On 13/08/20 16:37 +0100, Jonathan Wakely wrote:
These headers do not offer any tangible benefit compared to the default
c_global version. They are not actively maintained meaning that they
have bugs which have already been fixed for the c_global headers.
This change adds a warning if they are used, and requires a new
--enable-cheaders-obsolete option to allow their use. Unless we receive
reports from users who rely on the c_std headers they should be removed
at some point in future.
libstdc++-v3/ChangeLog:
* acinclude.m4 (GLIBCXX_ENABLE_CHEADERS): Warn if the c_std
option is used and fail unless --enable-cheaders-obsolete is
also used.
* configure: Regenerate.
Tested powerpc64le-linux. Committed to trunk.
And this is the change for the release notes. Pushed to wwwdocs.
commit fb20e4dc5242fb245187dd0294f316b5136c8c7d
Author: Jonathan Wakely <jwak...@redhat.com>
Date: Thu Aug 13 16:37:58 2020 +0100
Libstdc++ cheaders=c_std configuration is deprecated
diff --git a/htdocs/gcc-11/changes.html b/htdocs/gcc-11/changes.html
index 1975c6c0..8526b87a 100644
--- a/htdocs/gcc-11/changes.html
+++ b/htdocs/gcc-11/changes.html
@@ -46,6 +46,11 @@ a work-in-progress.</p>
<li><code>-gsplit-dwarf</code> no longer enables debug info generation
on its own but requires a separate <code>-g</code> for this.</li>
+
+ <li>The libstdc++ configure option <tt>--enable-cheaders=c_std</tt>
+ is deprecated and will be removed in a future release. It should be
+ possible to use <tt>--enable-cheaders=c_global</tt> (the default)
+ with no change in behaviour. </li>
</ul>
