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Cygwin: Add FAQ How do I fix find_fast_cwd warnings?

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Brian Inglis 2017-11-14 23:01:42 -07:00 committed by Corinna Vinschen
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@ -1419,4 +1419,54 @@ such as virtual memory paging and file caching.</para>
difficult to make <literal>fork()</literal> work reliably.</para>
</answer>
</qandaentry>
<qandaentry id='faq.using.fixing-find_fast_cwd-warnings'>
<question><para>How do I fix <literal>find_fast_cwd</literal> warnings?</para></question>
<answer>
<para>Older Cygwin releases asked users to report problems to the mailing
list with the message:</para>
<screen>
find_fast_cwd: WARNING: Couldn't compute FAST_CWD pointer. Please report
this problem to the public mailing list <ulink url="mailto:cygwin@cygwin.com">cygwin@cygwin.com</ulink></screen>
<para>Recent Cygwin releases changed this to the message:</para>
<screen>
This typically occurs if you're using an older Cygwin version on a newer Windows.
Please update to the latest available Cygwin version from <ulink url="https://cygwin.com/">https://cygwin.com/</ulink>.
If the problem persists, please see <ulink url="https://cygwin.com/problems.html">https://cygwin.com/problems.html</ulink>.</screen>
<para>This is not serious, just a warning that Cygwin may not always be
able to exactly emulate all aspects of Unix current directory handling
under your Windows release.</para>
<para>Unfortunately some projects and products still distribute older
Cygwin releases which may not fully support newer Windows releases,
instead of installing the current release from the Cygwin project.
They also may not provide any obvious way to keep the Cygwin packages
their application uses up to date with fixes for security issues and
upgrades.</para>
<para>The solution is simply downloading and running Cygwin Setup,
following the instructions in the Internet Setup section of
<ulink url="https://cygwin.com/cygwin-ug-net/setup-net.html#internet-setup">
Setting Up Cygwin</ulink> in the Cygwin User's Guide.</para>
<para>Please exit from all applications before running Cygwin Setup.
When running Setup, you should not change most of the values presented,
just select the <literal>Next</literal> button in most cases, as you
already have a Cygwin release installed, and only want to upgrade your
current installation.
You should make your own selection if the internet connection to your
system requires a proxy; and you must always pick an up to date Cygwin
download (mirror) site, preferably the site nearest to your system for
faster downloads, as shown, with more details to help you choose, on the
<ulink url="https://cygwin.com/mirrors.html">
Mirror Sites</ulink> web page.</para>
<para>Cygwin Setup will download and apply upgrades to all packages
required for Cygwin itself and installed applications.
Any problems with applying updates, or the application after updates,
should be reported to the project or product supplier for remedial
action.</para>
<para>As Cygwin is a volunteer project, unable to provide support for older
releases installed by projects or products, it would be helpful to let
other users know what project or product you installed, in a quick
<ulink url="mailto:cygwin@cygwin.com?subject=Application%20with%20old%20Cygwin%20warning%20about%20FAST_CWD">
email</ulink>.</para>
</answer>
</qandaentry>
</qandadiv>