Get drive letter/host install location of MSYS from terminal or Qmake?

Question

I have a QT Qmake project which has a lot of blocks like this for MSYS compatibility:

# VTK
win32 {
  INCLUDEPATH += c:/msys64/mingw64/include/vtk-$${VTKVERSION}
  LIBS += -Lc:/msys64/mingw64/lib
}
else {
  INCLUDEPATH += $$VTKINCPATH
  LIBS += -L$$VTKLIBPATH
}

This has worked fine up until now, but now I have a problem. Due to limited space, I have installed MSYS on an external D drive, which breaks all of these such include types.

Is there a programmatic way using either QMake or a command from within MSYS2 to get the drive letter that MSYS is currently installed in?

Maybe I could stitch it together if PACMAN offers a drive path. If I try putting in the package name with -Ql, it just gives me the path relative to MSYS root, sadly.

Answer 1

The tool cygpath can do this.

The command I use is:

cygpath -m /

Which in my case will print out:

D:/msys64/