New in version 3.5.
Enable/Disable output of compile commands during generation.
This option is implemented only by Makefile Generators and the Ninja. It is ignored on other generators.
Makefile Generators
Borland Makefiles
MSYS Makefiles
MinGW Makefiles
NMake Makefiles
NMake Makefiles JOM
Unix Makefiles
Watcom WMake
打开 vs 的 console
可先手动打开，然后使用process hacker查看程序启动的命令，就可以找到如下命令，可从控制台打开vs 的 console，不用手动打开：
cmd /k "C:\Program Files\Microsoft Visual Studio\xxxx\yyyy\VC\Auxiliary\Build\vcvars64.bat"
在打开的vs cosole中输入：
cmake .. -G "NMake Makefiles" -DCMAKE_EXPORT_COMPILE_COMMANDS=1
生成compile_commands.json