[MacRuby-devel] REXML

[Matt Aimonetti]

Hi Bob,

 Unfortunately, the gem you are trying to use is based on a C extensions
which doesn't seem to be well written. That's why it doesn't run on Ruby
1.8.7. (and probably not 1.9)

Unfortunately, even if the gem was working fine, it wouldn't currently work
in MacRuby due to a lack of support for C extensions :(

You have a few options,
 1. wait for the next version of MacRuby which should support C extensions.
 2. fix the gem to use FFI instead (so it's compatible with JRuby, MacRuby
etc...
 3. Rewrite the C code in an obj-c wrapper that you load in macruby
 4. use the Cocoa API (I'm personally not familiar with the rs232/serial
API)
 5. something I'm not aware of which would totally solve your problem. (one
can always hope)

My guess is that you'd better off going with 4.

- Matt



On Fri, May 22, 2009 at 1:30 PM, Robert Rice <rice.audio at pobox.com> wrote:

> Matt:
> Thanks for your quick reply.  The hot patch seems to work.
> You may find serialport named as 'ruby-serialport'.
>
> At one time I had serialport working in ruby 1.8.7 but then after
> attempting to install some other Gems I now get the error:
>
> irb 0.9.5(05/04/13)
> new-host:~ robertrice$ ruby -v
> ruby 1.8.7 (2008-08-11 patchlevel 72) [i686-darwin9.7.0]
> new-host:~ robertrice$ irb
> irb(main):001:0> require "rubygems"
> => true
> irb(main):002:0> require "serialport"
> [BUG] cross-thread violation on rb_gc()
> ruby 1.8.6 (2008-08-11) [universal-darwin9.0]
>
> Abort trap
> new-host:~ robertrice$ exit
> logout
>
> [Process completed]
>
> Could you suggest a fix for this?
>
> Thanks,
> Bob Rice
>
>
> On May 22, 2009, at 12:59 PM, Matt Aimonetti wrote:
>
> For XML, you can use Cocoa API or if you want to ue REXML, you need to use
> the hot patch I mentioned there:
>
> http://www.macruby.org/trac/ticket/134
>
> Regarding the serialport library, I can't seem to see it on rubyforge, so
> I'm not sure what you are referring to.
>
> - Matt
>
> On Fri, May 22, 2009 at 9:44 AM, Robert Rice <rice.audio at pobox.com> wrote:
>
>> Dear MacRuby development team:
>>
>> I am new to Ruby and I have an application that I would like to port to
>> MacRuby. The two extensions I will need are XML and serial port I/O.
>> So far I have not been able to get them to work:
>>
>> Last login: Fri May 22 12:31:48 on ttys000
>> new-host:~ robertrice$ macirb
>> >> require "rexml/document"
>> NameError: uninitialized constant REXML::Attribute::NAME_STR
>>        from
>> /Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/rexml/attribute.rb:18:in
>> `<class:Attribute>'
>>        from
>> /Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/rexml/attribute.rb:9:in
>> `<module:REXML>'
>>        from
>> /Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/rexml/attribute.rb:4:in
>> `<top (required)>'
>>        from
>> /Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/rexml/element.rb:3:in
>> `require'
>>        from
>> /Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/rexml/element.rb:3:in
>> `<top (required)>'
>>        from
>> /Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/rexml/document.rb:1:in
>> `require'
>>        from
>> /Library/Frameworks/MacRuby.framework/Versions/0.4/usr/lib/ruby/1.9.1/rexml/document.rb:1:in
>> `<top (required)>'
>>        from (irb):1:in `require'
>>        from (irb):1
>>        from /usr/local/bin/macirb:12:in `<main>'
>> >> require "rubygems"
>> => false
>> >> require "serialport"
>> LoadError: no such file to load -- serialport
>>        from (irb):3:in `require'
>>        from (irb):3
>>        from /usr/local/bin/macirb:12:in `<main>'
>> >> exit
>> new-host:~ robertrice$ exit
>> logout
>>
>> [Process completed]
>>
>> Can anyone help me? Do I have a bad installation of MacRuby?
>>
>> Thanks,
>> Bob Rice
>> _______________________________________________
>> MacRuby-devel mailing list
>> MacRuby-devel at lists.macosforge.org
>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>>
>
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