Utility programs used to build the FLTK library. Contents: cmap.cxx generate the built-in colormap (src/fl_cmap.h) code_snapshot.cxx PDF documentation tool to generate a png image from a Doxygen `@code` segment with international characters Build System: The util directory includes CMake support. Utilities are built automatically during the build process when needed. Some utilities are only built when specific features are enabled: - The colormap generator `bin/cmap` is only built manually if needed to generate a new colormap (src/fl_cmap.h). See instructions in util/cmap.cxx. - The PDF documentation helper is only built when FLTK_BUILD_PDF_DOCS=ON. To add a new utility, edit util/CMakeLists.txt and follow the existing patterns for conditional building and target configuration.