qt-alternate-5.15.10

export QT5PREFIX=/opt/qt5

mkdir -pv /opt/qt-5.15.10
ln -sfnv qt-5.15.10 /opt/qt5

Installation of qt5

First, apply a patch to pull in the fixes curated by kde for those modules which are required by packages mentioned in this book:

patch -Np1 -i ../qt-everywhere-opensource-src-5.15.10-kf5-1.patch

The patch is supposed to be used in a git repository, because the behavior of the configure command below is changed in this case. It is enough to create a .git directory in the qmake directory, where the configure script is run:

mkdir -pv qtbase/.git

At this point we want to set up skipping most components. Do that with:

ls -Fd qt* | grep / | sed 's/^/-skip /;s@/@@' > tempconf &&
sed -i -r '/base|tools|x11extras|svg|declarative|wayland/d' tempconf

Now, install qt5 by running the following commands:

./configure -prefix $QT5PREFIX   \
            -sysconfdir /etc/xdg \
            -confirm-license     \
            -opensource          \
            -dbus-linked         \
            -openssl-linked      \
            -system-harfbuzz     \
            -system-sqlite       \
            -nomake examples     \
            -no-rpath            \
            -journald            \
            $(cat tempconf)      \
            &&
make

This package does not come with a test suite.

Now, as the root user:

make install

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-3.0.18 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

cat > /etc/sudoers.d/qt << "EOF"
Defaults env_keep += QT5DIR
EOF

cat > /etc/profile.d/qt5.sh << "EOF"
# Begin /etc/profile.d/qt5.sh

QT5DIR=/usr
export QT5DIR

# End /etc/profile.d/qt5.sh
EOF

cat >> /etc/ld.so.conf << EOF
# Begin Qt addition

/opt/qt5/lib

# End Qt addition
EOF

ldconfig

cat > /etc/profile.d/qt5.sh << "EOF"
# Begin /etc/profile.d/qt5.sh

QT5DIR=/opt/qt5

pathappend $QT5DIR/bin           PATH
pathappend $QT5DIR/lib/pkgconfig PKG_CONFIG_PATH

export QT5DIR

# End /etc/profile.d/qt5.sh
EOF