重新编译使用CMake的旧项目的问题处理

Error:CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
Configuration failed.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
Configuration failed.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
Configuration failed.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
Configuration failed.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
Configuration failed.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
Configuration failed.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
Configuration failed.
FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':app'.
> executing external native build for cmake /Users/taro/gitcode/android/XLink_Gateway_NDK/app/CMakeLists.txt

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

发生这个问题的原因是由于没有配置 cmake 的编译程序。该配置是通过 gradle 文件进行配置的。编译系统为 Mac OSX。

先说项目编译的前提。由于项目是通过 CMake 进行编译的，所以 CMake 是必须的。实际上原来的系统中已经安装了 CMake ，但是在 AS make project 时依然提示未安装 CMake，需要按以下方式进行排查。

1. 首先通过 SDK Manager 确认是否已安装了 CMake,如果没有则需要安装

2. 确认自己的系统中存在 cmake 程序和 ninja 程序

➜  bin git:(master) ✗ where cmake
/usr/local/bin/cmake
➜  bin git:(master) ✗ where ninja
/usr/local/bin/ninja

如果发现没有安装 ninja ，在 Mac OSX 中可以通过 homebrew 进行安装

//安装过程时间有点长，需要耐心等待，不需要
brew install ninja

如果 homebrew 安装时发现安装 ninja 失败（这边出现的情况时在下载文件时失败，该下载地址通过浏览器访问确实是无效的），建议确认一下是否需要进行 homebrew 的更新

brew update

如果无法访问 /usr/local/bin文件夹，没有权限，这是由于 Mac OSX 系统后面的安装限制，请参考文章进行修改。mac 10.13 /usr/local 权限限制。

注意：即使开了权限 homebrew 也可能是 update 失败，此时可以尝试先执行 brew upgrade再执行brew update，有可能是版本太旧了

3. 确认 gradle 中的 cmake 配置信息

android{
	defaultConfig{
		externalNativeBuild{
			cmake{
				arguments "-DANDROID_STL=c++_static",
				//这里使用的地址就是上面查询到的 ninja 的地址
				 "-DCMAKE_MAKE_PROGRAM=/usr/local/bin/ninja"
			}
		}
	}
}

4. 如果编译时提示 cmakeLists 文件的错误，请注意是否为 ANDROID_STL配置错误的原因

原项目使用 -DANDROID_STL=gnustl_static，但是高版本的 NDK 不支持，需要修改为 -DANDROID_STL=c++_static。

5. 如果编译时发现存在一些 ABI 系统架构不支持的情况，需要根据提示在 gradle 文件中屏蔽相应的 ABI

在原项目中默认编译的 ABI 包括

include 'x86','x86_64','armeabi-v7a','arm64-v8a','armeabi','mips','mips64'

但是实际上编译时提示后三个都不支持，此时屏蔽掉

include 'x86','x86_64','armeabi-v7a','arm64-v8a'//,'armeabi','mips','mips64'

备注：

1. 原项目使用的 NDK 版本是 15，在使用旧版本原编译环境的 NDK 版本编译时，不需要修改配置文件，ABI 架构也是全部都是支持的。所以能不随便去改 NDK 版本（或者说编译环境）千万不要去动，否则：编译环境一变化，同事两行泪
2. 根据另一个同事反馈，其实也不用专门去安装ninja，在 AS 帮我们安装的 cmake 里已经有了 ninja 的程序，只需要把该地址补充即可（但是同事是使用旧版本的 NDK 编译，原项目并不需要添加编译程序的路径，但是重新配置编译环境时就变得需要了，不确定问题原因是什么。）

-DCMAKE_MAKE_PROGRAM=~/Library/Android/sdk/cmake/3.10.2.4988404/bin/ninja

附NDK旧版本下载链接