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R=gri, rsc, r, bradfitz, dsymonds
CC=golang-dev
https://golang.org/cl/5532093
102 lines
3.7 KiB
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102 lines
3.7 KiB
HTML
<!--{
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"Title": "Contributing to the gccgo frontend"
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}-->
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<h2>Introduction</h2>
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<p>
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These are some notes on contributing to the <code>gccgo</code>
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frontend for GCC. For information on contributing to parts of Go other
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than <code>gccgo</code>, see <a href="contribute.html">Contributing to
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the Go project</a>. For information on building <code>gccgo</code>
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for yourself, see <a href="gccgo_install.html">Setting up and using
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gccgo</a>.
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</p>
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<h2>Legal Prerequisites</h2>
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<p>
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You must follow the <a href="contribute.html#copyright">Go copyright
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rules.</a>
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</p>
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<h2>Code</h2>
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<p>
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The source code for the <code>gccgo</code> frontend may be found at
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<a href="http://code.google.com/p/gofrontend">http://code.google.com/p/gofrontend</a>.
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Changes made to that project are routinely merged into the source code
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hosted at <code>gcc.gnu.org</code>. The <code>gofrontend</code>
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project includes only the Go frontend proper. These are the files
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which in the <code>gcc</code> sources may be found in the
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directories <code>gcc/go</code> and <code>libgo</code>.
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The <code>gcc</code> sources also include a copy of
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the <code>test</code> directory
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from <a href="http://code.google.com/p/go">the main Go repository</a>.
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<p>
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The frontend is written in C++ and as such the GNU coding standards do
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not entirely apply; in writing code for the frontend, follow the
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formatting of the surrounding code. Although the frontend is
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currently closely tied to the rest of the <code>gcc</code> codebase,
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we plan to make it more independent. Any new code that uses other
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parts of <code>gcc</code> should be placed in an appropriate file,
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such as <code>gogo-tree.cc</code>. Eventually
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all <code>gcc</code>-specific code should migrate to
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a <code>gcc-interface</code> subdirectory.
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</p>
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<p>
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The run-time library for <code>gccgo</code> is mostly the same as the
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library in <a href="http://code.google.com/p/go">the main Go
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repository</a>. The library code in the Go repository is periodically
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copied into the <code>gofrontend</code> and the <code>gcc</code>
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repositories. Accordingly, most library changes should be made in the
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main Go repository. Changes to the few <code>gccgo</code>-specific
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parts of the library should follow the process described here.
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The <code>gccgo</code>-specific parts of the library are everything in
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the <code>libgo</code> directory except for the <code>libgo/go</code>
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subdirectory.
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</p>
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<h2>Testing</h2>
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<p>
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All patches must be tested. There are two test suites. A patch that
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introduces new failures is not acceptable.
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</p>
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<p>
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To run the compiler test suite, run <code>make check-go</code> in the
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<code>gcc</code> subdirectory of your build directory. This will run
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various tests underneath <code>gcc/testsuite/go.*</code>. This
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includes a copy of the tests in the main Go repository, which are run
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using the DejaGNU script found in
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in <code>gcc/testsuite/go.test/go-test.exp</code>. Many of the
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compiler tests may be run without the Go library, but some do require
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the library to built first.
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</p>
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<p>
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To run the library test suite, run <code>make
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check-target-libgo</code> in the top level of your build directory.
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</p>
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<p>
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Most new tests should be submitted to the main Go repository for
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copying into the <code>gccgo</code> repository. If there is a need
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for specific tests for <code>gccgo</code>, they should go in
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the <code>gcc/testsuite/go.go-torture</code>
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or <code>gcc/testsuite/go.dg</code> directories in
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the <code>gcc.gnu.org</code> repository.
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</p>
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<h2>Submitting Changes</h2>
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<p>
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Changes to the Go frontend should follow the same process as for the
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main Go repository, only for the <code>gofrontend</code> project
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rather than the <code>go</code> project. Those changes will then be
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merged into the <code>gcc</code> sources.
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</p>
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