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From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Subject: Re: difference between cygwin32 and cygwin64 mounts breaks libtool
Reply-To: Brian DOT Inglis AT SystematicSw DOT ab DOT ca
References: <10970996 DOT g4281J4DVJ AT linuix DOT haible DOT de> <aa662241-b0b6-ad01-694d-21388f38e59b AT gmail DOT com>
To: cygwin AT cygwin DOT com
Message-ID: <48f922a7-ef19-3f67-7be3-122c5ae31f40@SystematicSw.ab.ca>
Date: Mon, 21 Nov 2016 06:40:35 -0700
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On 2016-11-20 12:01, cyg Simple wrote:
> On 11/18/2016 7:15 PM, Bruno Haible wrote:
>> When a user has installed cygwin64 and the cross-compilation environment
>> for compiling to 32-bit cygwin (i686-pc-cygwin-gcc et al.), then
>> building (with --host=i686-pc-cygwin) a package that creates a shared
>> library and a program that uses this shared library - in different
>> source directories - makes use of libtool features: The uninstalled program
>> (i.e. the program in the build tree) is a wrapper program (built by libtool)
>> that sets up PATH so that the real program should find the (uninstalled)
>> shared library before invoking the real program.
>> This works when building outside of C:\cygwin64 (for example, in
>> C:\Users\bruno), but it does not work when building inside C:\cygwin64
>> (for example, in C:\cygwin64\home = /home). In this case, the uninstalled
>> program exits with exit code 127. When this uninstalled program is run
>> in a cmd.exe window, it prints a diagnostic message that mentions which
>> shared library it could not find.
> This is a long standing collision and I don't think you'll be able to
> get it to work as you want.  You might want to discuss with libtool list.
>> Is there a way to configure the mounts of the 32-bit cygwin subsystem
>> and the mounts of the 64-bit cygwin so that this will work also in /home?
> Short answer is no.  You're best scenario might be to have differing
> /home paths and symlink the common files in one of them.  Otherwise
> you're likely to end up with PATH that is overlapping and that doesn't work.

Have you got LT_CYGPATH pointing to cygwin32 cygpath as described (or implied) in:
https://www.gnu.org/software/libtool/manual/html_node/Cygwin_002fWindows-File-Name-Conversion.html#Cygwin_002fWindows-File-Name-Conversion

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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