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Date: Tue, 10 Mar 2020 17:16:12 +0200
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From: Eli Zaretskii <eliz@gnu.org>
To: Jon Turney <jon.turney@dronecode.org.uk>
Cc: gdb-patches@sourceware.org
In-Reply-To: <85cd5fc2-8fa7-3612-b974-b3a3261bbb29@dronecode.org.uk> (message
 from Jon Turney on Sun, 8 Mar 2020 14:05:10 +0000)
Subject: Re: [PATCH] gdb: recognize 64 bits Windows executables as Cygwin osabi
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> From: Jon Turney <jon.turney@dronecode.org.uk>
> Date: Sun, 8 Mar 2020 14:05:10 +0000
> 
> >> So what we can do is add an "MS-Windows" osabi and make "Cygwin" and
> >> "MS-Windows" functionally equivalent.  Any "pei-i386" or "pei-x86-64"
> >> executable would be detected as "MS-Windows".
> 
> I believe this suggestion for x86_64 is wrong, in the other direction:
> x86_64 Cygwin is LP64, but Windows is LLP64 (Se also table in [1])

If the LP64 thing is part of what defines the OS ABI, then yes, Cygwin
should have a separate value.

> (currently 'print sizeof(long)' incorrectly returns 4 on a gdb built for 
> Cygwin)

So I guess calling it "Cygwin" doesn't help? ;-)