Update buildinstructions_qt5.txt

buildinstructions_qt5.txt

@@ -1,5 +1,6 @@
 https://stackoverflow.com/questions/14932315/how-to-compile-qt-5-under-windows-or-linux-32-or-64-bit-static-or-dynamic-on-v
 https://stackoverflow.com/questions/15826893/building-qt5-with-visual-studio-2012-visual-studio-2013-and-integrating-with/15893226#15893226
+https://stackoverflow.com/questions/51278611/how-to-make-qt-static-build-run-without-install-vc-redist-x64-exe
 
 If something breaks, read this instead:
 https://github.com/qbittorrent/qBittorrent/wiki/Compiling-with-MSVC-2019-(static-linkage)
@@ -11,6 +12,7 @@ REQUIRED:
 -MSVC2019
 -Windows 10 SDK
 -jom
+For actually building a full-fledged Qt install, grab the other necessary requirements listed here: https://doc.qt.io/qt-5/windows-requirements.html
 
 With everything in the path, open MSVC2019 prompt (VS2019 Command Prompt of choice; I'm using x64_x86 Cross Tools Command Prompt for VS 2019):
 $mkdir C:\Qt5
@@ -20,19 +22,17 @@ $cd qt5
 $git checkout <branch> (ex. 5.15.2, whatever)
 $perl ./init-repository
 
-Edit qmakespec (qtbase\mkspecs\common\msvc-desktop.conf)
-QMAKE_CFLAGS_RELEASE    = $$QMAKE_CFLAGS_OPTIMIZE -MT
-QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += $$QMAKE_CFLAGS_OPTIMIZE -Zi -MT
-QMAKE_CFLAGS_DEBUG      = -Zi -MTd
-
-Set env vars in prompt
+Set env vars in prompt:
 $set QTDIR=C:\Qt5\qt5
 $set PATH=C:\Qt5\qt5\qtbase\bin;%PATH%
 
-Build it
-$configure -release -opensource -platform win32-msvc -static -nomake examples -nomake tests
+Build it:
+$configure -release -opensource -platform win32-msvc -static -static-runtime -nomake examples -nomake tests
+
+If you want to build just tools (i.e. Linguist), make sure to -skip any top level folder other than qttools and qtbase:
+$configure -release -opensource -platform win32-msvc -static -static-runtime -nomake examples -nomake tests -skip qtquickcontrols -skip qtwebchannel -skip qtactiveqt -skip qtandroidextras -skip qtdeclarative -skip qtimageformats -skip qtmacextras -skip qtserialport -skip qtx11extras -skip qtxmlpatterns -skip qtconnectivity -skip qtdoc -skip qtgraphicaleffects -skip qtlocation -skip qtmultimedia -skip qtsensors -skip qttranslations -skip qtwayland -skip qtwebchannel -skip qtwebengine -skip qtwebsockets -skip qtwinextras
 
-Either
+In any case, after configuration:
 $nmake
 or
 $jom -j[number of jobs]