1LOCAL_PATH:= $(call my-dir)
2
3#
4# libdl
5#
6
7include $(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
18LOCAL_LDFLAGS := -Wl,--exclude-libs=libgcc.a
19
20# for x86, exclude libgcc_eh.a for the same reasons as above
21LOCAL_LDFLAGS_x86 := -Wl,--exclude-libs=libgcc_eh.a
22LOCAL_LDFLAGS_x86_64 := $(LOCAL_LDFLAGS_x86)
23
24LOCAL_LDFLAGS_arm    += -Wl,--version-script=$(LOCAL_PATH)/libdl.arm.map
25LOCAL_LDFLAGS_arm64  += -Wl,--version-script=$(LOCAL_PATH)/libdl.arm64.map
26LOCAL_LDFLAGS_mips   += -Wl,--version-script=$(LOCAL_PATH)/libdl.mips.map
27LOCAL_LDFLAGS_mips64 += -Wl,--version-script=$(LOCAL_PATH)/libdl.mips64.map
28LOCAL_LDFLAGS_x86    += -Wl,--version-script=$(LOCAL_PATH)/libdl.x86.map
29LOCAL_LDFLAGS_x86_64 += -Wl,--version-script=$(LOCAL_PATH)/libdl.x86_64.map
30
31LOCAL_SRC_FILES:= libdl.c
32LOCAL_CFLAGS := -Wall -Wextra -Wunused -Werror
33LOCAL_CXX_STL := none
34
35LOCAL_MODULE := libdl
36LOCAL_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.
49LOCAL_ALLOW_UNDEFINED_SYMBOLS := true
50LOCAL_SYSTEM_SHARED_LIBRARIES :=
51
52LOCAL_SANITIZE := never
53include $(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).
58include $(CLEAR_VARS)
59LOCAL_SRC_FILES:= libdl.c
60LOCAL_CFLAGS := -Wall -Wextra -Wunused -Werror
61LOCAL_CXX_STL := none
62
63LOCAL_MODULE := libdl
64LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
65LOCAL_SANITIZE := never
66include $(BUILD_STATIC_LIBRARY)
67