Re: Changing default paths for mono packages

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Hi Toshio,

On 05/31/2011 11:43 PM, Toshio Kuratomi wrote:
> On Tue, May 31, 2011 at 09:01:00PM +0200, Christian Krause wrote:
>> Hi,
>>
>> On 05/31/2011 06:02 PM, Toshio Kuratomi wrote:

>> However, even if it would be easy for packages like "monodevelop", which
>> contain only C# assemblies and no ELF libraries there may be problems
>> with packages like f-spot, which contains mostly C# assemblies but also
>> include one "glue code" ELF library. Should the package then be split?
>> That sounds a little bit like overkill just for the purpose of having
>> 100% pure correctness of the packages without solving any real problems.
>> ;-)
>>
> Well, it seems like the problems with conflicts between x86 and x86_64 would
> be solved by making noarch packages.  The splitting of packages is just

Since the mono runtime environment contains arch-dependent executables
(e.g. /usr/bin/mono), it will never be possible to install both the x86
and the x86_64 stack on x86_64. So multi-arch seems to be impossible
with mono.

On the other hand, since the C# assemblies are exchangeable between x86
and x86_64, it should be possible to have a shared /usr/lib directory
even without splitting the packages.

If I have misunderstood the intention, please explain the use case in
detail.

> making a noarch subpackage so it's pretty straightforward.  It doesn't seem
> like too much overkill, is more correct as you point out, and is a natural
> extension of the way pure C# would be packaged.

Hm, just because a package contains arch-dependent and arch-independent
libraries, this does not automatically call for separating the
arch-independent parts into noarch packages. Just look at all python or
perl packages which come with e.g. arch-independent python/perl
parts/libraries and additionally contain ELF binary parts or not
splitted. These packages are just then arch-dependent.

So I currently don't see why we should do it otherwise for C# packages.

> OTOH, with other languages (for instance python) only some things end up
> multilibbed.  For instance, python-libs (from the python package) is
> multilib and pygtk2-devel is multilib (but not pygtk2 itself).
> python-pycurl is an example of a package that is not multilibbed.  So... eh,
> your argument makes enough sense to me.

Just to avoid misunderstandings: What do you specifically mean with
multilibbed? The ability to install both packages (i686 and x86_64) on
x86_64 without getting any conflicts?

>> I have also verified this with the mono disassembler:
>> ----------------------------------------------
>> # diff -u <(monodis
>> /tmp/f-spot-0.8.2-1.fc14.i686/usr/lib/f-spot/TagLib.dll) <(monodis
>> /tmp/f-spot-0.8.2-1.fc14.x86_64/usr/lib64/f-spot/TagLib.dll)
>> --- /proc/self/fd/63    2011-05-31 20:57:01.172361683 +0200
>> +++ /proc/self/fd/62    2011-05-31 20:57:01.172361683 +0200
>> @@ -20,9 +20,9 @@
>>
>>    .custom instance void class
>> ApplicationBuildInformationAttribute::'.ctor'(string, string, string,
>> string) =  (
>>                 01 00 0E 73 6F 75 72 63 65 2D 74 61 72 62 61 6C   //
>> ...source-tarbal
>> -               6C 09 6C 69 6E 75 78 2D 67 6E 75 04 69 33 38 36   //
>> l.linux-gnu.i386
>> -               17 32 30 31 30 2D 31 32 2D 33 30 20 31 39 3A 34   //
>> .2010-12-30 19:4
>> -               35 3A 34 37 20 55 54 43 00 00                   ) //
>> 5:47 UTC..
>> +               6C 09 6C 69 6E 75 78 2D 67 6E 75 06 78 38 36 5F   //
>> l.linux-gnu.x86_
>> +               36 34 17 32 30 31 30 2D 31 32 2D 33 30 20 31 39   //
>> 64.2010-12-30 19
>> +               3A 34 35 3A 33 32 20 55 54 43 00 00             ) //
>> :45:32 UTC..
>>
>>
> Huh.  That linux-gnu.i386 vs linux-gnu.x86_64 line seems a bit fishy but
> apparently that's only informational, mono isn't doing anything with it?

I have double-checked this: that is just a data structure containing
some strings about the build host. Some C# projects use such kind of
data structure and customize the strings during build time. AFAIK it has
no run-time impact at all.

> I don't see anything else that might be problematic in there.

Can I treat this as the official approval from FPC - or how should I
proceed from here? ;-)


Best regards,
Christian
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