platform_bionic/libdl/Android.bp

//
// libdl
//
package {
    default_applicable_licenses: ["bionic_libdl_license"],
}

license {
    name: "bionic_libdl_license",
    visibility: [":__subpackages__"],
    license_kinds: [
        "SPDX-license-identifier-Apache-2.0",
    ],
    license_text: [
        "NOTICE",
    ],
}

cc_library_static {
    name: "libdl_static",
    defaults: ["linux_bionic_supported"],
    ramdisk_available: true,
    vendor_ramdisk_available: true,
    recovery_available: true,
    native_bridge_supported: true,

    srcs: [
        "libdl.cpp",
        "libdl_cfi.cpp",
    ],

    cflags: [
        "-Wall",
        "-Wextra",
        "-Wunused",
        "-Werror",
    ],

    // For private/CFIShadow.h.
    include_dirs: ["bionic/libc"],

    stl: "none",
    system_shared_libs: [],
    header_libs: ["libc_headers"],
    export_header_lib_headers: ["libc_headers"],

    sanitize: {
        never: true,
    },
}

cc_library {
    name: "libdl",
    ramdisk_available: true,
    vendor_ramdisk_available: true,
    recovery_available: true,
    native_bridge_supported: true,
    static_ndk_lib: true,

    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",
        "-Wl,--exclude-libs=libgcc_stripped.a",
        "-Wl,--exclude-libs=libclang_rt.builtins-arm-android.a",
        "-Wl,--exclude-libs=libclang_rt.builtins-aarch64-android.a",
        "-Wl,--exclude-libs=libclang_rt.builtins-i686-android.a",
        "-Wl,--exclude-libs=libclang_rt.builtins-x86_64-android.a",
    ],

    // for x86, exclude libgcc_eh.a for the same reasons as above
    arch: {
        arm: {
            version_script: ":libdl.arm.map",
            pack_relocations: false,
            ldflags: ["-Wl,--hash-style=both"],
        },
        arm64: {
            version_script: ":libdl.arm64.map",
        },
        x86: {
            pack_relocations: false,
            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",
        },
    },
    shared: {
        whole_static_libs: ["libdl_static"],
    },
    static: {
        srcs: ["libdl_static.cpp"],
    },
    cflags: [
        "-Wall",
        "-Wextra",
        "-Wunused",
        "-Werror",
    ],
    stl: "none",

    nocrt: true,
    system_shared_libs: [],
    header_libs: ["libc_headers"],

    // Opt out of native_coverage when opting out of system_shared_libs
    native_coverage: false,

    // This is placeholder library the actual implementation is (currently)
    // provided by the linker.
    shared_libs: ["ld-android"],

    sanitize: {
        never: true,
    },

    stubs: {
        symbol_file: "libdl.map.txt",
        versions: [
            "29",
            "current",
        ],
    },
    llndk: {
        symbol_file: "libdl.map.txt",
    },

    apex_available: [
        "//apex_available:platform",
        "com.android.runtime",
    ],

    lto: {
        never: true,
    },
}

cc_library {
    name: "libdl_android",

    defaults: ["linux_bionic_supported"],
    ramdisk_available: true,
    vendor_ramdisk_available: true,
    recovery_available: true,
    native_bridge_supported: true,

    // 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",
        "-Wl,--exclude-libs=libgcc_stripped.a",
        "-Wl,--exclude-libs=libclang_rt.builtins-arm-android.a",
        "-Wl,--exclude-libs=libclang_rt.builtins-aarch64-android.a",
        "-Wl,--exclude-libs=libclang_rt.builtins-i686-android.a",
        "-Wl,--exclude-libs=libclang_rt.builtins-x86_64-android.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: [ "libdl_android.cpp" ],
    version_script: "libdl_android.map.txt",

    cflags: [
        "-Wall",
        "-Wextra",
        "-Wunused",
        "-Werror",
    ],

    stl: "none",

    nocrt: true,
    system_shared_libs: [],
    header_libs: ["libc_headers"],

    // Opt out of native_coverage when opting out of system_shared_libs
    native_coverage: false,

    // This is placeholder library the actual implementation is (currently)
    // provided by the linker.
    shared_libs: ["ld-android"],

    sanitize: {
        never: true,
    },

    stubs: {
        symbol_file: "libdl_android.map.txt",
        versions: ["current"],
    },

    apex_available: [
        "//apex_available:platform",
        "com.android.runtime",
    ],

    lto: {
        never: true,
    },
}

ndk_library {
    name: "libdl",
    symbol_file: "libdl.map.txt",
    first_version: "9",
}

genrule {
    name: "libdl.arm.map",
    out: ["libdl.arm.map"],
    srcs: ["libdl.map.txt"],
    tools: ["generate-version-script"],
    cmd: "$(location generate-version-script) arm $(in) $(out)",
}

genrule {
    name: "libdl.arm64.map",
    out: ["libdl.arm64.map"],
    srcs: ["libdl.map.txt"],
    tools: ["generate-version-script"],
    cmd: "$(location generate-version-script) arm64 $(in) $(out)",
}

genrule {
    name: "libdl.x86.map",
    out: ["libdl.x86.map"],
    srcs: ["libdl.map.txt"],
    tools: ["generate-version-script"],
    cmd: "$(location generate-version-script) x86 $(in) $(out)",
}

genrule {
    name: "libdl.x86_64.map",
    out: ["libdl.x86_64.map"],
    srcs: ["libdl.map.txt"],
    tools: ["generate-version-script"],
    cmd: "$(location generate-version-script) x86_64 $(in) $(out)",
}