腾讯mars，在windows上编译

本文记录了我在学习mars源码时，遇到的一些问题及解决方法。

准备工作

1. 安装cmake，(备注，如果下载1.3.0版本，需要cmake编译出vs的工程文件。使用1.3.0之前的版本，则无需下载cmake)
2. 安装python 2.7.x，（备注同上）
3. 使用git下载源代码，windows上的git下载地址https://gitforwindows.org/。当然，也可以从git网站上直接下载zip包

编译:

1. 在命令行，cd到mars/samples/Windows子目录，运行cmake

C:\temp\mars-1.3.0\mars\samples\Windows>cmake .
-- Building for: Visual Studio 15 2017
-- Selecting Windows SDK version 10.0.17134.0 to target Windows 6.1.7601.
-- The C compiler identification is MSVC 19.14.26433.0
-- The CXX compiler identification is MSVC 19.14.26433.0
-- Check for working C compiler: C:/Program Files/Microsoft Visual Studio/2017/C
ommunity/VC/Tools/MSVC/14.14.26428/bin/Hostx86/x86/cl.exe
-- Check for working C compiler: C:/Program Files/Microsoft Visual Studio/2017/C
ommunity/VC/Tools/MSVC/14.14.26428/bin/Hostx86/x86/cl.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: C:/Program Files/Microsoft Visual Studio/2017
/Community/VC/Tools/MSVC/14.14.26428/bin/Hostx86/x86/cl.exe
-- Check for working CXX compiler: C:/Program Files/Microsoft Visual Studio/2017
/Community/VC/Tools/MSVC/14.14.26428/bin/Hostx86/x86/cl.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config xlog====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config app====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config baseevent====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config mars-boost====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config comm====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config sdt====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config stn====================
-- Configuring done
-- Generating done
-- Build files have been written to: C:/temp/mars-1.3.0/mars/samples/Windows

2. 使用vs2017，打开C:/temp/mars-1.3.0/mars/samples/Windows下的sample.sln解决方案

3. 使用vs2017编译，发生错误：
   fatal error C1083: 无法打开包括文件: “thr/threads.h”: No such file or directory
   分析错误原因。这个头文件在vs2015的版本中存在，但是由于这个线程实现不完美，在vs2017中被移除了。因此，如果需要不修改源码，就直接编译，需要使用vs2015。

4. 使用 -G 选项，生成对应的vs2015解决方案。注意，我的系统是win32，使用-G “Visual Studio 14 2015”。如果是64是系统，应该使用-G “Visual Studio 14 2015 Win64”

c:\temp\mars-1.3.0\mars\samples\Windows>cmake -G "Visual Studio 14 2015" .
-- The C compiler identification is MSVC 19.0.23026.0
-- The CXX compiler identification is MSVC 19.0.23026.0
-- Check for working C compiler: C:/Program Files/Microsoft Visual Studio 14.0/V
C/bin/cl.exe
-- Check for working C compiler: C:/Program Files/Microsoft Visual Studio 14.0/V
C/bin/cl.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: C:/Program Files/Microsoft Visual Studio 14.0
/VC/bin/cl.exe
-- Check for working CXX compiler: C:/Program Files/Microsoft Visual Studio 14.0
/VC/bin/cl.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config xlog====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config app====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config baseevent====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config mars-boost====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config comm====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config sdt====================
-- CMAKE_INSTALL_PREFIX=C:/temp/mars-1.3.0/mars/samples/Windows
-- ==============config stn====================
-- Configuring done
-- Generating done
-- Build files have been written to: C:/temp/mars-1.3.0/mars/samples/Windows

5. error C2899: 不能在模板声明之外使用类型名称
   typename cannot be used outside a template declaration
   直接删除多余的typename，则可以编译成功。