C Extension on OSX crashes SU

driven

But it is strange that you can't even load it from IRB...

I'm not very familiar with IRB, so it probably my error.
maybe you could give me more specific instruction...

when I unzip d/l file I put "TT_Hamster.bundle" into my SU plugins folder

in SU Ruby Console I run your .rb code and get

> require 'mkmf'
create_makefile("TT_Hamster")
Error; #<LoadError; (eval);507;in `require'; no such file to load -- mkmf>
(eval);507
(eval);507

so, what am I doing wrong??
john

thomthom

I'm confused - are you using the SU Ruby Console or the IRB to test it?

> require 'mkmf'
Ohhh - now I see. That bit is what I used to compile the extension.

TT_Hamster.bundle is the compiled result of that.
You should only need to
require "TT_Hamster" - this assumes that TT_Hamster.bundle is in the current working directory.

macumber

I checked and have a similar problem. I have only been testing my extension in SketchUp on Windows and IRB on Windows/Mac. I'm going to look into it too and will post anything I find here.

Dan

AdamB

@thomthom said:

I'm confused - are you using the SU Ruby Console or the IRB to test it?

> require 'mkmf'
Ohhh - now I see. That bit is what I used to compile the extension.

TT_Hamster.bundle is the compiled result of that.
You should only need to
require "TT_Hamster" - this assumes that TT_Hamster.bundle is in the current working directory.

You have to link as a flat namespace otherwise it won't work on OSX.

LDSHARED = cc -dynamic -bundle -undefined suppress -flat_namespace

thomthom

I don't know at all what that line actually do, but I replaced what was generated by the extconf.rb file:
LDSHARED = cc -arch ppc -arch i386 -pipe -bundle -undefined dynamic_lookup

Using that line you posted and everything worked great!

I need to work out what it is this does. And how this make system works. I could not even recompile without erasing an .o file that was also generated last time I ran make.

Thank you very much Adam! I owe you a cookie!

thomthom

I notice the old line had something in it, -arch ppc - would that have made it compatible with PPC macs?
I have an old G4 Mac Mini as well as the Intel Mac. Can I compile on the Intel mac in a manner so that the extension will run on both systems?

AdamB

You'll need to add:

"-arch i386 -arch ppc"

to CFLAGS and DLDFLAGS

This will make the Mac compiler build your code for both PowerPC and Intel CPUs.

thomthom

Thanks!

How did you work out that flat namespace is needed for SU Ruby? Since it isn't needed for when you use the normal Ruby?

thomthom

I guess it'd be worth compiling this info into a how-to article...

nikus_knx

@thomthom said:

I guess it'd be worth compiling this info into a how-to article...

Did you do this? I can't found it...

thomthom

@nikus_knx said:

@thomthom said:

I guess it'd be worth compiling this info into a how-to article...

Did you do this? I can't found it...

I got a Hello World project tutorial over at BitBucket:
https://bitbucket.org/thomthom/sketchup-ruby-c-extension

SCF thread related to the tutorial:
http://forums.sketchucation.com/viewtopic.php?f=180&t=41077