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| <a name="The-config_002ebuild_003b-config_002ehost_003b-and-config_002egcc-Files"></a> |
| <h4 class="subsubsection">6.3.2.2 The <samp>config.build</samp>; <samp>config.host</samp>; and <samp>config.gcc</samp> Files</h4> |
| |
| <p>The <samp>config.build</samp> file contains specific rules for particular systems |
| which GCC is built on. This should be used as rarely as possible, as the |
| behavior of the build system can always be detected by autoconf. |
| </p> |
| <p>The <samp>config.host</samp> file contains specific rules for particular systems |
| which GCC will run on. This is rarely needed. |
| </p> |
| <p>The <samp>config.gcc</samp> file contains specific rules for particular systems |
| which GCC will generate code for. This is usually needed. |
| </p> |
| <p>Each file has a list of the shell variables it sets, with descriptions, at the |
| top of the file. |
| </p> |
| <p>FIXME: document the contents of these files, and what variables should |
| be set to control build, host and target configuration. |
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