pinebuds/scripts/lib.mk

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2022-08-15 04:20:27 -05:00
cur_makefile := $(lastword $(MAKEFILE_LIST))
$(cur_makefile): ;
# Backward compatibility
asflags-y += $(EXTRA_AFLAGS)
ccflags-y += $(EXTRA_CFLAGS)
cppflags-y += $(EXTRA_CPPFLAGS)
ldflags-y += $(EXTRA_LDFLAGS)
#
# flags that take effect in sub directories
export KBUILD_SUBDIR_ASFLAGS := $(KBUILD_SUBDIR_ASFLAGS) $(subdir-asflags-y)
export KBUILD_SUBDIR_CCFLAGS := $(KBUILD_SUBDIR_CCFLAGS) $(subdir-ccflags-y)
# Figure out what we need to build from the various variables
# ===========================================================================
# Handle archives
# ---------------------------------------------------------------------------
# Extract archives from $(obj-y)
archive-y := $(filter %.a, $(obj-y))
archive-custom-valid := $(filter $(archive-custom), $(archive-y))
ifeq ($(archive-y),)
archive-src-y :=
archive-bin-y :=
else # archive-y
ifeq ($(FORCE_TO_USE_LIB),1)
archive-bin-y := $(archive-y)
else
# Filter out archive-custom-valid
archive-y := $(filter-out $(archive-custom-valid), $(archive-y))
# Extract archives that have source files available
archive-src-y := $(foreach m, $(archive-y), $(if $(wildcard $(addprefix $(srctree)/$(src)/,$($(m:.a=-y):.o=.*))), $(m)))
# Extract archives that do NOT have source files
archive-bin-y := $(filter-out $(archive-src-y), $(archive-y))
endif
# If the source files of the archive (including archive-custom-valid) exist, build the source files directly
obj-y := $(filter-out $(archive-src-y) $(archive-custom-valid), $(obj-y)) $(foreach m, $(archive-src-y) $(archive-custom-valid), $($(m:.a=-y)))
endif # archive-y
# Handle composite objects
# ---------------------------------------------------------------------------
# if $(foo-objs) exists, foo.o is a composite object
multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
# Build list of the parts of our composite objects, our composite
# objects depend on those (obviously)
multi-objs-y := $(foreach m, $(multi-used-y), $($(m:.o=-objs)) $($(m:.o=-y)))
multi-objs-subdir := $(patsubst %/,%,$(filter %/, $(multi-objs-y)))
multi-objs-archive := $(filter %.a, $(multi-objs-y))
multi-objs-y := $(patsubst %/, %/built-in$(built_in_suffix), $(multi-objs-y))
multi-objs := $(multi-objs-y)
define multi_subdir_built_in
$(foreach m, $(1), $(if $($(m:.o=$(strip $2))), $(eval $(m:.o=$(strip $2)) := $(patsubst %/, %/built-in$(built_in_suffix), $($(m:.o=$(strip $2)))))))
endef
ifneq ($(multi-objs-subdir),)
$(call multi_subdir_built_in,$(multi-used-y),-objs)
$(call multi_subdir_built_in,$(multi-used-y),-y)
endif
ifneq ($(multi-objs-archive),)
ifneq ($(filter $(archive-custom), $(multi-objs-archive)),)
$(error Composite objects cannot be built from customized archives)
endif
mobjs-archive-src-y :=
mobjs-archive-bin-y :=
mobjs-archive-y := $(multi-objs-archive)
ifeq ($(FORCE_TO_USE_LIB),1)
mobjs-archive-bin-y += $(mobjs-archive-y)
else
# Extract archives that have source files available
mobjs-archive-src-y += $(foreach m, $(mobjs-archive-y), $(if $(wildcard $(addprefix $(srctree)/$(src)/,$($(m:.a=-y):.o=.*))), $(m)))
# Extract archives that do NOT have source files
mobjs-archive-bin-y := $(filter-out $(mobjs-archive-src-y), $(mobjs-archive-y))
endif
# If the source files of the archive (including archive-custom-valid) exist, build the source files directly
mobjs-obj-y := $(foreach m, $(mobjs-archive-src-y), $($(m:.a=-y)))
archive-y += $(mobjs-archive-y)
archive-bin-y += $(mobjs-archive-bin-y)
archive-src-y += $(mobjs-archive-src-y)
obj-y += $(mobjs-obj-y)
endif
# Handle objects in subdirs
# ---------------------------------------------------------------------------
# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.o or .a
# and add the directory to the list of dirs to descend into: $(subdir-y)
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
subdir-y += $(__subdir-y)
obj-y := $(patsubst %/, %/built-in$(built_in_suffix), $(obj-y))
# Subdirectories we need to descend into
subdir-y := $(sort $(subdir-y) $(multi-objs-subdir))
# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to
# tell kbuild to descend
subdir-obj-y := $(filter %/built-in$(built_in_suffix), $(obj-y) $(multi-objs-y))
# $(obj-dirs) is a list of directories that contain object files
obj-dirs := $(dir $(multi-objs) $(obj-y))
# Replace multi-part objects by their individual parts, look at local dir only
real-objs-y := $(foreach m, $(filter-out $(subdir-obj-y), $(obj-y)), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) $(extra-y)
# Add subdir path
extra-y := $(addprefix $(obj)/,$(extra-y))
always := $(addprefix $(obj)/,$(always))
targets := $(addprefix $(obj)/,$(targets))
obj-y := $(addprefix $(obj)/,$(obj-y))
lib-y := $(addprefix $(obj)/,$(lib-y))
subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y))
real-objs-y := $(addprefix $(obj)/,$(real-objs-y))
multi-used-y := $(addprefix $(obj)/,$(multi-used-y))
multi-objs-y := $(addprefix $(obj)/,$(multi-objs-y))
subdir-y := $(addprefix $(obj)/,$(subdir-y))
obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
archive-y := $(addprefix $(obj)/,$(archive-y))
archive-src-y := $(addprefix $(obj)/,$(archive-src-y))
archive-bin-y := $(addprefix $(obj)/,$(archive-bin-y))
archive-custom-valid := $(addprefix $(obj)/,$(archive-custom-valid))
orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(KBUILD_SUBDIR_CCFLAGS) \
$(ccflags-y) $(CFLAGS_$(basetarget).o)
_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags) $(C_ONLY_FLAGS))
_c++_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags) $(C++_ONLY_FLAGS))
_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(KBUILD_SUBDIR_ASFLAGS) \
$(asflags-y) $(AFLAGS_$(basetarget).o)
_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F))
# If building the kernel in a separate objtree expand all occurrences
# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/').
ifeq ($(KBUILD_SRC),)
__c_flags = $(_c_flags)
__c++_flags = $(_c++_flags)
__a_flags = $(_a_flags)
__cpp_flags = $(_cpp_flags)
else
# -I$(obj) locates generated .h files
# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files
# and locates generated .h files
# FIXME: Replace both with specific CFLAGS* statements in the makefiles
__c_flags = $(call addtree,-I$(obj)) $(call flags,_c_flags)
__c++_flags = $(call addtree,-I$(obj)) $(call flags,_c++_flags)
__a_flags = $(call flags,_a_flags)
__cpp_flags = $(call flags,_cpp_flags)
endif
ifeq ($(WIN_PLAT),y)
# Not to include system header files in dependency files,
# for there are space characters in system path by default.
depfile_flags = -MMD -MP -MF $(depfile)
else
depfile_flags = -MD -MP -MF $(depfile)
endif
c_flags = $(depfile_flags) $(NOSTDINC_FLAGS) $(__c_flags)
c++_flags = $(depfile_flags) $(NOSTDINC_FLAGS) $(__c++_flags)
a_flags = $(depfile_flags) $(NOSTDINC_FLAGS) $(__a_flags)
a_cpp_flags = $(a_flags)
cpp_flags = $(depfile_flags) $(NOSTDINC_FLAGS) $(__cpp_flags)
ld_flags = $(LDFLAGS) $(ldflags-y)
# Useful for describing the dependency of composite objects
# Usage:
# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
define multi_depend
$(foreach m, $(notdir $1), \
$(eval $(obj)/$m: \
$(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
endef
# Commands useful for building a boot image
# ===========================================================================
#
# Use as following:
#
# target: source(s) FORCE
# $(if_changed,ld/objcopy/gzip)
#
# and add target to extra-y so that we know we have to
# read in the saved command line
# Linking
# ---------------------------------------------------------------------------
quiet_cmd_ld = LD $@
cmd_ld = $(LD) $(LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) \
$(filter-out FORCE,$^) -o $@
# Objcopy
# ---------------------------------------------------------------------------
quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@