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<title>Installing GCC: Testing</title>
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<h1 class="settitle">Installing GCC: Testing</h1>
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<a name="index-Testing-1"></a><a name="index-Installing-GCC_003a-Testing-2"></a><a name="index-Testsuite-3"></a>
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Before you install GCC, we encourage you to run the testsuites and to
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compare your results with results from a similar configuration that have
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been submitted to the
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<a href="http://gcc.gnu.org/ml/gcc-testresults/">gcc-testresults mailing list</a>.
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Some of these archived results are linked from the build status lists
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at <a href="http://gcc.gnu.org/buildstat.html">http://gcc.gnu.org/buildstat.html</a>, although not everyone who
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reports a successful build runs the testsuites and submits the results.
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This step is optional and may require you to download additional software,
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but it can give you confidence in your new GCC installation or point out
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problems before you install and start using your new GCC.
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<p>First, you must have <a href="download.html">downloaded the testsuites</a>.
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These are part of the full distribution, but if you downloaded the
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“core” compiler plus any front ends, you must download the testsuites
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separately.
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<p>Second, you must have the testing tools installed. This includes
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<a href="http://www.gnu.org/software/dejagnu/">DejaGnu</a>, Tcl, and Expect;
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the DejaGnu site has links to these.
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<p>If the directories where <samp><span class="command">runtest</span></samp> and <samp><span class="command">expect</span></samp> were
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installed are not in the <samp><span class="env">PATH</span></samp>, you may need to set the following
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environment variables appropriately, as in the following example (which
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assumes that DejaGnu has been installed under <samp><span class="file">/usr/local</span></samp>):
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<pre class="smallexample"> TCL_LIBRARY = /usr/local/share/tcl8.0
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DEJAGNULIBS = /usr/local/share/dejagnu
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</pre>
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<p>(On systems such as Cygwin, these paths are required to be actual
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paths, not mounts or links; presumably this is due to some lack of
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portability in the DejaGnu code.)
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<p>Finally, you can run the testsuite (which may take a long time):
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<pre class="smallexample"> cd <var>objdir</var>; make -k check
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</pre>
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<p>This will test various components of GCC, such as compiler
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front ends and runtime libraries. While running the testsuite, DejaGnu
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might emit some harmless messages resembling
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‘<samp><span class="samp">WARNING: Couldn't find the global config file.</span></samp>’ or
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‘<samp><span class="samp">WARNING: Couldn't find tool init file</span></samp>’ that can be ignored.
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<p>If you are testing a cross-compiler, you may want to run the testsuite
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on a simulator as described at <a href="http://gcc.gnu.org/simtest-howto.html">http://gcc.gnu.org/simtest-howto.html</a>.
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<h3 class="section"><a name="TOC0"></a>How can you run the testsuite on selected tests?</h3>
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<p>In order to run sets of tests selectively, there are targets
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‘<samp><span class="samp">make check-gcc</span></samp>’ and language specific ‘<samp><span class="samp">make check-c</span></samp>’,
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‘<samp><span class="samp">make check-c++</span></samp>’, ‘<samp><span class="samp">make check-fortran</span></samp>’, ‘<samp><span class="samp">make check-java</span></samp>’,
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‘<samp><span class="samp">make check-ada</span></samp>’, ‘<samp><span class="samp">make check-objc</span></samp>’, ‘<samp><span class="samp">make check-obj-c++</span></samp>’,
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‘<samp><span class="samp">make check-lto</span></samp>’
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in the <samp><span class="file">gcc</span></samp> subdirectory of the object directory. You can also
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just run ‘<samp><span class="samp">make check</span></samp>’ in a subdirectory of the object directory.
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<p>A more selective way to just run all <samp><span class="command">gcc</span></samp> execute tests in the
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testsuite is to use
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<pre class="smallexample"> make check-gcc RUNTESTFLAGS="execute.exp <var>other-options</var>"
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</pre>
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<p>Likewise, in order to run only the <samp><span class="command">g++</span></samp> “old-deja” tests in
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the testsuite with filenames matching ‘<samp><span class="samp">9805*</span></samp>’, you would use
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<pre class="smallexample"> make check-g++ RUNTESTFLAGS="old-deja.exp=9805* <var>other-options</var>"
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</pre>
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<p>The <samp><span class="file">*.exp</span></samp> files are located in the testsuite directories of the GCC
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source, the most important ones being <samp><span class="file">compile.exp</span></samp>,
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<samp><span class="file">execute.exp</span></samp>, <samp><span class="file">dg.exp</span></samp> and <samp><span class="file">old-deja.exp</span></samp>.
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To get a list of the possible <samp><span class="file">*.exp</span></samp> files, pipe the
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output of ‘<samp><span class="samp">make check</span></samp>’ into a file and look at the
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‘<samp><span class="samp">Running ... .exp</span></samp>’ lines.
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<h3 class="section"><a name="TOC1"></a>Passing options and running multiple testsuites</h3>
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<p>You can pass multiple options to the testsuite using the
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‘<samp><span class="samp">--target_board</span></samp>’ option of DejaGNU, either passed as part of
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‘<samp><span class="samp">RUNTESTFLAGS</span></samp>’, or directly to <samp><span class="command">runtest</span></samp> if you prefer to
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work outside the makefiles. For example,
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<pre class="smallexample"> make check-g++ RUNTESTFLAGS="--target_board=unix/-O3/-fmerge-constants"
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</pre>
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<p>will run the standard <samp><span class="command">g++</span></samp> testsuites (“unix” is the target name
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for a standard native testsuite situation), passing
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‘<samp><span class="samp">-O3 -fmerge-constants</span></samp>’ to the compiler on every test, i.e.,
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slashes separate options.
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<p>You can run the testsuites multiple times using combinations of options
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with a syntax similar to the brace expansion of popular shells:
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<pre class="smallexample"> ..."--target_board=arm-sim\{-mhard-float,-msoft-float\}\{-O1,-O2,-O3,\}"
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</pre>
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<p>(Note the empty option caused by the trailing comma in the final group.)
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The following will run each testsuite eight times using the ‘<samp><span class="samp">arm-sim</span></samp>’
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target, as if you had specified all possible combinations yourself:
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<pre class="smallexample"> --target_board='arm-sim/-mhard-float/-O1 \
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arm-sim/-mhard-float/-O2 \
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arm-sim/-mhard-float/-O3 \
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arm-sim/-mhard-float \
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arm-sim/-msoft-float/-O1 \
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arm-sim/-msoft-float/-O2 \
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arm-sim/-msoft-float/-O3 \
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arm-sim/-msoft-float'
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</pre>
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<p>They can be combined as many times as you wish, in arbitrary ways. This
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list:
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<pre class="smallexample"> ..."--target_board=unix/-Wextra\{-O3,-fno-strength\}\{-fomit-frame,\}"
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</pre>
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<p>will generate four combinations, all involving ‘<samp><span class="samp">-Wextra</span></samp>’.
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<p>The disadvantage to this method is that the testsuites are run in serial,
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which is a waste on multiprocessor systems. For users with GNU Make and
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a shell which performs brace expansion, you can run the testsuites in
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parallel by having the shell perform the combinations and <samp><span class="command">make</span></samp>
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do the parallel runs. Instead of using ‘<samp><span class="samp">--target_board</span></samp>’, use a
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special makefile target:
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<pre class="smallexample"> make -j<var>N</var> check-<var>testsuite</var>//<var>test-target</var>/<var>option1</var>/<var>option2</var>/...
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</pre>
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<p>For example,
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<pre class="smallexample"> make -j3 check-gcc//sh-hms-sim/{-m1,-m2,-m3,-m3e,-m4}/{,-nofpu}
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</pre>
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<p>will run three concurrent “make-gcc” testsuites, eventually testing all
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ten combinations as described above. Note that this is currently only
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supported in the <samp><span class="file">gcc</span></samp> subdirectory. (To see how this works, try
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typing <samp><span class="command">echo</span></samp> before the example given here.)
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<h3 class="section"><a name="TOC2"></a>Additional testing for Java Class Libraries</h3>
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<p>The Java runtime tests can be executed via ‘<samp><span class="samp">make check</span></samp>’
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in the <samp><var>target</var><span class="file">/libjava/testsuite</span></samp> directory in
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the build tree.
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<p>The <a href="http://sourceware.org/mauve/">Mauve Project</a> provides
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a suite of tests for the Java Class Libraries. This suite can be run
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as part of libgcj testing by placing the Mauve tree within the libjava
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testsuite at <samp><span class="file">libjava/testsuite/libjava.mauve/mauve</span></samp>, or by
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specifying the location of that tree when invoking ‘<samp><span class="samp">make</span></samp>’, as in
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‘<samp><span class="samp">make MAUVEDIR=~/mauve check</span></samp>’.
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<h3 class="section"><a name="TOC3"></a>How to interpret test results</h3>
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<p>The result of running the testsuite are various <samp><span class="file">*.sum</span></samp> and <samp><span class="file">*.log</span></samp>
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files in the testsuite subdirectories. The <samp><span class="file">*.log</span></samp> files contain a
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detailed log of the compiler invocations and the corresponding
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results, the <samp><span class="file">*.sum</span></samp> files summarize the results. These summaries
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contain status codes for all tests:
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<ul>
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<li>PASS: the test passed as expected
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<li>XPASS: the test unexpectedly passed
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<li>FAIL: the test unexpectedly failed
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<li>XFAIL: the test failed as expected
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<li>UNSUPPORTED: the test is not supported on this platform
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<li>ERROR: the testsuite detected an error
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<li>WARNING: the testsuite detected a possible problem
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</ul>
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<p>It is normal for some tests to report unexpected failures. At the
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current time the testing harness does not allow fine grained control
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over whether or not a test is expected to fail. This problem should
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be fixed in future releases.
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<h3 class="section"><a name="TOC4"></a>Submitting test results</h3>
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<p>If you want to report the results to the GCC project, use the
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<samp><span class="file">contrib/test_summary</span></samp> shell script. Start it in the <var>objdir</var> with
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<pre class="smallexample"> <var>srcdir</var>/contrib/test_summary -p your_commentary.txt \
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-m gcc-testresults@gcc.gnu.org |sh
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</pre>
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<p>This script uses the <samp><span class="command">Mail</span></samp> program to send the results, so
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make sure it is in your <samp><span class="env">PATH</span></samp>. The file <samp><span class="file">your_commentary.txt</span></samp> is
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prepended to the testsuite summary and should contain any special
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remarks you have on your results or your build environment. Please
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do not edit the testsuite result block or the subject line, as these
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messages may be automatically processed.
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<p><hr />
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<p><a href="./index.html">Return to the GCC Installation page</a>
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