When building Qt with Mingw-w64 the following command sequence does not work:

cd build../qt5/configure ...make install

The build results in the following linker error here:

g++ Wl,-s -shared -mthreads -Wl,-subsystem,windows -Wl,-out-implib,C:/Libraries/Qt/qt5Build/qtbase/lib/libQt5Core.a -o ../../lib/Qt5Core.dll object_script.Qt5Core.Release -LC:/Libraries/OpenCascade/3rdPartyMingw64/freetype-2.6.3-mingw-64/bin -lmpr -lnetapi32 -luserenv .obj/release/Qt5Core_resource_res.o -lversion -lws2_32 -lkernel32 -luser32 -lshell32 -luuid -lole32 -ladvapi32 -lwinmm -lz -LC:/Libraries/Qt/qt5Build/qtbase/lib C:/Libraries/Qt/qt5Build/qtbase/lib/libqtpcre2.a -LC:/Libraries/OpenCascade/3rdPartyMingw64/freetype-2.6.3-mingw-64/bin
g++.exe: error: C:/Libraries/Qt/qt5Build/qtbase/lib/libqtpcre2.a: No such file or directory

Instead (as the output of configure says) these commands have to be used:

cd build

../qt5/configure ...

make

make install

The reason seems to be that some "install" targets do not depend on "all", so that installing does not trigger compilation. Therefore compilation has to be triggered "manually" before.

Even though it is of course possible to use "make" before "make install", it is annoying, because it is somehow non-standard. Wouldn't it be worth it improving that? (I have spent quite a lot of hours to figure out the reason and get Qt to compile correctly.)