I have the development libraries for both GTK2 and GTK3 installed on my system.  The ./configure script only offers a --with-gtk flag, and it detects GTK2, whilst I would prefer to build the software with GTK3, if this is possible.  How can I tell ./configure to use GTK3 instead of GTK2?
Configuring a build with GTK3?
configure;gtk3
The APIs for versions 2 and 3 of Gtk+ are different, so software written for version 2 can't simply be rebuilt with version 3. If ./configure only finds version 2 it's probable that version 3 isn't supported.I take it./configure --helponly lists --with-gtk, and nothing like --with-gtk3; ./configure scripts which support both versions of Gtk+ generally use two different options, one for each version.You could search around to see if a Gtk+ 3 patch is available; there may be a distribution which has adapted the software to version 3...