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Rebuild in progress release notes

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@@ -65,6 +65,21 @@
<div id="version_1_75_0.updated_libraries">
<h3><span class="link">Updated Libraries</span></h3>
<ul>
<li>
<div>
<span class="library"><a href="/doc/libs/master/libs/atomic/">Atomic</a>:</span>
<ul>
<li>
<div>
Implemented SSE2 and SSE4.1 versions of address lookup algorithm,
which is used in the internal lock pool implementation. This may
improve performance of waiting and notifying operations in heavily
contended cases.
</div>
</li>
</ul>
</div>
</li>
<li>
<div>
<span class="library"><a href="/doc/libs/master/libs/container/">Container</a>:</span>
@@ -173,6 +188,78 @@
</ul>
</div>
</li>
<li>
<div>
<span class="library"><a href="/doc/libs/master/libs/filesystem/">Filesystem</a>:</span>
<ul>
<li>
<div>
<strong>New:</strong> Added <code><span class="identifier">creation_time</span></code>
operation, which allows to obtain file creation time. (Inspired by
<a href="https://github.com/boostorg/filesystem/pull/134">PR#134</a>)
</div>
</li>
<li>
<div>
The returned value of <code><span class="identifier">last_write_time</span><span class="special">(</span><span class="identifier">p</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">)</span></code> operation in case of failure has
been changed to a minimal value representable by <code><span class="identifier">std</span><span class="special">::</span><span class="identifier">time_t</span></code>
instead of -1.
</div>
</li>
<li>
<div>
The returned value of <code><span class="identifier">hard_link_count</span><span class="special">(</span><span class="identifier">p</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">)</span></code> operation in case of failure has
been changed to <code><span class="keyword">static_cast</span><span class="special">&lt;</span><span class="identifier">uintmax_t</span><span class="special">&gt;(-</span><span class="number">1</span><span class="special">)</span></code> instead of 0.
</div>
</li>
<li>
<div>
On POSIX systems, <code><span class="identifier">file_size</span></code>
will now indicate error code <code><span class="identifier">errc</span><span class="special">::</span><span class="identifier">function_not_supported</span></code>
if the path resolves to a non-regular file. Previously, <code><span class="identifier">errc</span><span class="special">::</span><span class="identifier">operation_not_permitted</span></code> was reported.
</div>
</li>
<li>
<div>
On Linux, many operations now use <code><span class="identifier">statx</span></code>
system call internally, when possible, which allows to reduce the
amount of information queried from the filesystem and potentially
improve performance. The <code><span class="identifier">statx</span></code>
system call was introduced in Linux kernel 4.11.
</div>
</li>
<li>
<div>
Removed <code><span class="keyword">const</span></code>-qualification
from return types of some <code><span class="identifier">path</span></code>
methods. This could prevent move construction and move assignment
at the call site in some cases. (<a href="https://github.com/boostorg/filesystem/issues/160">#160</a>)
</div>
</li>
<li>
<div>
On OpenBSD 4.4 and newer, use <code><span class="identifier">statvfs</span></code>
system call to obtain filesystem space information. (Inspired by
<a href="https://github.com/boostorg/filesystem/pull/162">PR#162</a>)
</div>
</li>
</ul>
</div>
</li>
<li>
<div>
<span class="library"><a href="/doc/libs/master/libs/gil/">GIL</a>:</span>
<ul>
<li>
<div>
BREAKING: In next release, we are going to drop support for GCC 5.
We may also change the required minimum C++ version from C++11 to
C++14.
</div>
</li>
</ul>
</div>
</li>
<li>
<div>
<span class="library"><a href="/doc/libs/master/libs/interprocess/">Interprocess</a>:</span>
@@ -223,6 +310,48 @@
</ul>
</div>
</li>
<li>
<div>
<span class="library"><a href="/doc/libs/master/libs/log/">Log</a>:</span>
<ul>
<li>
<div>
Bug fixes:
<ul>
<li>
<div>
Corrected the file counter that would be used in <code><span class="identifier">text_file_backend</span></code> when generating
the target file name (based on the pattern set by <code><span class="identifier">set_target_file_name_pattern</span></code>
method) when the log file is rotated. (<a href="https://github.com/boostorg/log/issues/125">#125</a>)
</div>
</li>
<li>
<div>
Replaced a volatile version counter in <code><span class="identifier">basic_sink_frontend</span></code>
with an atomic. (<a href="https://github.com/boostorg/log/issues/128">#128</a>)
</div>
</li>
<li>
<div>
In the <code><span class="identifier">asynchronous_sink</span></code>
frontend, resolved a possible conflict between <code><span class="identifier">flush</span></code> and <code><span class="identifier">run</span></code>
methods, if <code><span class="identifier">run</span></code>
is called from a user's thread instead of the internal dedicated
thread spawned by the frontend. (<a href="https://github.com/boostorg/log/issues/131">#131</a>)
</div>
</li>
</ul>
</div>
</li>
<li>
<div>
See <a href="/doc/libs/master/libs/log/doc/html/log/changelog.html">changelog</a>
for more details.
</div>
</li>
</ul>
</div>
</li>
<li>
<div>
<span class="library"><a href="/doc/libs/master/libs/move/">Move</a>:</span>