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-<!--{
-	"Title": "Contributing to the gccgo frontend"
-}-->
-
-<h2>Introduction</h2>
-
-<p>
-These are some notes on contributing to the gccgo frontend for GCC.
-For information on contributing to parts of Go other than gccgo,
-see <a href="/doc/contribute.html">Contributing to the Go project</a>.  For
-information on building gccgo for yourself,
-see <a href="/doc/gccgo_install.html">Setting up and using gccgo</a>.
-For more of the gritty details on the process of doing development
-with the gccgo frontend,
-see <a href="https://go.googlesource.com/gofrontend/+/master/HACKING">the
-file HACKING</a> in the gofrontend repository.
-</p>
-
-<h2>Legal Prerequisites</h2>
-
-<p>
-You must follow the <a href="/doc/contribute.html#copyright">Go copyright
-rules</a> for all changes to the gccgo frontend and the associated
-libgo library.  Code that is part of GCC rather than gccgo must follow
-the general <a href="https://gcc.gnu.org/contribute.html">GCC
-contribution rules</a>.
-</p>
-
-<h2>Code</h2>
-
-<p>
-The master sources for the gccgo frontend may be found at
-<a href="https://go.googlesource.com/gofrontend">https://go.googlesource.com/gofrontend</a>.
-They are mirrored
-at <a href="https://github.com/golang/gofrontend">https://github.com/golang/gofrontend</a>.
-The master sources are not buildable by themselves, but only in
-conjunction with GCC (in the future, other compilers may be
-supported).  Changes made to the gccgo frontend are also applied to
-the GCC source code repository hosted at <code>gcc.gnu.org</code>.  In
-the <code>gofrontend</code> repository, the <code>go</code> directory
-is mirrored to the <code>gcc/go/gofrontend</code> directory in the GCC
-repository, and the <code>gofrontend</code> <code>libgo</code>
-directory is mirrored to the GCC <code>libgo</code> directory.  In
-addition, the <code>test</code> directory
-from <a href="//go.googlesource.com/go">the main Go repository</a>
-is mirrored to the <code>gcc/testsuite/go.test/test</code> directory
-in the GCC repository.
-</p>
-
-<p>
-Changes to these directories always flow from the master sources to
-the GCC repository.  The files should never be changed in the GCC
-repository except by changing them in the master sources and mirroring
-them.
-</p>
-
-<p>
-The gccgo frontend is written in C++.
-It follows the GNU and GCC coding standards for C++.
-In writing code for the frontend, follow the formatting of the
-surrounding code.
-Almost all GCC-specific code is not in the frontend proper and is
-instead in the GCC sources in the <code>gcc/go</code> directory.
-</p>
-
-<p>
-The run-time library for gccgo is mostly the same as the library
-in <a href="//go.googlesource.com/go">the main Go repository</a>.
-The library code in the Go repository is periodically merged into
-the <code>libgo/go</code> directory of the <code>gofrontend</code> and
-then the GCC repositories, using the shell
-script <code>libgo/merge.sh</code>.  Accordingly, most library changes
-should be made in the main Go repository.  The files outside
-of <code>libgo/go</code> are gccgo-specific; that said, some of the
-files in <code>libgo/runtime</code> are based on files
-in <code>src/runtime</code> in the main Go repository.
-</p>
-
-<h2>Testing</h2>
-
-<p>
-All patches must be tested.  A patch that introduces new failures is
-not acceptable.
-</p>
-
-<p>
-To run the gccgo test suite, run <code>make check-go</code> in your
-build directory.  This will run various tests
-under <code>gcc/testsuite/go.*</code> and will also run
-the <code>libgo</code> testsuite.  This copy of the tests from the
-main Go repository is run using the DejaGNU script found
-in <code>gcc/testsuite/go.test/go-test.exp</code>.
-</p>
-
-<p>
-Most new tests should be submitted to the main Go repository for later
-mirroring into the GCC repository.  If there is a need for specific
-tests for gccgo, they should go in
-the <code>gcc/testsuite/go.go-torture</code>
-or <code>gcc/testsuite/go.dg</code> directories in the GCC repository.
-</p>
-
-<h2>Submitting Changes</h2>
-
-<p>
-Changes to the Go frontend should follow the same process as for the
-main Go repository, only for the <code>gofrontend</code> project and
-the <code>gofrontend-dev@googlegroups.com</code> mailing list
-rather than the <code>go</code> project and the
-<code>golang-dev@googlegroups.com</code> mailing list.  Those changes
-will then be merged into the GCC sources.
-</p>