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8 <sect1 id="ch-preps-abouttestsuites">
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11 <title>About the Test Suites</title>
13 <para>Most packages provide a test suite. Running the test suite for a
14 newly built package is a good idea because it can provide a <quote>sanity
15 check</quote> indicating that everything compiled correctly. A test suite
16 that passes its set of checks usually proves that the package is
17 functioning as the developer intended. It does not, however, guarantee
18 that the package is totally bug free.</para>
20 <para>Some test suites are more important than others. For example,
21 the test suites for the core toolchain packages—GCC, Binutils, and
22 Glibc—are of the utmost importance due to their central role in a
23 properly functioning system. The test suites for GCC and Glibc can
24 take a very long time to complete, especially on slower hardware, but
25 are strongly recommended.</para>
28 <para>Experience has shown that there is little to be gained from running
29 the test suites in <xref linkend="chapter-temporary-tools"/>. There can be
30 no escaping the fact that the host system always exerts some influence on
31 the tests in that chapter, often causing inexplicable failures. Because
32 the tools built in <xref linkend="chapter-temporary-tools"/> are temporary
33 and eventually discarded, we do not recommend running the test suites in
34 <xref linkend="chapter-temporary-tools"/> for the average reader. The
35 instructions for running those test suites are provided for the benefit of
36 testers and developers, but they are strictly optional.</para>
39 <para>A common issue with running the test suites for Binutils and GCC
40 is running out of pseudo terminals (PTYs). This can result in a high
41 number of failing tests. This may happen for several reasons, but the
42 most likely cause is that the host system does not have the
43 <systemitem class="filesystem">devpts</systemitem> file system set up
44 correctly. This issue is discussed in greater detail at
45 <ulink url="&lfs-root;lfs/faq.html#no-ptys"/>.</para>
47 <para>Sometimes package test suites will fail, but for reasons which the
48 developers are aware of and have deemed non-critical. Consult the logs located
49 at <ulink url="&test-results;"/> to verify whether or not these failures are
50 expected. This site is valid for all tests throughout this book.</para>