GTK+ >= 2.4 [gtk2]
GLib >= 2.4 [gtk2]
JPEG >= 6b
OpenMofif >= 2.2.3 [motif]
LibPNG >= 1.2.5
LibUngif >= 4.1.0
Ncurses >= 5.4
Pkgconfig >= 0.9.0 [gtk2]
TIFF >= 3.6.0
Xorg >= 7.0 [gtk2,motif]
ZLib >= 1.2.1
