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//
// libdl
//
cc_library {
name: "libdl",
defaults: ["linux_bionic_supported"],
// NOTE: --exclude-libs=libgcc.a makes sure that any symbols libdl.so pulls from
// libgcc.a are made static to libdl.so. This in turn ensures that libraries that
// a) pull symbols from libgcc.a and b) depend on libdl.so will not rely on libdl.so
// to provide those symbols, but will instead pull them from libgcc.a. Specifically,
// we use this property to make sure libc.so has its own copy of the code from
// libgcc.a it uses.
//
// DO NOT REMOVE --exclude-libs!
ldflags: ["-Wl,--exclude-libs=libgcc.a"],
// for x86, exclude libgcc_eh.a for the same reasons as above
arch: {
arm: {
version_script: "libdl.arm.map",
ldflags: ["-Wl,--hash-style=both"],
},
arm64: {
version_script: "libdl.arm64.map",
},
mips: {
version_script: "libdl.mips.map",
},
mips64: {
version_script: "libdl.mips64.map",
},
x86: {
ldflags: [
"-Wl,--exclude-libs=libgcc_eh.a",
"-Wl,--hash-style=both",
],
version_script: "libdl.x86.map",
},
x86_64: {
ldflags: ["-Wl,--exclude-libs=libgcc_eh.a"],
version_script: "libdl.x86_64.map",
},
},
srcs: ["libdl.c", "libdl_cfi.cpp"],
cflags: [
"-Wall",
"-Wextra",
"-Wunused",
"-Werror",
],
stl: "none",
// NOTE: libdl needs __aeabi_unwind_cpp_pr0 from libgcc.a but libgcc.a needs a
// few symbols from libc. Using --no-undefined here results in having to link
// against libc creating a circular dependency which is removed and we end up
// with missing symbols. Since this library is just a bunch of stubs, we set
// LOCAL_ALLOW_UNDEFINED_SYMBOLS to remove --no-undefined from the linker flags.
allow_undefined_symbols: true,
system_shared_libs: [],
// For private/CFIShadow.h.
include_dirs: ["bionic/libc"],
// This is placeholder library the actual implementation is (currently)
// provided by the linker.
shared_libs: [ "ld-android" ],
sanitize: {
never: true,
},
}
cc_library {
// NOTE: --exclude-libs=libgcc.a makes sure that any symbols libdl.so pulls from
// libgcc.a are made static to ld-android.so. This in turn ensures that libraries that
// a) pull symbols from libgcc.a and b) depend on ld-android.so will not rely on ld-android.so
// to provide those symbols, but will instead pull them from libgcc.a. Specifically,
// we use this property to make sure libc.so has its own copy of the code from
// libgcc.a it uses.
//
// DO NOT REMOVE --exclude-libs!
ldflags: ["-Wl,--exclude-libs=libgcc.a"],
// for x86, exclude libgcc_eh.a for the same reasons as above
arch: {
x86: {
ldflags: ["-Wl,--exclude-libs=libgcc_eh.a"],
},
x86_64: {
ldflags: ["-Wl,--exclude-libs=libgcc_eh.a"],
},
},
srcs: ["ld_android.c"],
cflags: [
"-Wall",
"-Wextra",
"-Wunused",
"-Werror",
],
stl: "none",
name: "ld-android",
// NOTE: libdl needs __aeabi_unwind_cpp_pr0 from libgcc.a but libgcc.a needs a
// few symbols from libc. Using --no-undefined here results in having to link
// against libc creating a circular dependency which is removed and we end up
// with missing symbols. Since this library is just a bunch of stubs, we set
// LOCAL_ALLOW_UNDEFINED_SYMBOLS to remove --no-undefined from the linker flags.
allow_undefined_symbols: true,
system_shared_libs: [],
sanitize: {
never: true,
},
}
ndk_library {
name: "libdl.ndk",
symbol_file: "libdl.map.txt",
first_version: "9",
}
|
