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Re: Resurrect discussion: Mixing 32 and 64 bit distro


On 15 February 2013 11:40, Corinna Vinschen wrote:
> On Feb 15 04:40, Yaakov wrote:
>> On Fri, 15 Feb 2013 11:22:26 +0100, Corinna Vinschen wrote:
>> > 1. Revert all toolchain changes which change the DLL prefix from
>> >    "cyg" to "cyg64".
>>
>> Revert.
>>
>> > 2. Rename the Cygwin DLL back from cyg64win1.dll to cygwin1.dll.
>> >
>> >    This is probably purely a matter of taste.  It has nothing to do with
>> >    point 1.  We can keep the name of theCygwin DLL without compromising
>> >    the "cyg" prefix elsewhere.  Actually, it even simplifies the
>> >    recognition of a 64 bit Cygwin process at spawn/exec time.
>>
>> It still makes dlopen()ing the Cygwin DLL -- a technique which is used
>> by Mono, Python ctypes, Ruby FFI, JNA, etc., and LD_PRELOAD hacks (among
>> others) -- more complicated.  I'd prefer to revert.
>>
>> > 3. Revert the path to link libs from "${prefix}/lib64" to "${prefix}/lib".
>> >
>> >    I'm actually not quite sure about that.  The lib64 path is in the
>> >    toolchain now and it appears to work nicely.  Apparently it also
>> >    works fine for 64 bit Linux.  In conjunction with point 1, if we
>> >    ever decide that we yet need interoperability with 32 bit Cygwin
>> >    processes, keeping the lib path to lib64 would help to integrate
>> >    both worlds.  What is the problem with lib64 again?
>>
>> Not so sure about that first point; while ld (and w32api) wanted lib64,
>> gcc wouldn't recognize it, at least not with a sys-root.  While
>> doable, it does mean adjustments to cygport and some .cygport files,
>> as well as patches (available in Fedora and other distros) for some
>> packages which aren't lib64 aware.  If we don't need it, why bother?
>>
>> As for the future, I think we already agreed that trying to manage a
>> fully multiarch distro isn't feasible with setup/upset.  If we're
>> talking only about multiarch-ing Cygwin itself, I think a lib32/lib
>> combination would do.
>
> Ok, let's go the full way.
>
> You *are* all aware that renaming the DLL back to cygwin1.dll means
> that, afterwards, none of the currently existing binaries will work
> anymore, right?

Fine by me. It would be silly to demand binary (or source) backward
compatibilty at this point.

Andy


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