From: Simon Wright <simon@pushface.org>
Subject: Re: GNAT vs UTF-8 source file names
Date: Tue, 04 Jul 2017 14:57:03 +0100
Date: 2017-07-04T14:57:03+01:00 [thread overview]
Message-ID: <lyeftw2tlc.fsf@pushface.org> (raw)
In-Reply-To: lyefuia5ur.fsf@pushface.org
Simon Wright <simon@pushface.org> writes:
> PR ada/81114 refers[1].
>
> It turns out that this failure occurs on Windows and macOS. The problem
> is that GNAT smashes the file name to lower case if it knows that the
> file system is case-insensitive (using an ASCII to-lower, so of course
> 'smash' is the right word if there are UTF-8 characters in there).
> [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81114
It's worse than that, on macOS anyway[2].
$ GNAT_FILE_NAME_CASE_SENSITIVE=1 gnatmake -c p*.ads
gcc -c páck3.ads
páck3.ads:1:10: warning: file name does not match unit name, should be "páck3.ads"
The reason for this apparently-bizarre message is[3] that macOS takes
the composed form (lowercase a acute) and converts it under the hood
to what HFS+ insists on, the fully decomposed form (lowercase a, combining
acute); thus the names are actually different even though they _look_
the same.
I have to say that, great as it would be to have this fixed, the changes
required would be extensive, and I can’t see that anyone would think it
worth the trouble.
The recommendation would be "don’t use international characters in the
names of library units".
[2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81114#c1
[3] https://stackoverflow.com/a/6153713/40851
next prev parent reply other threads:[~2017-07-04 13:57 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-30 17:10 GNAT vs UTF-8 source file names Simon Wright
2017-06-17 17:20 ` Simon Wright
2017-06-27 13:22 ` Jacob Sparre Andersen
2017-06-27 21:45 ` Niklas Holsti
2017-06-28 5:05 ` G.B.
2017-07-04 13:57 ` Simon Wright [this message]
2017-07-04 17:30 ` Shark8
2017-07-04 18:08 ` Dennis Lee Bieber
2017-07-05 5:25 ` J-P. Rosen
2017-07-06 15:18 ` Shark8
2017-07-07 8:19 ` J-P. Rosen
2017-07-05 5:21 ` J-P. Rosen
2017-07-05 9:47 ` Simon Wright
2017-07-05 11:20 ` J-P. Rosen
2017-07-05 18:42 ` Randy Brukardt
2017-07-06 18:43 ` Simon Wright
2017-07-07 8:26 ` J-P. Rosen
2017-07-07 11:01 ` Simon Wright
2017-07-07 11:49 ` Jacob Sparre Andersen
2017-07-07 19:44 ` Randy Brukardt
2017-07-07 19:40 ` Randy Brukardt
2017-07-07 21:02 ` Simon Wright
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