
||
|
|
# passing to shell commands. It is surrounded by double-quotes, and
|
||
|
|
# any double-quotes or backslashes within it are escaped by
|
||
|
|
# backslashes.
|
||
|
|
#
|
||
|
|
# This is no use for dependencies or $(wildcard). We need to strip the
|
||
|
|
# surrounding quotes and the escaping from quotes and backslashes, and
|
||
|
|
# we *do* need to escape any spaces in the string. So, for example:
|
||
|
|
#
|
||
|
|
# Usage: $(eval $(call config_filename,FOO))
|
||
|
|
#
|
||
|
|
# Defines FOO_FILENAME based on the contents of the CONFIG_FOO option,
|
||
|
|
# transformed as described above to be suitable for use within the
|
||
|
|
# makefile.
|
||
|
|
#
|
||
|
|
# Also, if the filename is a relative filename and exists in the source
|
||
|
|
# tree but not the build tree, define FOO_SRCPREFIX as $(srctree)/ to
|
||
|
|
# be prefixed to *both* command invocation and dependencies.
|
||
|
|
#
|
||
|
|
# Note: We also print the filenames in the quiet_cmd_foo text, and
|
||
|
|
# perhaps ought to have a version specially escaped for that purpose.
|
||
|
|
# But it's only cosmetic, and $(patsubst "%",%,$(CONFIG_FOO)) is good
|
||
|
|
# enough. It'll strip the quotes in the common case where there's no
|
||
|
|
# space and it's a simple filename, and it'll retain the quotes when
|
||
|
|
# there's a space. There are some esoteric cases in which it'll print
|
||
|
|
# the wrong thing, but we don't really care. The actual dependencies
|
||
|
|
# and commands *do* get it right, with various combinations of single
|
||
|
|
# and double quotes, backslashes and spaces in the filenames.
|
||
|
|
#
|
||
|
|
###############################################################################
|
||
|
|
#
|
||
|
|
define config_filename
|
||
|
|
ifneq ($$(CONFIG_$(1)),"")
|
||
|
|
$(1)_FILENAME := $$(subst \\,\,$$(subst \$$(quote),$$(quote),$$(subst $$(space_escape),\$$(space),$$(patsubst "%",%,$$(subst $$(space),$$(space_escape),$$(CONFIG_$(1)))))))
|
||
|
|
ifneq ($$(patsubst /%,%,$$(firstword $$($(1)_FILENAME))),$$(firstword $$($(1)_FILENAME)))
|
||
|
|
else
|
||
|
|
ifeq ($$(wildcard $$($(1)_FILENAME)),)
|
||
|
|
ifneq ($$(wildcard $$(srctree)/$$($(1)_FILENAME)),)
|
||
|
|
$(1)_SRCPREFIX := $(srctree)/
|
||
|
|
endif
|
||
|
|
endif
|
||
|
|
endif
|
||
|
|
endif
|
||
|
|
endef
|
||
|
|
#
|
||
|
|
###############################################################################
|
||
|
|
|
||
|
|
# It's a common trick to declare makefile variable that contains space
|
||
|
|
# we'll need it to convert the path string to list (string delimited by spaces)
|
||
|
|
# and vice versa
|
||
|
|
the-space :=
|
||
|
|
the-space +=
|
||
|
|
# TEGRA_ROOT_PATH is the relative path to the directory one level upper than $srctree
|
||
|
|
_TEGRA_ROOT_PATH = $(subst ^$(realpath $(srctree)/..)/,,^$(realpath $(kbuild-dir)))
|
||
|
|
# _TEGRA_REL_PATH is path like "../../../" that points to directory one level
|
||
|
|
# upper that $(srctree)
|
||
|
|
_TEGRA_REL_PATH = $(subst $(the-space),/,$(patsubst %,..,$(subst /, ,$(_TEGRA_ROOT_PATH))))
|
||
|
|
# _KERNEL_LAST is the last directory name in $(srctree)
|
||
|
|
_KERNEL_LAST = $(lastword $(subst /, ,$(realpath $(srctree))))
|
||
|
|
# obj-y += $(call tegra-path,nv-hidden-repo,drivers/foo/bar.o)
|
||
|
|
# will evaluate to either:
|
||
|
|
# obj-y += ../../../nv-hidden-repo/drivers/foo/bar.o
|
||
|
|
# or:
|
||
|
|
# obj-y += bar.o
|
||
|
|
tegra-base-kernel-path = $(call _TEGRA_REL_PATH)/$(call _KERNEL_LAST)
|
||
|
|
tegra-path = $(if $(wildcard $(srctree)/../$(1)),$(call _TEGRA_REL_PATH)/$(1)/$(2),$(call tegra-base-kernel-path)/$(2))
|
||
|
|
|
||
|
|
ifneq ($(NV_BUILD_KERNEL_DTS_ROOT),)
|
||
|
|
tegra-dtstree = $(NV_BUILD_KERNEL_DTS_ROOT)
|
||
|
|
else
|
||
|
|
tegra-dtstree = $(srctree)/../../hardware/nvidia
|
||
|
|
endif
|
||
|
|
|
||
|
|
tegra-root-dtstree = $(subst ^$(realpath $(tegra-dtstree)/../..)/,,^$(realpath $(srctree)/arch/arm64/boot/dts))
|
||
|
|
tegra-rel-dtstree = $(subst $(the-space),/,$(patsubst %,..,$(subst /, ,$(tegra-root-dtstree))))
|
||
|
|
# delete partially updated (i.e. corrupted) files on error
|
||
|
|
.DELETE_ON_ERROR:
|