public inbox for
help / color / mirror / Atom feed
* gcc-wwwdocs branch master updated. 611da69f7782376d2737fe683f5db7ea7a5cdb31
@ 2020-11-26 11:32 Jonathan Wakely
  0 siblings, 0 replies; only message in thread
From: Jonathan Wakely @ 2020-11-26 11:32 UTC (permalink / raw)
  To: gcc-cvs-wwwdocs

This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gcc-wwwdocs".

The branch, master has been updated
       via  611da69f7782376d2737fe683f5db7ea7a5cdb31 (commit)
      from  752e29ec094f9df75b158eb40db44265345b1a3f (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
commit 611da69f7782376d2737fe683f5db7ea7a5cdb31
Author: Jonathan Wakely <>
Date:   Thu Nov 26 11:31:02 2020 +0000

    Document libstdc++ header dependency changes
    Also explain how to replace dynamic exception specifications.

diff --git a/htdocs/gcc-11/porting_to.html b/htdocs/gcc-11/porting_to.html
index 1e27064c..91cd0b4d 100644
--- a/htdocs/gcc-11/porting_to.html
+++ b/htdocs/gcc-11/porting_to.html
@@ -77,10 +77,43 @@ equality comparisons, not ordered comparisons.
 GCC 11 defaults to C++17 which does not allow dynamic exception specifications.
+An exception specification like <code>throw(std::runtime_error)</code> should
+be removed or replaced with <code>noexcept(false)</code> (meaning the function
+can throw any type of exception).
+An exception specification like <code>throw()</code> can be replaced with
+<code>noexcept</code> or <code>noexcept(true)</code> (meaning the function
+does not throw exceptions).
 <h3 id="Comparison-Functions">Comparison Functions</h3>
 GCC 11 now enforces that comparison objects be invocable as const.
+<h3 id="header-dep-changes">Header dependency changes</h3>
+<p>Some C++ Standard Library headers have been changed to no longer include
+other headers that they do need to depend on.
+As such, C++ programs that used standard library components without
+including the right headers will no longer compiler.
+The following headers are used less widely in libstdc++ and may need to
+be included explicitly by programs that were incorrectly relying on them
+being included implicitly by other headers:
+<li> <code>&lt;limits&gt;</code>
+  (e.g. for <code>std::numeric_limits</code>)
+<li> <code>&lt;memory&gt;</code>
+  (e.g. for <code>std::unique_ptr</code>, <code>std::shared_ptr</code> etc.)
+<li> <code>&lt;utility&gt;</code>
+  (for <code>std::pair</code>, <code>std::tuple_size</code>,
+  <code>std::index_sequence</code> etc.)
 <h2 id="fortran">Fortran language issues</h2>


Summary of changes:
 htdocs/gcc-11/porting_to.html | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)


^ permalink raw reply	[flat|nested] only message in thread

only message in thread, other threads:[~2020-11-26 11:32 UTC | newest]

Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-11-26 11:32 gcc-wwwdocs branch master updated. 611da69f7782376d2737fe683f5db7ea7a5cdb31 Jonathan Wakely

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).