I am trying to use a xmlpatterns-private. I could get the headers by adding
Qt Code: 
  1. qt += xmlpatterns-private.
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But when I compile it gives the error:

Qt Code: 
  1. undefined reference to `QPatternist::XsdSchemaResolver::~XsdSchemaResolver()'
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So it supposes means that header was found but the lib didn't install my Qt environment. How to install or adding such a private module into Qt instead of compiling the whole Qt source? I'm guessing that I shall pull the xmlpatterns source and compile it, put it into some folder... In other words how to perform the installation of the private module.

What I tried:

1. Download Qt 5.13 source code
2. Open qtxmlpatterns.pro in QtCreator
3. Add
Qt Code: 
  1. CONFIG+=xml-schema
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in qtxmlpatterns.pro
4. Build
5. Go to build folder and run
Qt Code: 
  1. mingw32-make install
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6. Rebuild my project, but gives the same error...