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-rw-r--r--docs/buildroot.html31
1 files changed, 28 insertions, 3 deletions
diff --git a/docs/buildroot.html b/docs/buildroot.html
index f471962ad..b6cf578bd 100644
--- a/docs/buildroot.html
+++ b/docs/buildroot.html
@@ -29,6 +29,7 @@
<li><a href="#buildroot_innards">How Buildroot works</a></li>
<li><a href="#using_toolchain">Using the uClibc toolchain outside Buildroot</a></li>
<li><a href="#external_toolchain">Use an external toolchain</a></li>
+ <li><a href="#ccache-support">Using <code>ccache</code> in Buildroot</li>
<li><a href="#downloaded_packages">Location of downloaded packages</a></li>
<li><a href="#add_packages">Adding new packages to Buildroot</a></li>
<li><a href="#board_support">Creating your own board support</a></li>
@@ -523,9 +524,8 @@ $(ZLIB_DIR)/libz.a: $(ZLIB_DIR)/.configured
<ul>
<li><b>toolchain</b> (in the <code>toolchain/</code> directory) contains
the Makefiles and associated files for all software related to the
- cross-compilation toolchain: <code>binutils</code>, <code>ccache</code>,
- <code>gcc</code>, <code>gdb</code>, <code>kernel-headers</code> and
- <code>uClibc</code>.</li>
+ cross-compilation toolchain: <code>binutils</code>, <code>gcc</code>,
+ <code>gdb</code>, <code>kernel-headers</code> and <code>uClibc</code>.</li>
<li><b>package</b> (in the <code>package/</code> directory) contains the
Makefiles and associated files for all user-space tools that Buildroot
@@ -681,6 +681,31 @@ endif
Build options -&gt; Toolchain and header file location</code> options.
This could be useful if the toolchain must be shared with other users.</p>
+ <h2 id="ccache-support">Using <code>ccache</code> in Buildroot</h2>
+
+ <p><a href="http://ccache.samba.org">ccache</a> is a compiler
+ cache. It stores the object files resulting from each compilation
+ process, and is able to skip future compilation of the same source
+ file (with same compiler and same arguments) by using the
+ pre-existing object files. When doing almost identical builds from
+ scratch a number of times, it can nicely speed up the build
+ process.</p>
+
+ <p><code>ccache</code> support is integrated in Buildroot. You
+ just have to enable <code>Enable compiler cache</code>
+ in <code>Build options</code>. This will automatically build
+ <code>ccache</code> and use it for every host and target
+ compilation.</p>
+
+ <p>The cache is located
+ in <code>$HOME/.buildroot-ccache</code>. It is stored outside of
+ Buildroot output directory so that it can be shared by separate
+ Buildroot builds. If you want to get rid of the cache, simply
+ remove this directory.</p>
+
+ <p>You can get statistics on the cache (its size, number of hits,
+ misses, etc.) by running <code>make ccache-stats</code>.</p>
+
<h2 id="downloaded_packages">Location of downloaded packages</h2>
<p>It might be useful to know that the various tarballs that are