scripts/Makefile.build

   1 # our default target
   2 .PHONY: all
   3 all:
   4
   5 include $(TOPDIR)/config.mk
   6
   7 # variable LIB is used in examples/standalone/Makefile
   8 __LIB := $(obj)built-in.o
   9 LIBGCC = $(obj)libgcc.o
  10 SRCS :=
  11 subdir-y :=
  12 obj-dirs :=
  13
  14 include Makefile
  15
  16 # Do not include host rules unless needed
  17 ifneq ($(hostprogs-y)$(hostprogs-m),)
  18 include $(SRCTREE)/scripts/Makefile.host.tmp
  19 endif
  20
  21 # Going forward use the following
  22 obj-y := $(sort $(obj-y))
  23 extra-y := $(sort $(extra-y))
  24 always := $(sort $(always))
  25 lib-y := $(sort $(lib-y))
  26
  27 subdir-y        += $(patsubst %/,%,$(filter %/, $(obj-y)))
  28 obj-y           := $(patsubst %/, %/built-in.o, $(obj-y))
  29 subdir-obj-y    := $(filter %/built-in.o, $(obj-y))
  30 subdir-obj-y    := $(addprefix $(obj),$(subdir-obj-y))
  31
  32 SRCS    += $(wildcard $(obj-y:.o=.c) $(obj-y:.o=.S) $(lib-y:.o=.c) \
  33         $(lib-y:.o=.S) $(extra-y:.o=.c) $(extra-y:.o=.S))
  34 OBJS    := $(addprefix $(obj),$(obj-y))
  35
  36 # $(obj-dirs) is a list of directories that contain object files
  37
  38 obj-dirs += $(dir $(OBJS))
  39
  40 # Create directories for object files if directory does not exist
  41 # Needed when obj-y := dir/file.o syntax is used
  42 _dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
  43
  44 LGOBJS := $(addprefix $(obj),$(sort $(lib-y)))
  45
  46 all: $(__LIB) $(addprefix $(obj),$(extra-y) $(always)) $(subdir-y)
  47
  48 $(__LIB):       $(obj).depend $(OBJS)
  49         $(call cmd_link_o_target, $(OBJS))
  50
  51 ifneq ($(strip $(lib-y)),)
  52 all: $(LIBGCC)
  53
  54 $(LIBGCC): $(obj).depend $(LGOBJS)
  55         $(call cmd_link_o_target, $(LGOBJS))
  56 endif
  57
  58 ifneq ($(subdir-obj-y),)
  59 # Descending
  60 $(subdir-obj-y): $(subdir-y)
  61 endif
  62
  63 ifneq ($(subdir-y),)
  64 $(subdir-y): FORCE
  65         $(MAKE) -C $@ -f $(TOPDIR)/scripts/Makefile.build
  66 endif
  67
  68 #########################################################################
  69
  70 # Allow boards to use custom optimize flags on a per dir/file basis
  71 ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
  72 ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
  73 EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
  74 ALL_CFLAGS += $(EXTRA_CPPFLAGS)
  75
  76 # The _DEP version uses the $< file target (for dependency generation)
  77 # See rules.mk
  78 EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
  79                 $(CPPFLAGS_$(BCURDIR))
  80 $(obj)%.s:      %.S
  81         $(CPP) $(ALL_AFLAGS) -o $@ $<
  82 $(obj)%.o:      %.S
  83         $(CC)  $(ALL_AFLAGS) -o $@ $< -c
  84 $(obj)%.o:      %.c
  85 ifneq ($(CHECKSRC),0)
  86         $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
  87 endif
  88         $(CC)  $(ALL_CFLAGS) -o $@ $< -c
  89 $(obj)%.i:      %.c
  90         $(CPP) $(ALL_CFLAGS) -o $@ $< -c
  91 $(obj)%.s:      %.c
  92         $(CC)  $(ALL_CFLAGS) -o $@ $< -c -S
  93
  94 # If the list of objects to link is empty, just create an empty built-in.o
  95 cmd_link_o_target = $(if $(strip $1),\
  96                       $(LD) $(LDFLAGS) -r -o $@ $1,\
  97                       rm -f $@; $(AR) rcs $@ )
  98
  99 #########################################################################
 100
 101 # defines $(obj).depend target
 102
 103 include $(TOPDIR)/rules.mk
 104
 105 sinclude $(obj).depend
 106
 107 #########################################################################
 108
 109 .PHONY: FORCE