1# Input 2# 3# subdirs tells the subdirectories to descend 4# 5# Output 6# 7# set srcs gen-srcs 8# set cflags-$(oname) cflags-remove-$(oname) 9# cxxflags-$(oname) cxxflags-remove-$(oname) 10# aflags-$(oname) aflags-remove-$(oname) 11# cppflags-$(oname) cppflags-remove-$(oname) 12# incdirs-$(oname) 13# incdirs-lib$(libname)-$(sm) [if libname is defined] 14# cppflags-lib$(libname)-$(sm) [if libname is defined] 15# cflags-lib$(libname)-$(sm) [if libname is defined] 16# cxxflags-lib$(libname)-$(sm) [if libname is defined] 17# for each file found, oname is the name of the object file for corresponding 18# source file 19 20srcs := 21gen-srcs := 22asm-defines-files := 23 24uniq = $(if $1,$(firstword $1) $(call uniq,$(filter-out $(firstword $1),$1))) 25 26define process-file-vars 27# $1 is source file name 28# $2 is output file name 29cflags-$(2) := $$(cflags-y) $$(cflags-$(1)-y) 30cflags-remove-$(2) := $$(cflags-remove-y) $$(cflags-remove-$(1)-y) 31cxxflags-$(2) := $$(cxxflags-y) $$(cxxflags-$(1)-y) 32cxxflags-remove-$(2) := $$(cxxflags-remove-y) $$(cxxflags-remove-$(1)-y) 33cppflags-$(2) := $$(cppflags-y) $$(cppflags-$(1)-y) 34cppflags-remove-$(2) := $$(cppflags-remove-y) $$(cppflags-remove-$(1)-y) 35aflags-$(2) := $$(aflags-y) $$(aflags-$(1)-y) 36aflags-remove-$(2) := $$(aflags-remove-y) $$(aflags-remove-$(1)-y) 37incdirs-$(2) := $$(thissubdir-incdirs) $$(addprefix $(sub-dir)/,$$(incdirs-$(1)-y)) 38# Clear local filename specific variables to avoid accidental reuse 39# in another subdirectory 40cflags-$(1)-y := 41cflags-remove-$(1)-y := 42cflags-lib-y := 43cxxflags-$(1)-y := 44cxxflags-remove-$(1)-y := 45cxxflags-lib-y := 46cppflags-$(1)-y := 47cppflags-remove-$(1)-y := 48cppflags-lib-y := 49aflags-$(1)-y := 50aflags-remove-$(1)-y := 51incdirs-$(1)-y := 52endef #process-file-vars 53 54define process-subdir-srcs-y 55ifeq ($$(sub-dir),.) 56srcs += $1 57oname := $(out-dir)/$(base-prefix)$(basename $1).o 58else 59ifneq ($(filter /%,$(1)),) 60# $1 is an absolute path - start with "/" 61srcs += $1 62oname := $(out-dir)/$(base-prefix)$(basename $1).o 63else 64srcs += $(sub-dir)/$1 65oname := $(out-dir)/$(base-prefix)$(basename $$(sub-dir)/$1).o 66endif 67endif 68$$(eval $$(call process-file-vars,$1,$$(oname))) 69endef #process-subdir-srcs-y 70 71define process-subdir-gensrcs-helper 72# $1 gensrc-y element 73# $2 full path and name of generated source file 74# $3 full path and name of object file compiled from source file 75# $4 full path to out directory 76# $5 y if $2 must be generated before $(sm) starts building (e.g., .h file) 77 78gen-srcs += $2 79cleanfiles += $2 80oname := $3 81 82FORCE-GENSRC$(sm): $(if $(filter y,$5),$2,) 83 84$$(addprefix $4,$$(produce-additional-$1)): $2 85 86subdir-$2 := $$(sub-dir) 87recipe-$2 := $$(recipe-$1) 88$2: $$(depends-$1) 89 @$(cmd-echo-silent) ' GEN $2' 90 $(q)mkdir -p $4 91 $(q)$$(recipe-$2) 92 93$$(eval $$(call process-file-vars,$1,$$(oname))) 94endef #process-subdir-gensrcs-helper 95 96define process-subdir-gensrcs-y 97$$(eval $$(call process-subdir-gensrcs-helper,$1,$(sub-dir-out)/$$(produce-$1),$(sub-dir-out)/$(basename $(produce-$1)).o,$(sub-dir-out),$(force-gensrc-$1))) 98endef #process-subdir-gensrcs-y 99 100define process-subdir-asm-defines-y 101asm-defines-files += $(sub-dir)/$1 102endef #process-subdir-asm-defines-y 103 104define process-subdir 105sub-dir := $1 106ifeq ($1,.) 107sub-dir-out := $(patsubst %/,%,$(out-dir)/$(base-prefix)) 108else 109sub-dir-out := $(out-dir)/$(base-prefix)$1 110endif 111 112include $1/sub.mk 113sub-subdirs := $$(addprefix $1/,$$(subdirs-y)) $$(subdirs_ext-y) 114cppflags$(sm) := $$(cppflags$(sm)) $$(global-cppflags-y) 115incdirs$(sm) := $(incdirs$(sm)) $$(addprefix $1/,$$(global-incdirs-y)) 116thissubdir-incdirs := $(out-dir)/$(base-prefix)$1 $$(addprefix $1/,$$(incdirs-y)) $$(incdirs_ext-y) 117ifneq ($$(libname),) 118incdirs-lib$$(libname)-$$(sm) := $$(incdirs-lib$$(libname)-$$(sm)) $$(addprefix $1/,$$(incdirs-lib-y)) 119cflags-lib$$(libname)-$$(sm) := $$(cflags-lib$$(libname)-$$(sm)) $$(cflags-lib-y) 120cxxflags-lib$$(libname)-$$(sm) := $$(cxxflags-lib$$(libname)-$$(sm)) $$(cxxflags-lib-y) 121cppflags-lib$$(libname)-$$(sm) := $$(cppflags-lib$$(libname)-$$(sm)) $$(cppflags-lib-y) 122endif 123 124# Process files in current directory 125$$(foreach g, $$(gensrcs-y), $$(eval $$(call process-subdir-gensrcs-y,$$(g)))) 126$$(foreach s, $$(srcs-y), $$(eval $$(call process-subdir-srcs-y,$$(s)))) 127$$(foreach a, $$(asm-defines-y), $$(eval $$(call process-subdir-asm-defines-y,$$(a)))) 128# Clear flags used when processing current directory 129srcs-y := 130cflags-y := 131cflags-lib-y := 132cxxflags-y := 133cxxflags-lib-y := 134cppflags-y := 135cppflags-lib-y := 136aflags-y := 137cflags-remove-y := 138cxxflags-remove-y := 139aflags-remove-y := 140subdirs-y := 141subdirs_ext-y := 142global-incdirs-y := 143global-cppflags-y := 144incdirs-lib-y := 145incdirs-y := 146incdirs_ext-y := 147gensrcs-y := 148this-out-dir := 149asm-defines-y := 150 151# Process subdirectories in current directory 152$$(foreach sd, $$(call uniq,$$(sub-subdirs)), $$(eval $$(call process-subdir,$$(sd)))) 153endef #process-subdir 154 155# Top subdirectories 156$(foreach sd, $(call uniq,$(subdirs)), $(eval $(call process-subdir,$(sd)))) 157