Beyond Linux® From Scratch (systemd Edition) - Version 12.3

Chapter 25. Graphical Environment Libraries

FLTK-1.4.2

Introduction to FLTK

FLTK (pronounced "fulltick") is a cross-platform C++ GUI toolkit. FLTK provides modern GUI functionality and supports 3D graphics via OpenGL and its built-in GLUT emulation libraries used for creating graphical user interfaces for applications.

This package is known to build and work properly using an LFS 12.3 platform.

Package Information

Additional Downloads

FLTK Dependencies

Required

Xorg Libraries

Recommended

hicolor-icon-theme-0.18, libjpeg-turbo-3.0.1, and libpng-1.6.46

Optional

alsa-lib-1.2.13, desktop-file-utils-0.28, Doxygen-1.13.2, GLU-9.0.3, Mesa-24.3.4, and texlive-20240312 (or install-tl-unx)

Installation of FLTK

[Note]

Note

The tar extraction directory is fltk-1.4.2 and not fltk-1.4.2-source as indicated by the tarball name.

Install FLTK by running the following commands: 

sed -i -e '/cat./d' documentation/Makefile       &&

./configure --prefix=/usr    \
            --enable-shared  &&
make

If you wish to create the API documentation, issue: 

make -C documentation html

The tests for the package are interactive. To execute the tests, run test/unittests. In addition, there are 70 other executable test programs in the test directory that can be run individually.

Now, install the package and remove unneeded static libraries. As the root user: 

make docdir=/usr/share/doc/fltk-1.4.2 install &&
rm -vf /usr/lib/libfltk*.a

If desired, install some example games built as a part of the tests, extra documentation and example programs. As the root user: 

make -C test          docdir=/usr/share/doc/fltk-1.4.2 install-linux &&
make -C documentation docdir=/usr/share/doc/fltk-1.4.2 install-linux

If you downloaded the optional html documentation, install it as the root user: 

tar -C /usr/share/doc/fltk-1.4.2 --strip-components=4 -xf ../fltk-1.4.2-docs-html.tar.gz

Command Explanations

sed ... documentation/Makefile: Avoid installing pages in /usr/share/man/cat*.

Contents

Installed Programs: blocks, checkers, fltk-config, fluid, and sudoku
Installed Libraries: libfltk.so, libfltk_forms.so, libfltk_gl.so, and libfltk_images.so
Installed Directories: /usr/include/FL and /usr/share/doc/fltk-1.4.2

Short Descriptions

blocks

is a FLTK-based block elimination game

checkers

is a FLTK-based version of the game of checkers

fltk-config

is a utility script that can be used to get information about the current version of FLTK that is installed on the system

fluid

is an interactive GUI designer for FLTK

sudoku

is an implementation of the popular Sudoku game

libfltk.so

contains functions that provide an API to implement graphical user interfaces