libc/crt.mk

   1 # Define the libc run-time (crt) support object files that must be built,
   2 # which are needed to build all other objects (shared/static libs and
   3 # executables)
   4 # ==========================================================================
   5 # AArch64, ARM, MIPS, and x86 all need crtbegin_so/crtend_so.
   6 #
   7 # For x86, the .init section must point to a function that calls all
   8 # entries in the .ctors section. (on ARM this is done through the
   9 # .init_array section instead).
  10 #
  11 # For all the platforms, the .fini_array section must point to a function
  12 # that will call __cxa_finalize(&__dso_handle) in order to ensure that
  13 # static C++ destructors are properly called on dlclose().
  14 #
  15 # Args:
  16 #     my_2nd_arch_prefix: set to $(TARGET_2ND_ARCH_VAR_PREFIX) if it's
  17 #                         for the 2nd arch; otherwise empty.
  18
  19 my_arch := $(TARGET_$(my_2nd_arch_prefix)ARCH)
  20
  21 my_libc_crt_target_crtbegin_file := $(libc_crt_target_crtbegin_file_$(my_arch))
  22 my_libc_crt_target_crtbegin_so_file := $(libc_crt_target_crtbegin_so_file_$(my_arch))
  23
  24 my_libc_crt_target_cflags := \
  25     $(libc_crt_target_cflags) \
  26     $(libc_crt_target_cflags_$(my_arch))
  27
  28 my_libc_crt_target_so_cflags := \
  29     $(libc_crt_target_so_cflags_$(my_arch)) \
  30     $(my_libc_crt_target_cflags)
  31
  32 my_libc_crt_target_ldflags := $(libc_crt_target_ldflags_$(my_arch))
  33
  34 # crtbrand.S -> crtbrand.o
  35 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
  36 $(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
  37 $(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_so_cflags)
  38 $(GEN): $(LOCAL_PATH)/arch-common/bionic/crtbrand.S
  39         @mkdir -p $(dir $@)
  40         $(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
  41                 -MD -MF $(@:%.o=%.d) -o $@ -c $<
  42         $(transform-d-to-p)
  43 -include $(GEN:%.o=%.P)
  44
  45 # crtbegin_so.c -> crtbegin_so1.o
  46 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so1.o
  47 $(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
  48 $(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_so_cflags)
  49 $(GEN): $(my_libc_crt_target_crtbegin_so_file)
  50         @mkdir -p $(dir $@)
  51         $(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
  52                 -MD -MF $(@:%.o=%.d) -o $@ -c $<
  53         $(transform-d-to-p)
  54 -include $(GEN:%.o=%.P)
  55
  56 # crtbegin_so1.o + crtbrand.o -> crtbegin_so.o
  57 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
  58 $(GEN): PRIVATE_LD := $($(my_2nd_arch_prefix)TARGET_LD)
  59 $(GEN): PRIVATE_LDFLAGS := $(my_libc_crt_target_ldflags)
  60 $(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so1.o \
  61     $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
  62         @mkdir -p $(dir $@)
  63         $(hide) $(PRIVATE_LD) $(PRIVATE_LDFLAGS) -r -o $@ $^
  64
  65 # crtend_so.S -> crtend_so.o
  66 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
  67 $(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
  68 $(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_so_cflags)
  69 $(GEN): $(LOCAL_PATH)/arch-common/bionic/crtend_so.S
  70         @mkdir -p $(dir $@)
  71         $(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
  72                 -MD -MF $(@:%.o=%.d) -o $@ -c $<
  73         $(transform-d-to-p)
  74 -include $(GEN:%.o=%.P)
  75
  76 # crtbegin_so.o and crtend_so.o are installed to device
  77 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_SHARED_LIBRARIES)/crtbegin_so.o
  78 $(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_so.o
  79         $(hide) mkdir -p $(dir $@) && cp -f $< $@
  80 ALL_GENERATED_SOURCES += $(GEN)
  81
  82 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_SHARED_LIBRARIES)/crtend_so.o
  83 $(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_so.o
  84         $(hide) mkdir -p $(dir $@) && cp -f $< $@
  85 ALL_GENERATED_SOURCES += $(GEN)
  86
  87 # crtbegin.c -> crtbegin_static1.o
  88 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static1.o
  89 $(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
  90 $(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_cflags)
  91 $(GEN): $(my_libc_crt_target_crtbegin_file)
  92         @mkdir -p $(dir $@)
  93         $(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
  94                 -MD -MF $(@:%.o=%.d) -o $@ -c $<
  95         $(transform-d-to-p)
  96 -include $(GEN:%.o=%.P)
  97
  98 # crtbegin_static1.o + crtbrand.o -> crtbegin_static.o
  99 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static.o
 100 $(GEN): PRIVATE_LD := $($(my_2nd_arch_prefix)TARGET_LD)
 101 $(GEN): PRIVATE_LDFLAGS := $(my_libc_crt_target_ldflags)
 102 $(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_static1.o \
 103     $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
 104         @mkdir -p $(dir $@)
 105         $(hide) $(PRIVATE_LD) $(PRIVATE_LDFLAGS) -r -o $@ $^
 106
 107 # crtbegin.c -> crtbegin_dynamic1.o
 108 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic1.o
 109 $(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
 110 $(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_cflags)
 111 $(GEN): $(my_libc_crt_target_crtbegin_file)
 112         @mkdir -p $(dir $@)
 113         $(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
 114                 -MD -MF $(@:%.o=%.d) -o $@ -c $<
 115         $(transform-d-to-p)
 116 -include $(GEN:%.o=%.P)
 117
 118 # crtbegin_dynamic1.o + crtbrand.o -> crtbegin_dynamic.o
 119 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic.o
 120 $(GEN): PRIVATE_LD := $($(my_2nd_arch_prefix)TARGET_LD)
 121 $(GEN): PRIVATE_LDFLAGS := $(my_libc_crt_target_ldflags)
 122 $(GEN): $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbegin_dynamic1.o \
 123     $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtbrand.o
 124         @mkdir -p $(dir $@)
 125         $(hide) $(PRIVATE_LD) $(PRIVATE_LDFLAGS) -r -o $@ $^
 126
 127 # crtend.S -> crtend_android.o
 128 # We rename crtend.o to crtend_android.o to avoid a
 129 # name clash between gcc and bionic.
 130 GEN := $($(my_2nd_arch_prefix)TARGET_OUT_INTERMEDIATE_LIBRARIES)/crtend_android.o
 131 $(GEN): PRIVATE_CC := $($(my_2nd_arch_prefix)TARGET_CC)
 132 $(GEN): PRIVATE_CFLAGS := $(my_libc_crt_target_cflags)
 133 $(GEN): $(LOCAL_PATH)/arch-common/bionic/crtend.S
 134         @mkdir -p $(dir $@)
 135         $(hide) $(PRIVATE_CC) $(PRIVATE_CFLAGS) \
 136                 -MD -MF $(@:%.o=%.d) -o $@ -c $<
 137         $(transform-d-to-p)
 138 -include $(GEN:%.o=%.P)
 139
 140 # Clear temp vars
 141 my_libc_crt_target_ldflags :=
 142 my_libc_crt_target_so_cflags :=
 143 my_libc_crt_target_cflags :=
 144 my_libc_crt_target_crtbegin_so_file :=
 145 my_libc_crt_target_crtbegin_file :=
 146 my_arch :=