Hi All,
I been confused several time about qt-5 instructions. Would like to know why VLC never finds it when installed to /opt.

( If you have changed the bindir above, QT5BINDIR will need to be adjusted below. Be sure that the QT5BINDIR variable is defined in root's environment and as the root user:

QT5BINDIR=$QT5PREFIX/bin) ???

This is the confusion. I did the export and mkdir for /opt


Remove references to the build directory from installed library dependency (prl) files by running the following command as the root user:

find $QT5PREFIX/ -name \*.prl \
-exec sed -i -e '/^QMAKE_PRL_BUILD_DIR/d' {} \;

Install images and create the menu entries for installed applications. The QT5BINDIR variable is used here to point to the directory for the executable programs. If you have changed the bindir above, QT5BINDIR will need to be adjusted below. Be sure that the QT5BINDIR variable is defined in root's environment and as the root user:

QT5BINDIR=$QT5PREFIX/bin

install -v -dm755 /usr/share/pixmaps/ &&

install -v -Dm644 qttools/src/assistant/assistant/images/assistant-128.png \
/usr/share/pixmaps/assistant-qt5.png &&

install -v -Dm644 qttools/src/designer/src/designer/images/designer.png \
/usr/share/pixmaps/designer-qt5.png &&

install -v -Dm644 qttools/src/linguist/linguist/images/icons/linguist-128-32.png \
/usr/share/pixmaps/linguist-qt5.png &&

install -v -Dm644 qttools/src/qdbus/qdbusviewer/images/qdbusviewer-128.png \
/usr/share/pixmaps/qdbusviewer-qt5.png &&

install -dm755 /usr/share/applications &&

cat > /usr/share/applications/assistant-qt5.desktop << EOF
[Desktop Entry]
Name=Qt5 Assistant
Comment=Shows Qt5 documentation and examples
Exec=$QT5BINDIR/assistant
Icon=assistant-qt5.png
Terminal=false
Encoding=UTF-8
Type=Application
Categories=Qt;Development;Documentation;
EOF

cat > /usr/share/applications/designer-qt5.desktop << EOF
[Desktop Entry]
Name=Qt5 Designer
GenericName=Interface Designer
Comment=Design GUIs for Qt5 applications
Exec=$QT5BINDIR/designer
Icon=designer-qt5.png
MimeType=application/x-designer;
Terminal=false
Encoding=UTF-8
Type=Application
Categories=Qt;Development;
EOF

cat > /usr/share/applications/linguist-qt5.desktop << EOF
[Desktop Entry]
Name=Qt5 Linguist
Comment=Add translations to Qt5 applications
Exec=$QT5BINDIR/linguist
Icon=linguist-qt5.png
MimeType=text/vnd.trolltech.linguist;application/x-linguist;
Terminal=false
Encoding=UTF-8
Type=Application
Categories=Qt;Development;
EOF

cat > /usr/share/applications/qdbusviewer-qt5.desktop << EOF
[Desktop Entry]
Name=Qt5 QDbusViewer
GenericName=D-Bus Debugger
Comment=Debug D-Bus applications
Exec=$QT5BINDIR/qdbusviewer
Icon=qdbusviewer-qt5.png
Terminal=false
Encoding=UTF-8
Type=Application
Categories=Qt;Development;Debugger;
EOF

Some packages such as VLC-3.0.6 look for certain executables with a -qt5 suffix. Run the following command as the root user to create the necessary symlinks:

for file in moc uic rcc qmake lconvert lrelease lupdate; do
ln -sfrvn $QT5BINDIR/$file /usr/bin/$file-qt5
done
Thanks

maybe figure it out another time