astsa implements a small subset of the ast library for other ast standalone commands and libraries using X/Open interfaces. To get better performance and functionality, consider using any of the full-featured ast-* packages at http://www.research.att.com/sw/download/ astsa.omk is an old make makefile that builds the headers and objects and defines these variables for use in other makefiles ASTSA_OPTIMIZE ``-O'' by default The astsa files may be combined in a single directory with other ast standalone packages.