# Input
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#
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# subdirs tells the subdirectories to descend
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#
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# Output
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#
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# set srcs
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# set cflags-$(oname) cflags-remove-$(oname)
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# aflags-$(oname) aflags-remove-$(oname)
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# cppflags-$(oname) cppflags-remove-$(oname)
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# incdirs-$(oname)
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# incdirs-lib$(libname) [if libname is defined]
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# cppflags-lib$(libname) [if libname is defined]
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# cflags-lib$(libname) [if libname is defined]
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# for each file found, oname is the name of the object file for corresponding
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# source file
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srcs :=
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define process-subdir-srcs-y
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ifeq ($$(sub-dir),.)
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srcs += $1
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oname := $(out-dir)/$(base-prefix)$(basename $1).o
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else
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ifneq ($(filter /%,$(1)),)
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# $1 is an absolute path - start with "/"
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srcs += $1
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oname := $(out-dir)/$(base-prefix)$(basename $1).o
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else
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srcs += $(sub-dir)/$1
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oname := $(out-dir)/$(base-prefix)$(basename $$(sub-dir)/$1).o
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endif
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endif
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cflags-$$(oname) := $$(cflags-y) $$(cflags-$(1)-y)
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cflags-remove-$$(oname) := $$(cflags-remove-y) \
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$$(cflags-remove-$(1)-y)
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cppflags-$$(oname) := $$(cppflags-y) $$(cppflags-$(1)-y)
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cppflags-remove-$$(oname) := $$(cppflags-remove-y) \
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$$(cppflags-remove-$(1)-y)
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aflags-$$(oname) := $$(aflags-y) $$(aflags-$(1)-y)
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aflags-remove-$$(oname) := $$(aflags-remove-y) \
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$$(aflags-remove-$(1)-y)
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cxxflags-$$(oname) := $$(cxxflags-y) $$(cxxflags-$(1)-y)
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cxxflags-remove-$$(oname) := $$(cxxflags-remove-y) \
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$$(cxxflags-remove-$(1)-y)
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incdirs-$$(oname) := $$(thissubdir-incdirs) $$(addprefix $(sub-dir)/,$$(incdirs-$(1)-y))
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# Clear local filename specific variables to avoid accidental reuse
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# in another subdirectory
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cflags-$(1)-y :=
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cflags-remove-$(1)-y :=
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cflags-lib-y :=
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cppflags-$(1)-y :=
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cppflags-remove-$(1)-y :=
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cppflags-lib-y :=
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aflags-$(1)-y :=
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aflags-remove-$(1)-y :=
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incdirs-$(1)-y :=
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fname :=
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oname :=
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endef #process-subdir-srcs-y
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define process-subdir
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sub-dir := $1
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include $1/sub.mk
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sub-subdirs := $$(addprefix $1/,$$(subdirs-y))
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incdirs$(sm) := $(incdirs$(sm)) $$(addprefix $1/,$$(global-incdirs-y))
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thissubdir-incdirs := $$(addprefix $1/,$$(incdirs-y))
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ifneq ($$(libname),)
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incdirs-lib$$(libname) := $$(incdirs-lib$$(libname)) $$(addprefix $1/,$$(incdirs-lib-y))
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cflags-lib$$(libname) := $$(cflags-lib$$(libname)) $$(cflags-lib-y)
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cppflags-lib$$(libname) := $$(cppflags-lib$$(libname)) $$(cppflags-lib-y)
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endif
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# Process files in current directory
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$$(foreach s, $$(srcs-y), $$(eval $$(call process-subdir-srcs-y,$$(s))))
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# Clear flags used when processing current directory
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srcs-y :=
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cflags-y :=
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cflags-lib-y :=
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cppflags-y :=
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cppflags-lib-y :=
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aflags-y :=
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cflags-remove-y :=
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subdirs-y :=
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global-incdirs-y :=
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incdirs-lib-y :=
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incdirs-y :=
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# Process subdirectories in current directory
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$$(foreach sd, $$(sub-subdirs), $$(eval $$(call process-subdir,$$(sd))))
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endef #process-subdir
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# Top subdirectories
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$(foreach sd, $(subdirs), $(eval $(call process-subdir,$(sd))))
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