CHANGES IN FLTK 1.4.0 RELEASED: ??? ?? ???? New features and extensions - ... New configuration options (ABI version) - FLTK's ABI version can be configured with configure and CMake. See documentation in README.abi-version.txt. 1.4.0 ABI FEATURES - None. 1.4.0 is a new ABI version (breaking 1.3.x ABI). Other improvements - ... Bug fixes - ...