Android.mk revision 79fd668bb4ddb22432eeda2ebd8d10359013d9a8
1LOCAL_PATH:= $(call my-dir)
2
3#
4# libdl
5#
6
7include $(CLEAR_VARS)
8
9# NOTE: --exclude-libs=libgcc.a makes sure that any symbols libdl.so pulls from
10# libgcc.a are made static to libdl.so.  This in turn ensures that libraries that
11# a) pull symbols from libgcc.a and b) depend on libdl.so will not rely on libdl.so
12# to provide those symbols, but will instead pull them from libgcc.a.  Specifically,
13# we use this property to make sure libc.so has its own copy of the code from
14# libgcc.a it uses.
15#
16# DO NOT REMOVE --exclude-libs!
17
18LOCAL_LDFLAGS := -Wl,--exclude-libs=libgcc.a -Wl,--version-script=$(LOCAL_PATH)/libdl.map
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_SRC_FILES:= libdl.c
25LOCAL_CFLAGS := -Wall -Wextra -Wunused -Werror
26LOCAL_CXX_STL := none
27
28LOCAL_MODULE := libdl
29LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
30
31# NOTE: libdl needs __aeabi_unwind_cpp_pr0 from libgcc.a but libgcc.a needs a
32# few symbols from libc. Using --no-undefined here results in having to link
33# against libc creating a circular dependency which is removed and we end up
34# with missing symbols. Since this library is just a bunch of stubs, we set
35# LOCAL_ALLOW_UNDEFINED_SYMBOLS to remove --no-undefined from the linker flags.
36LOCAL_ALLOW_UNDEFINED_SYMBOLS := true
37LOCAL_SYSTEM_SHARED_LIBRARIES :=
38
39LOCAL_ADDRESS_SANITIZER := false
40include $(BUILD_SHARED_LIBRARY)
41
42# A dummy libdl.a. Need for static executables using the LLVM unwinder. Most
43# functions default to failure, others use a sensible default (dl_iterate_phdr()
44# returns 0, as would happen if the user iterated over every phdr).
45include $(CLEAR_VARS)
46LOCAL_SRC_FILES:= libdl.c
47LOCAL_CFLAGS := -Wall -Wextra -Wunused -Werror
48LOCAL_CXX_STL := none
49
50LOCAL_MODULE := libdl
51LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
52LOCAL_ADDRESS_SANITIZER := false
53include $(BUILD_STATIC_LIBRARY)
54