Function CheckAndroidVersion

layers/vk_layer_config.cpp:169–191

This catches before dlopen fails if the default Android-26 layers are being used and attempted to be ran on Android 25 or below

// This catches before dlopen fails if the default Android-26 layers are being used and attempted to be ran on Android 25 or below
void __attribute__((constructor)) CheckAndroidVersion() {
    const std::string version = GetEnvironment("ro.build.version.sdk");

    if (version.empty()) {
        return;
    }

    constexpr uint32_t target_android_api = 26;
    constexpr uint32_t android_api = __ANDROID_API__;

    static_assert(android_api >= target_android_api, "Vulkan-ValidationLayers is not supported on Android 25 and below");

    uint32_t queried_version{};

    if (std::from_chars(version.data(), version.data() + version.size(), queried_version).ec != std::errc()) {
        return;
    }

    if (queried_version < target_android_api) {
        __android_log_print(ANDROID_LOG_FATAL, "VALIDATION", "ERROR - Android version is %d and needs to be 26 or above.",
                            queried_version);
    }
}

#endif