Force using gtk3 when building software in systems with both gtk2 and gtk3

Do you have both gtk2 che gtk3 installed on your Slackware box and sometimes gtk3 based programs compilation fails because the building script can't find the right version of the library? If the answer to the question is "Yes" maybe you can find a solution to your problem using the following trick. Create a new file /usr/local/bin/wx-config-gtk3  and put into it

WX3CONFIG=$(find /usr -type f -name gtk2-unicode-3.0)

if [ "${WX3CONFIG}" != "" ]; then
    rm -f /tmp/wx-config 2>/dev/null >/dev/null && \
    ln -s ${WX3CONFIG} /tmp/wx-config && \
    export PATH=/tmp/:$PATH
    echo "GTK3: wx-config found at ${WX3CONFIG}"
    echo ""
else
    echo "GTK3: wx-config not found"
    echo ""
fi

From now on every time you fall into the "wrong gtk version" problem you can execute .  /usr/local/bin/wx-config-gtk3  in the same shell you are using to compile programs.