Android.bp

srcs_opt = [
    "adler32_simd.c",
    // See https://chromium-review.googlesource.com/749732.
// TODO: causes `atest org.apache.harmony.tests.java.util.zip.DeflaterTest` failures.
//    "contrib/optimizations/inffast_chunk.c",
//    "contrib/optimizations/inflate.c",
    // This file doesn't build for non-neon, so it can't be in the main srcs.
    "cpu_features.c",
    "crc32_simd.c",
]

cflags_arm = [
    // Since we're building for the platform, we claim to be Linux rather than
    // Android so we use getauxval() directly instead of the NDK
    // android_getCpuFeatures which isn't available to us anyway.
    "-DARMV8_OS_LINUX",
    // Testing with zlib_bench shows -O3 is a win for ARM but a bit of a wash
    // for x86, so match the BUILD file in only enabling this for ARM.
    "-O3",
]
cflags_arm_neon = [
    // We no longer support non-Neon platform builds, but the NDK just has one libz.
    "-DADLER32_SIMD_NEON",
// TODO: causes `atest org.apache.harmony.tests.java.util.zip.DeflaterTest` failures.
//    "-DINFLATE_CHUNK_SIMD_NEON",
    // HWCAP_CRC32 is checked at runtime, so it's okay to turn crc32
    // acceleration on for both 32- and 64-bit.
    "-DCRC32_ARMV8_CRC32",
]
cflags_arm64 = cflags_arm + cflags_arm_neon

cflags_x86 = [
    // See ARMV8_OS_LINUX above.
    "-DX86_NOT_WINDOWS",
    // Android's x86/x86-64 ABI includes SSE2 and SSSE3.
    "-DADLER32_SIMD_SSSE3",
// TODO: see arm above.
//    "-DINFLATE_CHUNK_SIMD_SSE2",
    // TODO: ...but the host build system defaults don't match our official ABI.
    "-mssse3",
    // PCLMUL isn't in the ABI, but it won't actually be used unless CPUID
    // reports that the processor really does have the instruction.
    "-mpclmul",
    "-DCRC32_SIMD_SSE42_PCLMUL",
]
srcs_x86 = [
    "crc_folding.c",
    "fill_window_sse.c",
] + srcs_opt

// This optimization is applicable to arm64 and x86-64.
cflags_64 = ["-DINFLATE_CHUNK_READ_64LE"]

cc_defaults {
    name: "libz_defaults",

    cflags: [
        // We do support hidden visibility, so turn that on.
        "-DHAVE_HIDDEN",
        // We do support const, so turn that on.
        "-DZLIB_CONST",
        "-Wall",
        "-Werror",
        "-Wno-unused",
        "-Wno-unused-parameter",
    ],
    stl: "none",
    export_include_dirs: ["."],
    srcs: [
        "adler32.c",
        "compress.c",
        "crc32.c",
        "deflate.c",
        "gzclose.c",
        "gzlib.c",
        "gzread.c",
        "gzwrite.c",
        "infback.c",
        "inffast.c",
        "inflate.c",
        "inftrees.c",
        "trees.c",
        "uncompr.c",
        "zutil.c",
    ],

    arch: {
        arm: {
            // TODO: This is to work around b/24465209. Remove after root cause
            // is fixed.
            pack_relocations: false,
            ldflags: ["-Wl,--hash-style=both"],

            cflags: cflags_arm,
            neon: {
                cflags: cflags_arm_neon,
                srcs: srcs_opt,
            }
        },
        arm64: {
            cflags: cflags_arm64 + cflags_64,
            srcs: srcs_opt,
        },
        x86: {
            cflags: cflags_x86,
            srcs: srcs_x86,
        },
        x86_64: {
            cflags: cflags_x86 + cflags_64,
            srcs: srcs_x86,
        },
    },
}

cc_library {
    name: "libz",
    defaults: ["libz_defaults"],

    host_supported: true,
    unique_host_soname: true,
    static_ndk_lib: true,

    vendor_available: true,
    vndk: {
        enabled: true,
        support_system_process: true,
    },
    ramdisk_available: true,
    recovery_available: true,
    native_bridge_supported: true,

    target: {
        linux_bionic: {
            enabled: true,
        },
        windows: {
            enabled: true,
        },
    },
}

// libz_current allows modules building against the NDK to have access to zlib
// API that's not available from the NDK libz.
cc_library_static {
    name: "libz_current",
    defaults: ["libz_defaults"],
    sdk_version: "current",
}

cc_binary_host {
    name: "minigzip",
    srcs: ["contrib/minigzip/minigzip.c"],
    cflags: ["-Wall", "-Werror", "-DUSE_MMAP"],
    static_libs: ["libz"],
    stl: "none",
}

cc_binary {
    name: "zlib_bench",
    srcs: ["contrib/bench/zlib_bench.cc"],
    cflags: ["-Wall", "-Werror"],
    host_supported: true,
    shared_libs: ["libz"],
    // We build zlib_bench32 and zlib_bench64 so it's easy to test LP32.
    compile_multilib: "both",
    multilib: {
        lib32: { suffix: "32", },
        lib64: { suffix: "64", },
    },
}

// This module is defined in development/ndk/Android.bp. Updating these headers
// to be usable for any API level is going to be some work (at the very least,
// there's a ZLIB_VERNUM that will need to be handled since early versions of
// Android did not have all the APIs that calling code will use if this is set
// to the current value.
//
// The NDK never updated the zlib headers when the platform updated, so until we
// solve this the NDK will continue shipping the old headers.
//
// ndk_headers {
//     name: "libz_headers",
//     from: "src",
//     to: "",
//     srcs: [
//         "src/zconf.h",
//         "src/zlib.h",
//     ],
//     license: "NOTICE",
// }

ndk_library {
    name: "libz",
    symbol_file: "libz.map.txt",
    first_version: "9",
    unversioned_until: "current",
}