libdl/Android.mk

   1 LOCAL_PATH:= $(call my-dir)
   2
   3 #
   4 # libdl
   5 #
   6
   7 include $(CLEAR_VARS)
   8
   9 # NOTE: --exclude-libs=libgcc.a makes sure that any symbols libdl.so pulls from
  10 # libgcc.a are made static to libdl.so.  This in turn ensures that libraries that
  11 # a) pull symbols from libgcc.a and b) depend on libdl.so will not rely on libdl.so
  12 # to provide those symbols, but will instead pull them from libgcc.a.  Specifically,
  13 # we use this property to make sure libc.so has its own copy of the code from
  14 # libgcc.a it uses.
  15 #
  16 # DO NOT REMOVE --exclude-libs!
  17
  18 LOCAL_LDFLAGS := -Wl,--exclude-libs=libgcc.a
  19
  20 # for x86, exclude libgcc_eh.a for the same reasons as above
  21 LOCAL_LDFLAGS_x86 := -Wl,--exclude-libs=libgcc_eh.a
  22 LOCAL_LDFLAGS_x86_64 := $(LOCAL_LDFLAGS_x86)
  23
  24 LOCAL_LDFLAGS_arm    += -Wl,--version-script=$(LOCAL_PATH)/libdl.arm.map
  25 LOCAL_LDFLAGS_arm64  += -Wl,--version-script=$(LOCAL_PATH)/libdl.arm64.map
  26 LOCAL_LDFLAGS_mips   += -Wl,--version-script=$(LOCAL_PATH)/libdl.mips.map
  27 LOCAL_LDFLAGS_mips64 += -Wl,--version-script=$(LOCAL_PATH)/libdl.mips64.map
  28 LOCAL_LDFLAGS_x86    += -Wl,--version-script=$(LOCAL_PATH)/libdl.x86.map
  29 LOCAL_LDFLAGS_x86_64 += -Wl,--version-script=$(LOCAL_PATH)/libdl.x86_64.map
  30
  31 LOCAL_SRC_FILES:= libdl.c
  32 LOCAL_CFLAGS := -Wall -Wextra -Wunused -Werror
  33 LOCAL_CXX_STL := none
  34
  35 LOCAL_MODULE := libdl
  36 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk \
  37                                  $(LOCAL_PATH)/libdl.arm.map \
  38                                  $(LOCAL_PATH)/libdl.arm64.map \
  39                                  $(LOCAL_PATH)/libdl.mips.map \
  40                                  $(LOCAL_PATH)/libdl.mips64.map \
  41                                  $(LOCAL_PATH)/libdl.x86.map \
  42                                  $(LOCAL_PATH)/libdl.x86_64.map \
  43
  44 # NOTE: libdl needs __aeabi_unwind_cpp_pr0 from libgcc.a but libgcc.a needs a
  45 # few symbols from libc. Using --no-undefined here results in having to link
  46 # against libc creating a circular dependency which is removed and we end up
  47 # with missing symbols. Since this library is just a bunch of stubs, we set
  48 # LOCAL_ALLOW_UNDEFINED_SYMBOLS to remove --no-undefined from the linker flags.
  49 LOCAL_ALLOW_UNDEFINED_SYMBOLS := true
  50 LOCAL_SYSTEM_SHARED_LIBRARIES :=
  51
  52 LOCAL_SANITIZE := never
  53 include $(BUILD_SHARED_LIBRARY)
  54
  55 # A dummy libdl.a. Need for static executables using the LLVM unwinder. Most
  56 # functions default to failure, others use a sensible default (dl_iterate_phdr()
  57 # returns 0, as would happen if the user iterated over every phdr).
  58 include $(CLEAR_VARS)
  59 LOCAL_SRC_FILES:= libdl.c
  60 LOCAL_CFLAGS := -Wall -Wextra -Wunused -Werror
  61 LOCAL_CXX_STL := none
  62
  63 LOCAL_MODULE := libdl
  64 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
  65 LOCAL_SANITIZE := never
  66 include $(BUILD_STATIC_LIBRARY)