Basically, I followed this post to build qt5, after running configure commands, it prompted:
WARNING: QDOC will not be compiled, probably because libclang could not be located. This means theat you cannot build the Qt ducomentation.
...
On Windows, you must set LLVN_INSTALL_DIR to the installation path.
so I setup a environment variable LLVM_INSTALL_DIR following this page(I got LLVM here), when I enter set LLVM_INSTALL_DIR in the command promp, it printed outLLVM_INSTALL_DIR=D:\LLVM. So I am assured that LLVM has been properly installed. Who can help me taking this warning away(My IDE is Visual Studio 2019)?
