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Date: Tue, 9 Jun 2015 16:16:06 -0400
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From: DJ Delorie <dj AT delorie DOT com>
To: djgpp AT delorie DOT com
In-reply-to: <557739E0.6070608@gmail.com> (djgpp@delorie.com)
Subject: Re: Detecting the presence of doslfn?
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It's the right place.

There's _use_lfn():

http://www.delorie.com/djgpp/doc/libc/libc_843.html

Also, the function _get_volume_info() returns flags that describe the
filesystem.  One of them is _FILESYS_LFN_SUPPORTED:

http://www.delorie.com/djgpp/doc/libc/libc_380.html