Binary package “libgtkglextmm-x11-1.2-dev” in ubuntu jammy

C++ bindings for GtkGLExt (Development files)

 GtkGLExtmm is a C++ wrapper for GtkGLExt. C++ programmers can use it to
 write GTK+-based OpenGL applications using Gtkmm 2.
 .
 This package contains the development files.