1 // 2 // libdl 3 // 4 cc_library { 5 6 // NOTE: --exclude-libs=libgcc.a makes sure that any symbols libdl.so pulls from 7 // libgcc.a are made static to libdl.so. This in turn ensures that libraries that 8 // a) pull symbols from libgcc.a and b) depend on libdl.so will not rely on libdl.so 9 // to provide those symbols, but will instead pull them from libgcc.a. Specifically, 10 // we use this property to make sure libc.so has its own copy of the code from 11 // libgcc.a it uses. 12 // 13 // DO NOT REMOVE --exclude-libs! 14 15 ldflags: ["-Wl,--exclude-libs=libgcc.a"], 16 17 // for x86, exclude libgcc_eh.a for the same reasons as above 18 arch: { 19 arm: { 20 version_script: "libdl.arm.map", 21 }, 22 arm64: { 23 version_script: "libdl.arm64.map", 24 }, 25 mips: { 26 version_script: "libdl.mips.map", 27 }, 28 mips64: { 29 version_script: "libdl.mips64.map", 30 }, 31 x86: { 32 ldflags: ["-Wl,--exclude-libs=libgcc_eh.a"], 33 version_script: "libdl.x86.map", 34 }, 35 x86_64: { 36 ldflags: ["-Wl,--exclude-libs=libgcc_eh.a"], 37 version_script: "libdl.x86_64.map", 38 }, 39 }, 40 srcs: ["libdl.c"], 41 cflags: [ 42 "-Wall", 43 "-Wextra", 44 "-Wunused", 45 "-Werror", 46 ], 47 stl: "none", 48 49 name: "libdl", 50 51 // NOTE: libdl needs __aeabi_unwind_cpp_pr0 from libgcc.a but libgcc.a needs a 52 // few symbols from libc. Using --no-undefined here results in having to link 53 // against libc creating a circular dependency which is removed and we end up 54 // with missing symbols. Since this library is just a bunch of stubs, we set 55 // LOCAL_ALLOW_UNDEFINED_SYMBOLS to remove --no-undefined from the linker flags. 56 allow_undefined_symbols: true, 57 system_shared_libs: [], 58 59 sanitize: ["never"], 60 } 61
