error install activerdf-jena, activerdf-sparql, json in jruby under fedora

it's great news that activerdf could use jena as a back
end.

but when i tried to install json in jruby on my fedora pc,
an error came
out said "could not find mkmf.rb" when it tried to
compile json. from
the jruby mailing list i learned that mkmf.rb is required
for compile c
files, and jruby cannot load the local compiled lib.

i noticed that there're json ms-win32 edition avaliable and
i think in
windows json may work well, but there's no java, linux or
jruby edition
of json. what should i do?
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i tried json_pure as you said and json_pure was installed
successfully.
but activerdf_sparql failed to install again, it's still
asking for
json...

On Fri, 2007-09-28 at 08:50 +0300, Mikael Lammentausta
wrote:
> Use json_pure, which does not have the native
dependencies.
> 
> 
> 2007/9/28, gsofhon <gsofhongmail.com>:
>         it's great news that activerdf could use jena
as a back end.
>         
>         but when i tried to install json in jruby on my
fedora pc, an
>         error came
>         out said "could not find mkmf.rb"
when it tried to compile
>         json. from 
>         the jruby mailing list i learned that mkmf.rb
is required for
>         compile c
>         files, and jruby cannot load the local compiled
lib.
> 
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i got it. the version of activerdf_sparql downloaded by gem
is
1.3.4(updated at 23 sep.), not 1.3.3(updated at 03 sep). so
i downloaded
version 1.3.3 from http://gems.rubyforge.org and finally installed it.

thank you for your help

On Fri, 2007-09-28 at 09:30 +0300, Mikael Lammentausta
wrote:
> Perhaps Benjamin or Eyal knows the exact answer, but I
think the old
> json dependency was dropped just a while ago. Are you
using the latest
> version activerdf_sparql-1.3.3.gem?


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On 28.09.2007, at 04:02, gsofhon wrote:

> but when i tried to install json in jruby on my fedora
pc, an error  
> came
> out said "could not find mkmf.rb" when it
tried to compile json. from
> the jruby mailing list i learned that mkmf.rb is
required for  
> compile c
> files, and jruby cannot load the local compiled lib.


There was a mixup.

Previously I thought that it is possible to specify that the
 
activerdf_sparql gem depends on json_pure with jruby and
json with  
cruby.

Sadly this variable dependency is determined at packaging
time, and  
Eyal uploaded the newest versions, after making them with
cruby.

In the next days I will be releasing new versions of some
parts of  
activerdf and I will make versions of the same gems
available for  
different platforms. (Currently e.g. the hpricot gem can be
installed  
for ruby, mswin32 and jruby. You probably only need to put
the  
plattform name as a suffix to the name of the gem, after the
version  
number. )



cheers, Benjamin. 
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On 09/28/07/09/07 12:19 +0200, Benjamin Heitmann wrote:
> There was a mixup.
Sorry about that. I don't use JRuby myself and thus in my
most recent gem 
upload I installed all gems using cruby. We should indeed
split the jruby 
and the cruby gems, and I will then stay far away from the
jruby stuff in 
order not to break them again.

  -eyal
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