libstdc++: Disable volatile-qualified std::bind for C++20

LWG 2487 added a precondition to std::bind for C++17, making
volatile-qualified uses undefined. We still support it, but with a
deprecated warning.

P1065R2 made it explicitly ill-formed for C++20, so we should no longer
accept it as deprecated. This implements that change.

libstdc++-v3/ChangeLog:

	* doc/xml/manual/evolution.xml: Document std::bind API
	changes.
	* doc/xml/manual/intro.xml: Document LWG 2487 status.
	* doc/xml/manual/using.xml: Clarify default value of
	_GLIBCXX_USE_DEPRECATED.
	* doc/html/*: Regenerate.
	* include/std/functional (_Bind::operator()(Args&&...) volatile)
	(_Bind::operator()(Args&&...) const volatile)
	(_Bind_result::operator()(Args&&...) volatile)
	(_Bind_result::operator()(Args&&...) const volatile): Replace
	with deleted overload for C++20 and later.
	* testsuite/20_util/bind/cv_quals.cc: Check for deprecated
	warnings in C++17.
	* testsuite/20_util/bind/cv_quals_2.cc: Likewise, and check for
	ill-formed in C++20.

13 files changed, 87 insertions, 33 deletions

diff --git a/libstdc++-v3/doc/html/index.html b/libstdc++-v3/doc/html/index.html
index 5cc9226..1e0cecb 100644
--- a/libstdc++-v3/doc/html/index.html
+++ b/libstdc++-v3/doc/html/index.html
@@ -142,7 +142,7 @@
     Existing tests
 </a></span></dt><dt><span class="section"><a href="manual/test.html#test.exception.safety.containers">
 C++11 Requirements Test Sequence Descriptions
-</a></span></dt></dl></dd></dl></dd></dl></dd><dt><span class="section"><a href="manual/abi.html">ABI Policy and Guidelines</a></span></dt><dd><dl><dt><span class="section"><a href="manual/abi.html#abi.cxx_interface">The C++ Interface</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning">Versioning</a></span></dt><dd><dl><dt><span class="section"><a href="manual/abi.html#abi.versioning.goals">Goals</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning.history">History</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning.prereq">Prerequisites</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning.config">Configuring</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning.active">Checking Active</a></span></dt></dl></dd><dt><span class="section"><a href="manual/abi.html#abi.changes_allowed">Allowed Changes</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.changes_no">Prohibited Changes</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.impl">Implementation</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.testing">Testing</a></span></dt><dd><dl><dt><span class="section"><a href="manual/abi.html#abi.testing.single">Single ABI Testing</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.testing.multi">Multiple ABI Testing</a></span></dt></dl></dd><dt><span class="section"><a href="manual/abi.html#abi.issues">Outstanding Issues</a></span></dt></dl></dd><dt><span class="section"><a href="manual/api.html">API Evolution and Deprecation History</a></span></dt><dd><dl><dt><span class="section"><a href="manual/api.html#api.rel_300"><code class="constant">3.0</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_310"><code class="constant">3.1</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_320"><code class="constant">3.2</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_330"><code class="constant">3.3</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_340"><code class="constant">3.4</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_400"><code class="constant">4.0</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_410"><code class="constant">4.1</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_420"><code class="constant">4.2</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_430"><code class="constant">4.3</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_440"><code class="constant">4.4</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_450"><code class="constant">4.5</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_460"><code class="constant">4.6</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_470"><code class="constant">4.7</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_480"><code class="constant">4.8</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_490"><code class="constant">4.9</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_51"><code class="constant">5</code></a></span></dt><dd><dl><dt><span class="section"><a href="manual/api.html#api.rel_53"><code class="constant">5.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="manual/api.html#api.rel_61"><code class="constant">6</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_71"><code class="constant">7</code></a></span></dt><dd><dl><dt><span class="section"><a href="manual/api.html#api.rel_72"><code class="constant">7.2</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_73"><code class="constant">7.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="manual/api.html#api.rel_81"><code class="constant">8</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_91"><code class="constant">9</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_101"><code class="constant">10</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_111"><code class="constant">11</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_121"><code class="constant">12</code></a></span></dt></dl></dd><dt><span class="section"><a href="manual/backwards.html">Backwards Compatibility</a></span></dt><dd><dl><dt><span class="section"><a href="manual/backwards.html#backwards.first">First</a></span></dt><dt><span class="section"><a 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+</a></span></dt></dl></dd></dl></dd></dl></dd><dt><span class="section"><a href="manual/abi.html">ABI Policy and Guidelines</a></span></dt><dd><dl><dt><span class="section"><a href="manual/abi.html#abi.cxx_interface">The C++ Interface</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning">Versioning</a></span></dt><dd><dl><dt><span class="section"><a href="manual/abi.html#abi.versioning.goals">Goals</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning.history">History</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning.prereq">Prerequisites</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning.config">Configuring</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.versioning.active">Checking Active</a></span></dt></dl></dd><dt><span class="section"><a href="manual/abi.html#abi.changes_allowed">Allowed Changes</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.changes_no">Prohibited Changes</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.impl">Implementation</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.testing">Testing</a></span></dt><dd><dl><dt><span class="section"><a href="manual/abi.html#abi.testing.single">Single ABI Testing</a></span></dt><dt><span class="section"><a href="manual/abi.html#abi.testing.multi">Multiple ABI Testing</a></span></dt></dl></dd><dt><span class="section"><a href="manual/abi.html#abi.issues">Outstanding Issues</a></span></dt></dl></dd><dt><span class="section"><a href="manual/api.html">API Evolution and Deprecation History</a></span></dt><dd><dl><dt><span class="section"><a href="manual/api.html#api.rel_300"><code class="constant">3.0</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_310"><code class="constant">3.1</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_320"><code class="constant">3.2</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_330"><code class="constant">3.3</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_340"><code class="constant">3.4</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_400"><code class="constant">4.0</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_410"><code class="constant">4.1</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_420"><code class="constant">4.2</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_430"><code class="constant">4.3</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_440"><code class="constant">4.4</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_450"><code class="constant">4.5</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_460"><code class="constant">4.6</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_470"><code class="constant">4.7</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_480"><code class="constant">4.8</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_490"><code class="constant">4.9</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_51"><code class="constant">5</code></a></span></dt><dd><dl><dt><span class="section"><a href="manual/api.html#api.rel_53"><code class="constant">5.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="manual/api.html#api.rel_61"><code class="constant">6</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_71"><code class="constant">7</code></a></span></dt><dd><dl><dt><span class="section"><a href="manual/api.html#api.rel_72"><code class="constant">7.2</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_73"><code class="constant">7.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="manual/api.html#api.rel_81"><code class="constant">8</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_91"><code class="constant">9</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_101"><code class="constant">10</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_111"><code class="constant">11</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_121"><code class="constant">12</code></a></span></dt><dt><span class="section"><a href="manual/api.html#api.rel_123"><code class="constant">12.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="manual/backwards.html">Backwards Compatibility</a></span></dt><dd><dl><dt><span class="section"><a href="manual/backwards.html#backwards.first">First</a></span></dt><dt><span class="section"><a href="manual/backwards.html#backwards.second">Second</a></span></dt><dt><span class="section"><a href="manual/backwards.html#backwards.third">Third</a></span></dt><dd><dl><dt><span class="section"><a href="manual/backwards.html#backwards.third.headers">Pre-ISO headers removed</a></span></dt><dt><span class="section"><a href="manual/backwards.html#backwards.third.hash">Extension headers hash_map, hash_set moved to ext or backwards</a></span></dt><dt><span class="section"><a href="manual/backwards.html#backwards.third.nocreate_noreplace">No <code class="code">ios::nocreate/ios::noreplace</code>.
 </a></span></dt><dt><span class="section"><a href="manual/backwards.html#backwards.third.streamattach">
 No <code class="code">stream::attach(int fd)</code>
 </a></span></dt><dt><span class="section"><a href="manual/backwards.html#backwards.third.support_cxx98">
diff --git a/libstdc++-v3/doc/html/manual/api.html b/libstdc++-v3/doc/html/manual/api.html
index bbda6f5..604380e 100644
--- a/libstdc++-v3/doc/html/manual/api.html
+++ b/libstdc++-v3/doc/html/manual/api.html
@@ -316,6 +316,8 @@ now defaults to zero.
   <code class="classname">has_trivial_default_constructor</code>,
   <code class="classname">has_trivial_copy_constructor</code> and
   <code class="classname">has_trivial_copy_assign</code> removed.
+</p><p>
+Calling a <code class="code">std::bind</code> result as volatile was deprecated for C++17.
 </p><p> Profile Mode was deprecated. </p><div class="section"><div class="titlepage"><div><div><h4 class="title"><a id="api.rel_72"></a><code class="constant">7.2</code></h4></div></div></div><p>
   Library Fundamentals TS header
   <code class="filename">&lt;experimental/source_location&gt;</code>
@@ -468,4 +470,7 @@ they both derive from <code class="classname">std::__new_allocator</code> instea
 <code class="code">noexcept(false)</code> to allow thread cancellation exceptions to
 be thrown from <code class="function">pthread_cond_wait</code> without aborting
 the process.
+</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_123"></a><code class="constant">12.3</code></h3></div></div></div><p>
+Calling a <code class="code">std::bind</code> result as volatile is ill-formed for C++20
+and later.
 </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="abi.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="appendix_porting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="backwards.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ABI Policy and Guidelines </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Backwards Compatibility</td></tr></table></div></body></html>
\ No newline at end of file
diff --git a/libstdc++-v3/doc/html/manual/appendix.html b/libstdc++-v3/doc/html/manual/appendix.html
index bd462e9..c563372 100644
--- a/libstdc++-v3/doc/html/manual/appendix.html
+++ b/libstdc++-v3/doc/html/manual/appendix.html
@@ -16,7 +16,7 @@
     Existing tests
 </a></span></dt><dt><span class="section"><a href="test.html#test.exception.safety.containers">
 C++11 Requirements Test Sequence Descriptions
-</a></span></dt></dl></dd></dl></dd></dl></dd><dt><span class="section"><a href="abi.html">ABI Policy and Guidelines</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.cxx_interface">The C++ Interface</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning">Versioning</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.versioning.goals">Goals</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.history">History</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.prereq">Prerequisites</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.config">Configuring</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.active">Checking Active</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.changes_allowed">Allowed Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.changes_no">Prohibited Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.impl">Implementation</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing">Testing</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.testing.single">Single ABI Testing</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing.multi">Multiple ABI Testing</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.issues">Outstanding Issues</a></span></dt></dl></dd><dt><span class="section"><a href="api.html">API Evolution and Deprecation History</a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_300"><code class="constant">3.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_310"><code class="constant">3.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_320"><code class="constant">3.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_330"><code class="constant">3.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_340"><code class="constant">3.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_400"><code class="constant">4.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_410"><code class="constant">4.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_420"><code class="constant">4.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_430"><code class="constant">4.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_440"><code class="constant">4.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_450"><code class="constant">4.5</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_460"><code class="constant">4.6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_470"><code class="constant">4.7</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_480"><code class="constant">4.8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_490"><code class="constant">4.9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_51"><code class="constant">5</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_53"><code class="constant">5.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_61"><code class="constant">6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_71"><code class="constant">7</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_72"><code class="constant">7.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_73"><code class="constant">7.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_81"><code 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+</a></span></dt></dl></dd></dl></dd></dl></dd><dt><span class="section"><a href="abi.html">ABI Policy and Guidelines</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.cxx_interface">The C++ Interface</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning">Versioning</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.versioning.goals">Goals</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.history">History</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.prereq">Prerequisites</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.config">Configuring</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.active">Checking Active</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.changes_allowed">Allowed Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.changes_no">Prohibited Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.impl">Implementation</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing">Testing</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.testing.single">Single ABI Testing</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing.multi">Multiple ABI Testing</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.issues">Outstanding Issues</a></span></dt></dl></dd><dt><span class="section"><a href="api.html">API Evolution and Deprecation History</a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_300"><code class="constant">3.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_310"><code class="constant">3.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_320"><code class="constant">3.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_330"><code class="constant">3.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_340"><code class="constant">3.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_400"><code class="constant">4.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_410"><code class="constant">4.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_420"><code class="constant">4.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_430"><code class="constant">4.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_440"><code class="constant">4.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_450"><code class="constant">4.5</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_460"><code class="constant">4.6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_470"><code class="constant">4.7</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_480"><code class="constant">4.8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_490"><code class="constant">4.9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_51"><code class="constant">5</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_53"><code class="constant">5.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_61"><code class="constant">6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_71"><code class="constant">7</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_72"><code class="constant">7.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_73"><code class="constant">7.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_81"><code class="constant">8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_91"><code class="constant">9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_101"><code class="constant">10</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_111"><code class="constant">11</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_121"><code class="constant">12</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_123"><code class="constant">12.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="backwards.html">Backwards Compatibility</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.first">First</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.second">Second</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third">Third</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.third.headers">Pre-ISO headers removed</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.hash">Extension headers hash_map, hash_set moved to ext or backwards</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.nocreate_noreplace">No <code class="code">ios::nocreate/ios::noreplace</code>.
 </a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.streamattach">
 No <code class="code">stream::attach(int fd)</code>
 </a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.support_cxx98">
diff --git a/libstdc++-v3/doc/html/manual/appendix_porting.html b/libstdc++-v3/doc/html/manual/appendix_porting.html
index 3d7fb56..55d3f23 100644
--- a/libstdc++-v3/doc/html/manual/appendix_porting.html
+++ b/libstdc++-v3/doc/html/manual/appendix_porting.html
@@ -14,7 +14,7 @@
     Existing tests
 </a></span></dt><dt><span class="section"><a href="test.html#test.exception.safety.containers">
 C++11 Requirements Test Sequence Descriptions
-</a></span></dt></dl></dd></dl></dd></dl></dd><dt><span class="section"><a href="abi.html">ABI Policy and Guidelines</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.cxx_interface">The C++ Interface</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning">Versioning</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.versioning.goals">Goals</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.history">History</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.prereq">Prerequisites</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.config">Configuring</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.active">Checking Active</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.changes_allowed">Allowed Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.changes_no">Prohibited Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.impl">Implementation</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing">Testing</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.testing.single">Single ABI Testing</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing.multi">Multiple ABI Testing</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.issues">Outstanding Issues</a></span></dt></dl></dd><dt><span class="section"><a href="api.html">API Evolution and Deprecation History</a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_300"><code class="constant">3.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_310"><code class="constant">3.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_320"><code class="constant">3.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_330"><code class="constant">3.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_340"><code class="constant">3.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_400"><code class="constant">4.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_410"><code class="constant">4.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_420"><code class="constant">4.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_430"><code class="constant">4.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_440"><code class="constant">4.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_450"><code class="constant">4.5</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_460"><code class="constant">4.6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_470"><code class="constant">4.7</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_480"><code class="constant">4.8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_490"><code class="constant">4.9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_51"><code class="constant">5</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_53"><code class="constant">5.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_61"><code class="constant">6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_71"><code class="constant">7</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_72"><code class="constant">7.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_73"><code class="constant">7.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_81"><code class="constant">8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_91"><code class="constant">9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_101"><code class="constant">10</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_111"><code class="constant">11</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_121"><code class="constant">12</code></a></span></dt></dl></dd><dt><span class="section"><a href="backwards.html">Backwards Compatibility</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.first">First</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.second">Second</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third">Third</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.third.headers">Pre-ISO headers removed</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.hash">Extension headers hash_map, hash_set moved to ext or backwards</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.nocreate_noreplace">No <code class="code">ios::nocreate/ios::noreplace</code>.
+</a></span></dt></dl></dd></dl></dd></dl></dd><dt><span class="section"><a href="abi.html">ABI Policy and Guidelines</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.cxx_interface">The C++ Interface</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning">Versioning</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.versioning.goals">Goals</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.history">History</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.prereq">Prerequisites</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.config">Configuring</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.active">Checking Active</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.changes_allowed">Allowed Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.changes_no">Prohibited Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.impl">Implementation</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing">Testing</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.testing.single">Single ABI Testing</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing.multi">Multiple ABI Testing</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.issues">Outstanding Issues</a></span></dt></dl></dd><dt><span class="section"><a href="api.html">API Evolution and Deprecation History</a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_300"><code class="constant">3.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_310"><code class="constant">3.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_320"><code class="constant">3.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_330"><code class="constant">3.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_340"><code class="constant">3.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_400"><code class="constant">4.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_410"><code class="constant">4.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_420"><code class="constant">4.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_430"><code class="constant">4.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_440"><code class="constant">4.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_450"><code class="constant">4.5</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_460"><code class="constant">4.6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_470"><code class="constant">4.7</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_480"><code class="constant">4.8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_490"><code class="constant">4.9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_51"><code class="constant">5</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_53"><code class="constant">5.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_61"><code class="constant">6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_71"><code class="constant">7</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_72"><code class="constant">7.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_73"><code class="constant">7.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_81"><code class="constant">8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_91"><code class="constant">9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_101"><code class="constant">10</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_111"><code class="constant">11</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_121"><code class="constant">12</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_123"><code class="constant">12.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="backwards.html">Backwards Compatibility</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.first">First</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.second">Second</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third">Third</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.third.headers">Pre-ISO headers removed</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.hash">Extension headers hash_map, hash_set moved to ext or backwards</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.nocreate_noreplace">No <code class="code">ios::nocreate/ios::noreplace</code>.
 </a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.streamattach">
 No <code class="code">stream::attach(int fd)</code>
 </a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.support_cxx98">
diff --git a/libstdc++-v3/doc/html/manual/bugs.html b/libstdc++-v3/doc/html/manual/bugs.html
index 384fe8d..8e0bc1f 100644
--- a/libstdc++-v3/doc/html/manual/bugs.html
+++ b/libstdc++-v3/doc/html/manual/bugs.html
@@ -524,6 +524,12 @@
        </em></span>
     </span></dt><dd><p>Avoid using <code class="code">dynamic_cast</code> when it would be
     ill-formed.
+    </p></dd><dt><a id="manual.bugs.dr2487"></a><span class="term"><a class="link" href="http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#2487" target="_top">2487</a>:
+       <span class="emphasis"><em><code class="code">bind()</code> should be <code class="code">const</code>-overloaded
+      not cv-overloaded
+       </em></span>
+    </span></dt><dd><p>Deprecate volatile-qualified <code class="code">operator()</code>
+    for C++17, make it ill-formed for C++20.
     </p></dd><dt><a id="manual.bugs.dr2499"></a><span class="term"><a class="link" href="http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#2499" target="_top">2499</a>:
        <span class="emphasis"><em><code class="code">operator&gt;&gt;(basic_istream&amp;, CharT*)</code> makes it hard to avoid buffer overflows
        </em></span>
diff --git a/libstdc++-v3/doc/html/manual/index.html b/libstdc++-v3/doc/html/manual/index.html
index 7122dde..2949509 100644
--- a/libstdc++-v3/doc/html/manual/index.html
+++ b/libstdc++-v3/doc/html/manual/index.html
@@ -123,7 +123,7 @@
     Existing tests
 </a></span></dt><dt><span class="section"><a href="test.html#test.exception.safety.containers">
 C++11 Requirements Test Sequence Descriptions
-</a></span></dt></dl></dd></dl></dd></dl></dd><dt><span class="section"><a href="abi.html">ABI Policy and Guidelines</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.cxx_interface">The C++ Interface</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning">Versioning</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.versioning.goals">Goals</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.history">History</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.prereq">Prerequisites</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.config">Configuring</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.active">Checking Active</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.changes_allowed">Allowed Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.changes_no">Prohibited Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.impl">Implementation</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing">Testing</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.testing.single">Single ABI Testing</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing.multi">Multiple ABI Testing</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.issues">Outstanding Issues</a></span></dt></dl></dd><dt><span class="section"><a href="api.html">API Evolution and Deprecation History</a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_300"><code class="constant">3.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_310"><code class="constant">3.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_320"><code class="constant">3.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_330"><code class="constant">3.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_340"><code class="constant">3.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_400"><code class="constant">4.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_410"><code class="constant">4.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_420"><code class="constant">4.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_430"><code class="constant">4.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_440"><code class="constant">4.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_450"><code class="constant">4.5</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_460"><code class="constant">4.6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_470"><code class="constant">4.7</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_480"><code class="constant">4.8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_490"><code class="constant">4.9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_51"><code class="constant">5</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_53"><code class="constant">5.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_61"><code class="constant">6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_71"><code class="constant">7</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_72"><code class="constant">7.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_73"><code class="constant">7.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_81"><code class="constant">8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_91"><code class="constant">9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_101"><code class="constant">10</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_111"><code class="constant">11</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_121"><code class="constant">12</code></a></span></dt></dl></dd><dt><span class="section"><a href="backwards.html">Backwards Compatibility</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.first">First</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.second">Second</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third">Third</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.third.headers">Pre-ISO headers removed</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.hash">Extension headers hash_map, hash_set moved to ext or backwards</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.nocreate_noreplace">No <code class="code">ios::nocreate/ios::noreplace</code>.
+</a></span></dt></dl></dd></dl></dd></dl></dd><dt><span class="section"><a href="abi.html">ABI Policy and Guidelines</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.cxx_interface">The C++ Interface</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning">Versioning</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.versioning.goals">Goals</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.history">History</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.prereq">Prerequisites</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.config">Configuring</a></span></dt><dt><span class="section"><a href="abi.html#abi.versioning.active">Checking Active</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.changes_allowed">Allowed Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.changes_no">Prohibited Changes</a></span></dt><dt><span class="section"><a href="abi.html#abi.impl">Implementation</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing">Testing</a></span></dt><dd><dl><dt><span class="section"><a href="abi.html#abi.testing.single">Single ABI Testing</a></span></dt><dt><span class="section"><a href="abi.html#abi.testing.multi">Multiple ABI Testing</a></span></dt></dl></dd><dt><span class="section"><a href="abi.html#abi.issues">Outstanding Issues</a></span></dt></dl></dd><dt><span class="section"><a href="api.html">API Evolution and Deprecation History</a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_300"><code class="constant">3.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_310"><code class="constant">3.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_320"><code class="constant">3.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_330"><code class="constant">3.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_340"><code class="constant">3.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_400"><code class="constant">4.0</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_410"><code class="constant">4.1</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_420"><code class="constant">4.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_430"><code class="constant">4.3</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_440"><code class="constant">4.4</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_450"><code class="constant">4.5</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_460"><code class="constant">4.6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_470"><code class="constant">4.7</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_480"><code class="constant">4.8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_490"><code class="constant">4.9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_51"><code class="constant">5</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_53"><code class="constant">5.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_61"><code class="constant">6</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_71"><code class="constant">7</code></a></span></dt><dd><dl><dt><span class="section"><a href="api.html#api.rel_72"><code class="constant">7.2</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_73"><code class="constant">7.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="api.html#api.rel_81"><code class="constant">8</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_91"><code class="constant">9</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_101"><code class="constant">10</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_111"><code class="constant">11</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_121"><code class="constant">12</code></a></span></dt><dt><span class="section"><a href="api.html#api.rel_123"><code class="constant">12.3</code></a></span></dt></dl></dd><dt><span class="section"><a href="backwards.html">Backwards Compatibility</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.first">First</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.second">Second</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third">Third</a></span></dt><dd><dl><dt><span class="section"><a href="backwards.html#backwards.third.headers">Pre-ISO headers removed</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.hash">Extension headers hash_map, hash_set moved to ext or backwards</a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.nocreate_noreplace">No <code class="code">ios::nocreate/ios::noreplace</code>.
 </a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.streamattach">
 No <code class="code">stream::attach(int fd)</code>
 </a></span></dt><dt><span class="section"><a href="backwards.html#backwards.third.support_cxx98">
diff --git a/libstdc++-v3/doc/html/manual/using_macros.html b/libstdc++-v3/doc/html/manual/using_macros.html
index 9823046..62c66b7 100644
--- a/libstdc++-v3/doc/html/manual/using_macros.html
+++ b/libstdc++-v3/doc/html/manual/using_macros.html
@@ -43,7 +43,7 @@
       <a class="link" href="configure.html" title="Configure">Configure</a>),
       with the various --enable/--disable choices being translated to
       #define/#undef).
-   </p><p> <acronym class="acronym">ABI</acronym> means that changing from the default value may
+   </p><p> <acronym class="acronym">ABI</acronym>-changing means that changing from the default value may
   mean changing the <acronym class="acronym">ABI</acronym> of compiled code. In other words,
   these choices control code which has already been compiled (i.e., in a
   binary such as libstdc++.a/.so).  If you explicitly #define or
@@ -53,7 +53,8 @@
   consistent linkage requires changing the config headers before
   building/installing the library.
    </p><div class="variablelist"><dl class="variablelist"><dt><span class="term"><code class="code">_GLIBCXX_USE_DEPRECATED</code></span></dt><dd><p>
-	Defined by default. Not configurable. ABI-changing. Turning this off
+	Defined to the value <code class="literal">1</code> by default.
+	Not configurable. ABI-changing. Turning this off
 	removes older ARM-style iostreams code, and other anachronisms
 	from the API.  This macro is dependent on the version of the
 	standard being tracked, and as a result may give different results for
diff --git a/libstdc++-v3/doc/xml/manual/evolution.xml b/libstdc++-v3/doc/xml/manual/evolution.xml
index 4923e8c..8293618 100644
--- a/libstdc++-v3/doc/xml/manual/evolution.xml
+++ b/libstdc++-v3/doc/xml/manual/evolution.xml
@@ -817,6 +817,10 @@ now defaults to zero.
   <classname>has_trivial_copy_assign</classname> removed.
 </para>
 
+<para>
+Calling a <code>std::bind</code> result as volatile was deprecated for C++17.
+</para>
+
 <para> Profile Mode was deprecated. </para>
 
 <section xml:id="api.rel_72"><info><title><constant>7.2</constant></title></info>
@@ -1067,4 +1071,13 @@ the process.
 
 </section>
 
+
+<section xml:id="api.rel_123"><info><title><constant>12.3</constant></title></info>
+<para>
+Calling a <code>std::bind</code> result as volatile is ill-formed for C++20
+and later.
+</para>
+
+</section>
+
 </section>
diff --git a/libstdc++-v3/doc/xml/manual/intro.xml b/libstdc++-v3/doc/xml/manual/intro.xml
index d341c3e..e3a03cf 100644
--- a/libstdc++-v3/doc/xml/manual/intro.xml
+++ b/libstdc++-v3/doc/xml/manual/intro.xml
@@ -1163,6 +1163,15 @@ requirements of the license of GCC.
     ill-formed.
     </para></listitem></varlistentry>
 
+    <varlistentry xml:id="manual.bugs.dr2487"><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="&DR;#2487">2487</link>:
+       <emphasis><code>bind()</code> should be <code>const</code>-overloaded
+      not cv-overloaded
+       </emphasis>
+    </term>
+    <listitem><para>Deprecate volatile-qualified <code>operator()</code>
+    for C++17, make it ill-formed for C++20.
+    </para></listitem></varlistentry>
+
     <varlistentry xml:id="manual.bugs.dr2499"><term><link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="&DR;#2499">2499</link>:
        <emphasis><code>operator>>(basic_istream&amp;, CharT*)</code> makes it hard to avoid buffer overflows
        </emphasis>
diff --git a/libstdc++-v3/doc/xml/manual/using.xml b/libstdc++-v3/doc/xml/manual/using.xml
index 0acdba6..9c444dd 100644
--- a/libstdc++-v3/doc/xml/manual/using.xml
+++ b/libstdc++-v3/doc/xml/manual/using.xml
@@ -1062,7 +1062,7 @@ g++ -Winvalid-pch -I. -include stdc++.h -H -g -O2 hello.cc -o test.exe
       #define/#undef).
    </para>
 
-   <para> <acronym>ABI</acronym> means that changing from the default value may
+   <para> <acronym>ABI</acronym>-changing means that changing from the default value may
   mean changing the <acronym>ABI</acronym> of compiled code. In other words,
   these choices control code which has already been compiled (i.e., in a
   binary such as libstdc++.a/.so).  If you explicitly #define or
@@ -1077,7 +1077,8 @@ g++ -Winvalid-pch -I. -include stdc++.h -H -g -O2 hello.cc -o test.exe
     <varlistentry><term><code>_GLIBCXX_USE_DEPRECATED</code></term>
     <listitem>
       <para>
-	Defined by default. Not configurable. ABI-changing. Turning this off
+	Defined to the value <literal>1</literal> by default.
+	Not configurable. ABI-changing. Turning this off
 	removes older ARM-style iostreams code, and other anachronisms
 	from the API.  This macro is dependent on the version of the
 	standard being tracked, and as a result may give different results for
diff --git a/libstdc++-v3/include/std/functional b/libstdc++-v3/include/std/functional
index c4f7588..5235ef2 100644
--- a/libstdc++-v3/include/std/functional
+++ b/libstdc++-v3/include/std/functional
@@ -465,6 +465,17 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
   /// @endcond
 
+#if __cplusplus == 201703L && _GLIBCXX_USE_DEPRECATED
+# define _GLIBCXX_VOLATILE_BIND
+// _GLIBCXX_RESOLVE_LIB_DEFECTS
+// 2487. bind() should be const-overloaded, not cv-overloaded
+# define _GLIBCXX_DEPR_BIND \
+      [[deprecated("std::bind does not support volatile in C++17")]]
+#elif __cplusplus < 201703L
+# define _GLIBCXX_VOLATILE_BIND
+# define _GLIBCXX_DEPR_BIND
+#endif
+
   /// Type of the function object returned from bind().
   template<typename _Signature>
     class _Bind;
@@ -501,6 +512,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	      );
 	}
 
+#ifdef _GLIBCXX_VOLATILE_BIND
       // Call as volatile
       template<typename _Result, typename... _Args, std::size_t... _Indexes>
 	_Result
@@ -522,6 +534,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	      _Mu<_Bound_args>()(__volget<_Indexes>(_M_bound_args), __args)...
 	      );
 	}
+#endif // volatile
 
       template<typename _BoundArg, typename _CallArgs>
 	using _Mu_type = decltype(
@@ -585,12 +598,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	      _Bound_indexes());
 	}
 
-#if __cplusplus > 201402L
-# define _GLIBCXX_DEPR_BIND \
-      [[deprecated("std::bind does not support volatile in C++17")]]
-#else
-# define _GLIBCXX_DEPR_BIND
-#endif
+#ifdef _GLIBCXX_VOLATILE_BIND
       // Call as volatile
       template<typename... _Args,
 	       typename _Result = _Res_type_cv<tuple<_Args...>, add_volatile>>
@@ -614,6 +622,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	      std::forward_as_tuple(std::forward<_Args>(__args)...),
 	      _Bound_indexes());
 	}
+#endif // volatile
     };
 
   /// Type of the function object returned from bind<R>().
@@ -649,9 +658,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 		      (std::get<_Indexes>(_M_bound_args), __args)...);
 	}
 
+#ifdef _GLIBCXX_VOLATILE_BIND
       // Call as volatile
       template<typename _Res, typename... _Args, std::size_t... _Indexes>
-	_GLIBCXX20_CONSTEXPR
 	_Res
 	__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>) volatile
 	{
@@ -661,7 +670,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
       // Call as const volatile
       template<typename _Res, typename... _Args, std::size_t... _Indexes>
-	_GLIBCXX20_CONSTEXPR
 	_Res
 	__call(tuple<_Args...>&& __args,
 	       _Index_tuple<_Indexes...>) const volatile
@@ -669,6 +677,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	  return std::__invoke_r<_Res>(_M_f, _Mu<_Bound_args>()
 		      (__volget<_Indexes>(_M_bound_args), __args)...);
 	}
+#endif // volatile
 
     public:
       typedef _Result result_type;
@@ -710,6 +719,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	      _Bound_indexes());
 	}
 
+#ifdef _GLIBCXX_VOLATILE_BIND
       // Call as volatile
       template<typename... _Args>
 	_GLIBCXX_DEPR_BIND
@@ -731,7 +741,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 	      std::forward_as_tuple(std::forward<_Args>(__args)...),
 	      _Bound_indexes());
 	}
+#else
+      template<typename... _Args>
+	void operator()(_Args&&...) const volatile = delete;
+#endif // volatile
     };
+
+#undef _GLIBCXX_VOLATILE_BIND
 #undef _GLIBCXX_DEPR_BIND
 
   /**
diff --git a/libstdc++-v3/testsuite/20_util/bind/cv_quals.cc b/libstdc++-v3/testsuite/20_util/bind/cv_quals.cc
index 8331239..79e3e2f 100644
--- a/libstdc++-v3/testsuite/20_util/bind/cv_quals.cc
+++ b/libstdc++-v3/testsuite/20_util/bind/cv_quals.cc
@@ -17,6 +17,7 @@
 
 // 20.7.11 Function template bind
 
+// { dg-options "-Wdeprecated-declarations" }
 // { dg-do run { target c++11 } }
 
 #include <functional>
@@ -48,12 +49,12 @@ void test01()
   const auto b1 = std::bind(X());
   VERIFY( b1() == 1 );
 
-#if __cplusplus <= 201402L
+#if __cplusplus <= 201703L
   volatile auto b2 = std::bind(X());
-  VERIFY( b2() == 2 );
+  VERIFY( b2() == 2 ); // { dg-warning "deprecated" "" { target c++17_only } }
 
   const volatile auto b3 = std::bind(X());
-  VERIFY( b3() == 3 );
+  VERIFY( b3() == 3 ); // { dg-warning "deprecated" "" { target c++17_only } }
 #endif
 }
 
@@ -65,12 +66,12 @@ void test02()
   const auto b1 = std::bind<int>(X());
   VERIFY( b1() == 1 );
 
-#if __cplusplus <= 201402L
+#if __cplusplus <= 201703L
   volatile auto b2 = std::bind<int>(X());
-  VERIFY( b2() == 2 );
+  VERIFY( b2() == 2 ); // { dg-warning "deprecated" "" { target c++17_only } }
 
   const volatile auto b3 = std::bind<int>(X());
-  VERIFY( b3() == 3 );
+  VERIFY( b3() == 3 ); // { dg-warning "deprecated" "" { target c++17_only } }
 #endif
 }
 
@@ -82,12 +83,12 @@ void test03()
   const auto b1 = std::bind(X(), _1, 0, _2);
   VERIFY( b1(0, 0) == 1 );
 
-#if __cplusplus <= 201402L
+#if __cplusplus <= 201703L
   volatile auto b2 = std::bind(X(), _1, _2, 0);
-  VERIFY( b2(0, 0) == 2 );
+  VERIFY( b2(0, 0) == 2 ); // { dg-warning "deprecated" "" { target c++17_only } }
 
   const volatile auto b3 = std::bind(X(), _1, 0, _2);
-  VERIFY( b3(0, 0) == 3 );
+  VERIFY( b3(0, 0) == 3 ); // { dg-warning "deprecated" "" { target c++17_only } }
 #endif
 }
 
@@ -99,12 +100,12 @@ void test04()
   const auto b1 = std::bind<int>(X(), _1, 0, _2);
   VERIFY( b1(0, 0) == 1 );
 
-#if __cplusplus <= 201402L
+#if __cplusplus <= 201703L
   volatile auto b2 = std::bind<int>(X(), _1, _2, 0);
-  VERIFY( b2(0, 0) == 2 );
+  VERIFY( b2(0, 0) == 2 ); // { dg-warning "deprecated" "" { target c++17_only } }
 
   const volatile auto b3 = std::bind<int>(X(), _1, 0, _2);
-  VERIFY( b3(0, 0) == 3 );
+  VERIFY( b3(0, 0) == 3 ); // { dg-warning "deprecated" "" { target c++17_only } }
 #endif
 }
 
diff --git a/libstdc++-v3/testsuite/20_util/bind/cv_quals_2.cc b/libstdc++-v3/testsuite/20_util/bind/cv_quals_2.cc
index 7a85568..d2ebad72 100644
--- a/libstdc++-v3/testsuite/20_util/bind/cv_quals_2.cc
+++ b/libstdc++-v3/testsuite/20_util/bind/cv_quals_2.cc
@@ -15,7 +15,9 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-do run { target c++11 } }
+// { dg-options "-Wdeprecated-declarations" }
+// { dg-do run { target { c++11 && c++17_down } } }
+// { dg-do compile { target c++20 } }
 
 #include <functional>
 #include <testsuite_hooks.h>
@@ -33,13 +35,13 @@ void test01()
   const auto b0 = std::bind(X());
   VERIFY( b0() == 0 );
 
-#if __cplusplus <= 201402L
   volatile auto b1 = std::bind(X());
-  VERIFY( b1() == 1 );
+  VERIFY( b1() == 1 ); // { dg-warning "deprecated" "" { target c++17_only } }
+		       // { dg-error "no match" "" { target c++20 } 39 }
 
   const volatile auto b2 = std::bind(X());
-  VERIFY( b2() == 2 );
-#endif
+  VERIFY( b2() == 2 ); // { dg-warning "deprecated" "" { target c++17_only } }
+		       // { dg-error "no match" "" { target c++20 } 43 }
 }
 
 int main()