Windows环境下使用CMake编译libfdk-aac的指南

# source code: git clone https://android.googlesource.com/platform/external/aac
cmake_minimum_required ( VERSION 2.8 )
 
set ( FDK_AAC_SOURCE_DIR D:/Study/C++/tools/fdk-aac-2.0.1 ) #这里根据自己的路径修改

if (CMAKE_SYSTEM_NAME STREQUAL Android )
    if ( NOT CMAKE_SYSTEM_PROCESSOR )
        set ( CMAKE_SYSTEM_PROCESSOR    armeabi-v7a )
    endif ()
    if ( NOT CMAKE_SYSTEM_VERSION )
        set ( CMAKE_SYSTEM_VERSION      8 )
    endif ()
    if ( NOT NDK_TOOLCHAIN_VERSION)
        set ( NDK_TOOLCHAIN_VERSION     4.8 )
    endif ()
 
    set ( ANDROID_NDK_ROOT $ENV{ANDROID_NDK_ROOT} )
 
    find_path ( TOOLCHAIN_ROOT bin PATHS ${ANDROID_NDK_ROOT}/toolchains/arm-linux-androideabi-${NDK_TOOLCHAIN_VERSION}/prebuilt/* )
 
    include ( CMakeForceCompiler )
 
    find_program ( CMAKE_C_COMPILER   arm-linux-androideabi-gcc PATHS ${TOOLCHAIN_ROOT}/bin )
    find_program ( CMAKE_CXX_COMPILER arm-linux-androideabi-g++ PATHS ${TOOLCHAIN_ROOT}/bin )
    find_program ( CMAKE_AR           arm-linux-androideabi-ar  PATHS ${TOOLCHAIN_ROOT}/bin )
 
    cmake_force_c_compiler      ( ${CMAKE_C_COMPILER} GNU )
    cmake_force_cxx_compiler    ( ${CMAKE_CXX_COMPILER} GNU )
 
    set ( CMAKE_SYSROOT         ${ANDROID_NDK_ROOT}/platforms/android-${CMAKE_SYSTEM_VERSION}/arch-arm  CACHE PATH "" )