1# Input 2# 3# subdirs tells the subdirectories to descend 4# 5# Output 6# 7# set srcs 8# set cflags-$(oname) cflags-remove-$(oname) 9# aflags-$(oname) aflags-remove-$(oname) 10# cppflags-$(oname) cppflags-remove-$(oname) 11# incdirs-$(oname) 12# incdirs-lib$(libname) [if libname is defined] 13# cppflags-lib$(libname) [if libname is defined] 14# cflags-lib$(libname) [if libname is defined] 15# for each file found, oname is the name of the object file for corresponding 16# source file 17 18srcs := 19 20define process-subdir-srcs-y 21ifeq ($$(sub-dir),.) 22srcs += $1 23oname := $(out-dir)/$(base-prefix)$(basename $1).o 24else 25ifneq ($(filter /%,$(1)),) 26# $1 is an absolute path - start with "/" 27srcs += $1 28oname := $(out-dir)/$(base-prefix)$(basename $1).o 29else 30srcs += $(sub-dir)/$1 31oname := $(out-dir)/$(base-prefix)$(basename $$(sub-dir)/$1).o 32endif 33endif 34cflags-$$(oname) := $$(cflags-y) $$(cflags-$(1)-y) 35cflags-remove-$$(oname) := $$(cflags-remove-y) \ 36 $$(cflags-remove-$(1)-y) 37cppflags-$$(oname) := $$(cppflags-y) $$(cppflags-$(1)-y) 38cppflags-remove-$$(oname) := $$(cppflags-remove-y) \ 39 $$(cppflags-remove-$(1)-y) 40aflags-$$(oname) := $$(aflags-y) $$(aflags-$(1)-y) 41aflags-remove-$$(oname) := $$(aflags-remove-y) \ 42 $$(aflags-remove-$(1)-y) 43incdirs-$$(oname) := $$(thissubdir-incdirs) $$(addprefix $(sub-dir)/,$$(incdirs-$(1)-y)) 44# Clear local filename specific variables to avoid accidental reuse 45# in another subdirectory 46cflags-$(1)-y := 47cflags-remove-$(1)-y := 48cflags-lib-y := 49cppflags-$(1)-y := 50cppflags-remove-$(1)-y := 51cppflags-lib-y := 52aflags-$(1)-y := 53aflags-remove-$(1)-y := 54incdirs-$(1)-y := 55fname := 56oname := 57endef #process-subdir-srcs-y 58 59define process-subdir 60sub-dir := $1 61include $1/sub.mk 62sub-subdirs := $$(addprefix $1/,$$(subdirs-y)) 63incdirs$(sm) := $(incdirs$(sm)) $$(addprefix $1/,$$(global-incdirs-y)) 64thissubdir-incdirs := $$(addprefix $1/,$$(incdirs-y)) 65ifneq ($$(libname),) 66incdirs-lib$$(libname) := $$(incdirs-lib$$(libname)) $$(addprefix $1/,$$(incdirs-lib-y)) 67cflags-lib$$(libname) := $$(cflags-lib$$(libname)) $$(cflags-lib-y) 68cppflags-lib$$(libname) := $$(cppflags-lib$$(libname)) $$(cppflags-lib-y) 69endif 70 71# Process files in current directory 72$$(foreach s, $$(srcs-y), $$(eval $$(call process-subdir-srcs-y,$$(s)))) 73# Clear flags used when processing current directory 74srcs-y := 75cflags-y := 76cflags-lib-y := 77cppflags-y := 78cppflags-lib-y := 79aflags-y := 80cflags-remove-y := 81subdirs-y := 82global-incdirs-y := 83incdirs-lib-y := 84incdirs-y := 85 86# Process subdirectories in current directory 87$$(foreach sd, $$(sub-subdirs), $$(eval $$(call process-subdir,$$(sd)))) 88endef #process-subdir 89 90# Top subdirectories 91$(foreach sd, $(subdirs), $(eval $(call process-subdir,$(sd)))) 92