GNU Compiler Collection (GCC) Internals
5.3.2.1 Scripts Used by `configure'
`configure' uses some other scripts to help in its work:
- The standard GNU `config.sub' and `config.guess'
files, kept in the top level directory, are used. FIXME: when is the
`config.guess' file in the `gcc' directory (that just calls
the top level one) used?
- The file `config.gcc' is used to handle configuration
specific to the particular build, host or target machine. (In
general, this should only be used for features that cannot reasonably
be tested in Autoconf feature tests.) See section The `config.gcc' File, for details of the contents of this file.
- Each language subdirectory has a file
`language/config-lang.in' that is used for
front-end-specific configuration. See section The Front End `config-lang.in' File, for details of this file.
- A helper script `configure.frag' is used as part of
creating the output of `configure'.
