As discussed in #2602, make GTK+3 the default of the build system, leading up to the eventual removal of GTK+2 support.
The `--enable-gtk3` configuration option is replaced with `--enable-gtk2`. If `--enable-gtk2` is specified, the GTK+2 development libraries/headers must be available via `pkg-config` or else configuration will fail. If `--enable-gtk2` is _not_ specified, the GTK+3 development libraries/headers must be available or else configuration will fail. It intentionally does not fall back to GTK+2 automatically. You can view, comment on, or merge this pull request online at:
https://github.com/geany/geany/pull/2610
-- Commit Summary --
* Make GTK3 build default, and GTK2 build optional
-- File Changes --
M configure.ac (28)
-- Patch Links --
https://github.com/geany/geany/pull/2610.patch https://github.com/geany/geany/pull/2610.diff