用Visual Studio 2008成功编译GMSH 2.5

因为项目，需要在WINDOWS下面编译GMSH(一种开源的有限元网格剖分工具（MESH) http://geuz.org/gmsh/)。

帮助说明如下：

Build Gmsh using CMake's graphical user interface

* Launch CMake and fill-in the two top input fields (telling where the
  Gmsh source directory is located and where you want the Gmsh binary
  to be created).

* Click on "Add entry" and define the variable CMAKE_PREFIX_PATH, of
  type "PATH", pointing to the location(s) of any external package(s)
  (FLTK, BLAS/LAPACK, etc.) installed in non-standard directories. 

  (If you are using our pre-compiled "gmsh dependencies" package
  (http://geuz.org/gmsh/bin/Windows/gmsh-dep-msvc2008-release.zip)
  with Visual Studio on Windows simply point CMAKE_PREFIX_PATH to the
  "gmsh-dep" directory.)

* Click on "Configure" and choose your compiler (e.g. Visual Studio).

* Optionally change some configuration options (re-run "Configure"
  every time you change some options).

* Once you are happy with all the configuration options, click on
  "Generate".

* Go to the build directory and build Gmsh using your chosen compiler.

  (With Visual Studio double-click on "gmsh.sln". If you are using our
  pre-compiled "gmsh dependencies" package you must use the "Release"
  or "RelWithDebInfo" build type.)

看完后，丈二和尚摸不到头脑。

不管怎么样，这个软件用到了QT4，所以先把WINDOWS下面的QT环境装好了。这里，我使用的是visual studio 2008+ Qt4.7 sdk for windows(Qt_SDK_Win_offline_v1_1_4_en.exe)+vs插件（qt-vs-addin-1.1.9.exe）的QT环境。

然后，去GMSH的FTP上下载gmsh-dep-msvc2008-release.zip 这个包里面含有GMSH所用到的一些第三方库，如FLTK,GSL。这些库如果自己安装好了，就不用下这个，但是在windows下面安装不是太方便，所以GMSH提供了windows下编译好的库。将包里面“gmsh-dep"目录提取出来。

其次安装CMAKE。直接去CMAKE的官网上下载绿色版的CMAKE 2.86(http://www.cmake.org/files/v2.8/cmake-2.8.6-win32-x86.zip)

到了这里，所有需要的”材料“就都准备好了，当然，GMSH的源代码是早就准备好的！

下面，运行CMAKE，安装上面的说明一步步来，就OK了！

我再解释一下好了：

* Launch CMake and fill-in the two top input fields (telling where the
  Gmsh source directory is located and where you want the Gmsh binary
  to be created).

运行CMake，填上GMSH的源代码路径、生成路径。

* Click on "Add entry" and define the variable CMAKE_PREFIX_PATH, of
  type "PATH", pointing to the location(s) of any external package(s)
  (FLTK, BLAS/LAPACK, etc.) installed in non-standard directories. 

点”Add entry"添加“PATH”类型的变量CMAKE_PREFIX_PATH， 指向上面说到的gmsh-dep目录

* Click on "Configure" and choose your compiler (e.g. Visual Studio).

点Configure，选择编译器。我的是visual studio 9 2008.

* Optionally change some configuration options (re-run "Configure"
  every time you change some options).

会成才许多变量，如果有不合适的可以修改。我没有修改。

* Once you are happy with all the configuration options, click on
  "Generate".

点GENERATE。另外，这步不能打开VS2008，不如会报错。

* Go to the build directory and build Gmsh using your chosen compiler.

最后，点生成目录下的.sln文件，转到VS2008中生成可执行文件。注意，只能生成release类型的哦！好像是因为我没有安装那些第三方的软件，直接用的人家给的库的原因。

等一会就生成完了。可是我的可执行文件比gmsh官方给出的大了1M（一共才6M多），不知道为什么。

大功告成，回去睡觉咯~