Autoconf, Automake, and Libtool: autoheader process

| ## C.2 autoheader `autoheader` runs `m4` over ``configure.in'`, but with key macros defined differently than when `autoconf` is executed, such that suitable `cpp` definitions are output to ``config.h.in'`.
    user input files    optional input     process          output files
    ================    ==============     =======          ============

                        aclocal.m4 - - - - - - - .
                        (acconfig.h) - - - -.    |
                                            V    V
                                         .----------,
    configure.in ----------------------->|autoheader|----> config.h.in
                                         `----------'

This document was generated by Gary V. Vaughan on February, 8 2006 using texi2html