You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: build.rs
    path of file: ./repos/tquic/src
    
    the code of the file until where you have to start completion: // Copyright (c) 2023 The TQUIC Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/// Additional parameters for Android
const CMAKE_PARAMS_ANDROID_ND
    
fn new_boringssl_cmake_config() -> cmake::Config {
    let arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
    let os = std::env::var("CARGO_CFG_TARGET_OS").unwrap();

    let mut boringssl_cmake = cmake::Config::new("deps/boringssl");

    match os.as_ref() {
        "android" => {
            for (android_arch, params) in CMAKE_PARAMS_ANDROID_NDK {
                if *android_arch == arch {
                    for (name, value) in *params {
                        boringssl_cmake.define(name, value);
                    }
                    break;
                }
            }

            let android_ndk_home = std::env::var("ANDROID_NDK_HOME")
                .expect("Please set ANDROID_NDK_HOME for Android build");
            let android_ndk_home = std::path::Path::new(&android_ndk_home);
            let toolchain_file = android_ndk_home.join("build/cmake/android.toolchain.cmake");
            let toolchain_file = toolchain_file.to_str().unwrap();
            boringssl_cmake.define("CMAKE_TOOLCHAIN_FILE", toolchain_file);

            boringssl_cmake.define("ANDROID_NATIVE_API_LEVEL", "21");
            boringssl_cmake.define("ANDROID_STL", "c++_shared");
        }

        "ios" => {
            for (ios_arch, params) in CMAKE_PARAMS_IOS {
                if *ios_arch == arch {
                    for (name, value) in *params {
                        boringssl_cmake.define(name, value);
                    }
                    break;
                }
            }

            let mut cflag = "-fembed-bitcode".to_string();
            if arch == "x86_64" {
                cflag.push_str(" -target x86_64-apple-ios-simulator");
            }
            boringssl_cmake.define("CMAKE_ASM_FLAGS", &cflag);
            boringssl_cmake.cflag(&cflag);
        }

        _ => (),
    };

    boringssl_cmake
}