Hello.
Following patch documents changes in PGO and GCOV which were done for upcoming
GCC 7.1.
Thanks for feedback,
Martin
--- /tmp/wwwdocs/htdocs/gcc-7/changes.html 2017-01-25 11:10:56.000000000 +0100
+++ htdocs/gcc-7/changes.html 2017-01-25 14:48:56.257587082 +0100
@@ -630,6 +630,18 @@
<li>GCC has gained an internal unit-testing framework, allowing for
more detailed testing of its implementation details.</li>
+
+ <li>Profile-guided optimization (PGO) instrumentation, as well as test coverage (GCOV),
+ can newly instrument constructors (functions marks with <code>__attribute__((constructor)))</code>,
+ destructors and C++ constructors (and destructors) of classes that are used
+ as a type of a global variable.
+ </li>
+ <li>A new option <code>-fprofile-update=atomic</code> prevents creation of corrupted
+ profiles created during instrumentation run (<code>-fprofile=generate</code>)
+ of an application. Downside of the option is a speed penalty. Providing
+ <code>-pthread</code> on command line would result in selection of atomic
+ profile updating (when supports by a target).
+ </li>
</ul>
<!-- <h2><a name="7.1">GCC 7.1</a></h2>
