This patch describes some user visible changes that were
added to gcc 5.
Ok to commit?
-Andi
Index: htdocs/gcc-5/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-5/changes.html,v
retrieving revision 1.25
diff -u -r1.25 changes.html
--- htdocs/gcc-5/changes.html 14 Nov 2014 21:32:32 -0000 1.25
+++ htdocs/gcc-5/changes.html 16 Nov 2014 20:03:07 -0000
@@ -154,6 +154,11 @@
about qualifiers on pointers being discarded via a new warning option
<code>-Wno-discarded-qualifiers</code>.</li>
<li>The C front end now generates more precise caret diagnostics.</li>
+ <li>The -pg option now only affects the current file in a LTO build.</li>
+ <li>A new no_reorder attribute has been added, that prevents reordering
+ of a specific symbol against other such symbols or inline assembler.
+ This is a more focussed alternative to
+ <code>-fno-toplevel-reorder</code>.
</ul>
<h3 id="cxx">C++</h3>
@@ -295,6 +300,17 @@
</ul>
+<h3 id="x86">IA-32/x86-64</h3>
+ <ul>
+ <li>The new <code>-mrecord-mcount</code> option for <code>-pg</code>
+ generates a Linux kernel style table of pointers to mcount or
+ __fentry__ calls at the beginning of functions. The new
+ <code>-mnop-mcount</code> option in addition also generates nops in
+ place of the __fentry__ or mcount call, so that a call per function
+ can be later patched in. This can be used for low overhead tracing or
+ hot code patching.</li>
+ </ul>
+
<h2 id="os">Operating Systems</h2>
<h3 id="dragonfly">DragonFly BSD</h3>
@@ -304,7 +320,11 @@
</ul>
<!-- h2>Documentation improvements</h2-->
-<!-- h2>Other significant improvements</h2 -->
-
+<h2>Other significant improvements</h2>
+ <h3 id="gcc-ar"></h3>
+ <ul>
+ <li>The <code>gcc-ar, gcc-nm, gcc-ranlib</code> wrappers now
+ understand a <code>-B</code> option to set the compiler to use.</li>
+ </ul>
</body>
</html>
