Ramana Radhakrishnan wrote:
> In addition I'd like this documented in changes.html for each of the
> release branches.
Richard Earnshaw wrote:
> However, it does need to be release-noted.
Would the following htdocs patch be OK with you? Feel free to suggest
a more appropriate wording ...
Bye,
Ulrich
Index: gcc-4.6/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.6/changes.html,v
retrieving revision 1.141
diff -u -p -r1.141 changes.html
--- gcc-4.6/changes.html 12 Jun 2012 10:43:41 -0000 1.141
+++ gcc-4.6/changes.html 10 Aug 2012 13:40:57 -0000
@@ -68,6 +68,12 @@
default by <code>-Wall</code> flag and
<code>-Wunused-but-set-parameter</code>
by <code>-Wall -Wextra</code> flags.</li>
+ <li>In GCC version 4.6.4 the default alignment of vector types on ARM EABI
+ targets has been changed to 8 bytes (for types larger than 8 bytes in
size),
+ to comply with the AAPCS. This is an ABI change that affects e.g. layout
of
+ structures having a member of vector type. Code using such types may be
+ incompatible with binary objects built with older versions of GCC.</li>
+
<li><p>Support for a number of older systems and recently
unmaintained or untested target ports of GCC has been declared
obsolete in GCC 4.6. Unless there is activity to revive them, the
Index: gcc-4.7/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.7/changes.html,v
retrieving revision 1.123
diff -u -p -r1.123 changes.html
--- gcc-4.7/changes.html 23 Jul 2012 05:58:05 -0000 1.123
+++ gcc-4.7/changes.html 10 Aug 2012 13:40:57 -0000
@@ -121,6 +121,12 @@
different GCC versions and with C++98/C++03 code compiled with any version.
</li>
+ <li>In GCC version 4.7.2 the default alignment of vector types on ARM EABI
+ targets has been changed to 8 bytes (for types larger than 8 bytes in
size),
+ to comply with the AAPCS. This is an ABI change that affects e.g. layout
of
+ structures having a member of vector type. Code using such types may be
+ incompatible with binary objects built with older versions of GCC.</li>
+
<li>More information on porting to GCC 4.7 from previous versions
of GCC can be found in
the <a href="http://gcc.gnu.org/gcc-4.7/porting_to.html";>porting
Index: gcc-4.8/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.8/changes.html,v
retrieving revision 1.9
diff -u -p -r1.9 changes.html
--- gcc-4.8/changes.html 31 Jul 2012 12:13:01 -0000 1.9
+++ gcc-4.8/changes.html 10 Aug 2012 13:40:57 -0000
@@ -24,6 +24,12 @@ more information about requirements to b
<p>The G++ namespace association extension, <code>__attribute
((strong))</code>,
has been deprecated. Inline namespaces should be used instead.</p>
+<p>The default alignment of vector types on ARM EABI targets has been changed
+to 8 bytes (for types larger than 8 bytes in size), to comply with the AAPCS.
+This is an ABI change that affects e.g. layout of structures having a member
+of vector type. Code using such types may be incompatible with binary objects
+built with older versions of GCC.</p>
+
<h2>General Optimizer Improvements</h2>
<ul>
--
Dr. Ulrich Weigand
GNU Toolchain for Linux on System z and Cell BE
ulrich.weig...@de.ibm.com
