Android.bp

// Copyright (C) 2026 The OpenIntelligenceRuntime Project
// Licensed under the Apache License, Version 2.0
//
// ONNX Runtime prebuilt for AOSP — v0.4 / OIR audio.synthesize + vision.detect.
//
// We wrap Microsoft's official Android prebuilt .so rather than building ORT
// from source. ORT's source tree is ~500 MB + requires bazel/CMake
// gymnastics, and upstream publishes stable per-ABI .so files already
// optimized for mobile. The speed win of a custom build is marginal here —
// ORT is used for small detection/synthesis models (tens of MB each), not
// giant text models where we'd care about every cycle.
//
// Release pinned: ORT v1.20.0.
// Source: https://github.com/microsoft/onnxruntime/releases/download/v1.20.0/
//
// The .so and headers are NOT committed to this repo (too big + upstream
// licensing). Fetch them with ./fetch-prebuilts.sh which unpacks the
// official .aar into prebuilts/<abi>/libonnxruntime.so and copies headers
// into include/. CI will refuse to build if the prebuilts are missing and
// print the fetch command.

package {
    default_applicable_licenses: ["Android-Apache-2.0"],
}

cc_prebuilt_library_shared {
    name: "libonnxruntime",
    // Install to /system_ext/lib64 (A16 generic_system.mk blocks non-approved
    // .so files from /system/lib64; same reason oird lives in /system_ext/bin).
    system_ext_specific: true,
    vendor_available: true,
    product_available: true,
    strip: {
        none: true,  // ORT's upstream .so is already stripped
    },

    // ORT's Android prebuilt has DT_NEEDED on liblog; declare it so Soong's
    // check_elf_file verifier passes. No other AOSP deps needed.
    shared_libs: [
        "liblog",
    ],

    target: {
        android_arm64: {
            srcs: ["prebuilts/arm64-v8a/libonnxruntime.so"],
        },
        android_x86_64: {
            srcs: ["prebuilts/x86_64/libonnxruntime.so"],
        },
        // No arm / x86 32-bit: AOSP 16 reference devices are 64-bit only.
    },

    export_include_dirs: [
        "include",
    ],

    // ORT pulls in stdc++ RTTI + exceptions; AOSP cc_binary consumers
    // already carry these so we don't redeclare.
}