Install Boost library on windows

Steps

Make sure gcc is the latest, otherwise some unexpected errors might occur.

On Windows platform, you can install msys2, and after update it has all the latest mingw64 tool chain for building use, which is convenient.
Download tar ball from official website.
Decompress and run bootstrap.bat, it generates b2.exe

For linux, run bootstrap.sh instead of bootstrap.bat
```
.\bootstrap.bat
```
Run b2.exe with the following options
```
.\b2.exe install \
	--build-type=complete \
	threading=multi \
	link=shared \
	address-model=64 \
	toolset=gcc \
	--prefix="D:\procs\boost_1_79_0"
```
Note that gcc must have been set already before this, and prefix is where to copy the headers and libs to.

For the day I ran this, gcc I used is from msys2and its version is 12.0, the boost library is 1.79.0.
After build with out errors, it should say the following
```
...updated 18043 targets...
```

Install Boost library on Linux

Steps

Make sure gcc is installed
Download corresponding tar ball from official website.

We need to pay attention, the gcc version should be somewhat applicable to this boost library version. Otherwise some strange errors come up with compiling.
After decompress the tar ball, generate b2 by using bootstrap.sh
```
./bootstrap.sh  --with-libraries=all --with-toolset=gcc
```

Create a directory for building (not to contaminate current source tree structure)

# Give it a name you want
# For example, here abs path is: /home/pyrad/swap/boost_1_69_0/PyradBuild
mkdir PyradBuild

Use b2 to compile, specify a build directory in current folder for generating build files (cache, scripts, …)
```
./b2 toolset=gcc --build-dir=/home/pyrad/swap/boost_1_69_0/PyradBuild
```
After it finishes, the following message will appear,
```
The Boost C++ Libraries were successfully built!

The following directory should be added to compiler include paths:

    /home/pyrad/procs/boost_1_72_0

The following directory should be added to linker library paths:

    /home/pyrad/procs/boost_1_72_0/stage/lib
```
Note

如果在上面的命令中指定了选项： --build-type=complete, 但没有指定--layout=<versioned|tagged|system>，那么编译的时候会报错，原因是在linux中，如果指定了--build-type=complete，那么就要加上--layout=versioned。但这样做会导致生成的lib目录中的库文件（.so，.a）会带有编译器版本，boost library版本等信息的字符串，如下
```
...
libboost_math_c99-gcc9-mt-d-x64-1_69.so
libboost_random-gcc9-mt-d-x64-1_69.so
libboost_atomic-gcc9-mt-d-x64-1_69.so
...
```
这样就会导致cmake的时候抱怨使用find_package不能找到boost library，实际上cmake是试图寻找以下这样的名字
```
...
libboost_math_c99.so
libboost_random.so
libboost_atomic.so
...
```
在linux中，--layout这个选项的默认值是system，即产生的库文件名称不带有编译器版本boost库版本等信息（如上）。

Install the libraries and header files to a path you specify

./b2 install --prefix=<SOME_USER_PATH>

因为没有指定--layout=versioned，所以生成的目录结构如下

boost_1_69_0/
	|---include/
	|     |---boost/
	|          |---<all *.hpp headers>
	|          |---<all_header_filer_folders>
	|			  
	|---lib/
	     |---<all *.so files>
	     |---<all *.a files>

Reference

MinGW编译boost库