On 3/22/23 06:42, Jonathan Wakely wrote:
We don't currently have a single page where you can find out when
support for a given standard became non-experimental (you have to look
through all the gcc-X/changes.html pages to find it). I think we should
have that info on the cxx-status.html page. This adds it for C++17, and
we can do the same for C++20 when we declare that stable.
OK for wwwdocs?
OK.
-- >8 --
Also link to library docs for C++20 and add a cxx2a anchor which is used
by some old links.
---
htdocs/projects/cxx-status.html | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/htdocs/projects/cxx-status.html b/htdocs/projects/cxx-status.html
index b5362bba..7f59e5a2 100644
--- a/htdocs/projects/cxx-status.html
+++ b/htdocs/projects/cxx-status.html
@@ -402,10 +402,12 @@
-->
</table>
- <h2 id="cxx20">C++20 Support in GCC</h2>
+ <h2 id="cxx20"><a id="cxx2a">C++20 Support in GCC</h2>
<p>GCC has experimental support for the latest revision of the C++
- standard, which was published in 2020.</p>
+ standard, which was published in 2020.
+ The status of C++20 library features is described in
+ <a
href="https://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2020";>the library
documentation</a>.</p>
<p>C++20 features are available since GCC 8. To enable C++20
support, add the command-line parameter <code>-std=c++20</code>
@@ -988,14 +990,16 @@
<p>GCC has almost full support for the previous revision of the C++
standard, which was published in 2017.
- Some library features are missing or incomplete, as described in
+ The status of C++17 library features is described in
<a
href="https://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2017";>the
library documentation</a>.
</p>
- <p>C++17 features are available since GCC 5. This mode is the default
- in GCC 11; it can be explicitly selected with the <code>-std=c++17</code>
- command-line flag, or <code>-std=gnu++17</code> to enable GNU extensions
- as well.</p>
+ <p>C++17 mode is the default since GCC 11; it can be explicitly selected
+ with the <code>-std=c++17</code> command-line flag, or
+ <code>-std=gnu++17</code> to enable GNU extensions as well.
+ Some C++17 features are available since GCC 5, but support was experimental
+ and the ABI of C++17 features was not stable until GCC 9.
+ </p>
<h2>C++17 Language Features</h2>
@@ -1315,7 +1319,7 @@
<p>GCC has full support for the of the 2014 C++ standard.</p>
- <p>This mode is the default in GCC 6.1 up until GCC 10 (including); it can
+ <p>This mode is the default in GCC 6.1 up until GCC 10 (inclusive); it can
be explicitly selected with the <code>-std=c++14</code> command-line flag,
or <code>-std=gnu++14</code> to enable GNU extensions as well.</p>
