VS2019 编译 x64 QT5.9.5

1.将源码解压到磁盘根目录，

安装Qt的时候没有装到磁盘根目录，导致路径太长了，会莫名的报找不到文件或者ninja subcommand failed.

2.安装好

* Perl version 5.12 or later   [http://www.activestate.com/activeperl/]

* Python version 2.7 or later  [http://www.activestate.com/activepython/]

* Ruby version 1.9.3 or later  [http://rubyinstaller.org/]

3打开

执行

Open a command prompt.

     Ensure that the following tools can be found in the path:

     * Supported compiler (Visual Studio 2012 or later,

        MinGW-builds gcc 4.9 or later)

     * Perl version 5.12 or later   [http://www.activestate.com/activeperl/]

     * Python version 2.7 or later  [http://www.activestate.com/activepython/]

     * Ruby version 1.9.3 or later  [http://rubyinstaller.org/]

     cd <path>\<source_package>

     configure -prefix %CD%\qtbase <license> -nomake tests

     nmake // jom // mingw32-make

Some relevant configure options (see configure -help):

 -release              Compile and link Qt with debugging turned off.

 -debug                Compile and link Qt with debugging turned on.

 -nomake tests         Disable building of tests to speed up compilation

 -nomake examples      Disable building of examples to speed up compilation

 -confirm-license