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-<h2>ccache</h2>
-
-ccache is a compiler cache. It acts as a caching pre-processor to
-C/C++ compilers, using the -E compiler switch and a hash to detect
-when a compilation can be satisfied from cache. This often results in
-a 5 to 10 times speedup in common compilations.<p>
-
-The idea came from Erik Thiele wrote the original <a
-href="http://compilercache.sourceforge.net/">compilercache</a> program
-as a bourne shell script. ccache is a re-implementation of Erik's idea
-in C with more features and better performance.<p>
-
-<h2>New maintainer!</h2>
-
-I'm pleased to announce that <a href="http://joel.rosdahl.net/">Joel
-Rosedahl</a> has volunteered to take over maintainence of ccache. Joel
-has been working on enhancements to ccache for a while, and has
-considerable experience with other free software projects.
-
-<h2>Why bother?</h2>
-
-Why bother with a compiler cache? If you ever run "make clean; make"
-then you can probably benefit from ccache. It is very common for
-developers to do a clean build of a project for a whole host of
-reasons, and this throws away all the information from your previous
-compiles.<p>
-
-By using ccache you can get exactly the same effect as "make clean;
-make" but much faster. It also helps a lot when doing RPM builds,
-as RPM can make doing incremental builds tricky.<p>
-
-I put the effort into writing ccache for 2 reasons. The first is the
-Samba build farm
-(<a href="http://build.samba.org/">http://build.samba.org/</a>)
-which constantly does clean builds of Samba on about 30 machines after each
-CVS commit. On some of those machines the build took over an hour. By
-using ccache we get the same effect as clean builds but about 6 times
-faster.<p>
-
-The second reason is the autobuild system I used to run for
-Quantum. That system builds our whole Linux based OS from scratch
-after every CVS commit to catch compilation problems quickly. Using
-ccache those builds are much faster.
-
-<h2>Is it safe?</h2>
-
-Yes. The most important aspect of a compiler cache is to <b>always</b>
-produce exactly the same output that the real compiler would
-produce. The includes providing exactly the same object files and
-exactly the same compiler warnings that would be produced if you use
-the real compiler. The only way you should be able to tell that you
-are using ccache is the speed.<p>
-
-I have coded ccache very carefully to try to provide these guarantees.
-
-<h2>Features</h2>
-
-<ul>
-<li> keeps statistics on hits/misses
-<li> automatic cache size management
-<li> can cache compiles that generate warnings
-<li> easy installation
-<li> very low overhead
-<li> uses hard links where possible to avoid copies
-</ul>
-
-<h2>Documentation</h2>
-
-See the <a href="/ccache-man.html">manual page</a>
-
-<h2>Performance</h2>
-
-Here are some results for compiling Samba on my Linux laptop. I have
-also included the results of using Erik's compilercache program
-(version 1.0.10) for comparison.<p>
-
-<table border=1>
-<tr><th> </th> <th> ccache</th> <th> compilercache</th> </tr>
-<tr><td>normal </td> <td align=right>13m 4s </td><td align=right>13m 4s</td> </tr>
-<tr><td>uncached </td> <td align=right>13m 15s </td><td align=right>15m 41s</td> </tr>
-<tr><td>cached </td> <td align=right>2m 45s </td><td align=right>4m 26s</td> </tr>
-</table>
-
-<h2>How to use it</h2>
-
-You can use ccache in two ways. The first is just to prefix your
-compile commands with "ccache". For example, you could change the
-"CC=gcc" line in your Makefile to be "CC=ccache gcc".<p>
-
-Alternatively, you can create symbolic links from your compilers name
-to ccache. This allows you to use ccache without any changes to your
-build system.
-
-<h2>Download</h2>
-
-You can download the latest release from the <a
-href="http://samba.org/ftp/ccache/">download directory</a>.<p>
-
-For the bleeding edge, you can fetch ccache via git or
-rsync. To fetch via cvs use the following command:
-
-<pre>
- git clone git://git.samba.org/ccache.git
-</pre>
-
-To fetch via rsync use this command:
-
-<pre>
- rsync -Pavz samba.org::ftp/unpacked/ccache .
-</pre>
-
-<h2>Related projects</h2>
-
-Here are some related programs you may find interesting
-
-<ul>
-<li> <a href="http://distcc.samba.org/">distcc</a> - a distributed compilation system
-<li> <a href="http://cachecc1.sourceforge.net/">cachecc1</a> - a gcc specific cache
-<li> <a href="http://sourceforge.net/projects/gocache/">gocache</a> - a cross platform compiler cache
-</ul>
-<p>
-
-<h2>Mailing list</h2>
-
-<p>A <a href="http://lists.samba.org/mailman/listinfo/ccache/">mailing
-list</a> is available for discussion of ccache.
-
-
-<hr>
-<tiny>
-<a href="http://samba.org/~tridge/">Andrew Tridgell</a><br>
-<a href="mailto:bugs@ccache.samba.org">bugs@ccache.samba.org</a>
-</tiny>
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projects / thirdparty / ccache.git / commitdiff
