I'm trying to write a ruby extension which accesses the AddressBook.framework on OS X. I can get the extension to compile but get undefined symbol errors for each of the AddressBook APIs when I load the extension. It's pretty clear that it's not able to find the AddressBook library module, but I'm not quite sure how to tell it where to look. Anyone have any experience with accessing OS X frameworks in this way?
Dave Craine
InfoEther
You could try adding
$LDFLAGS = '-framework AddressBook'
into you extconf.rb file.
Dave.
On 22 Dec 2004, at 15:06, David Craine wrote:
I'm trying to write a ruby extension which accesses the AddressBook.framework on OS X. I can get the extension to compile but get undefined symbol errors for each of the AddressBook APIs when I load the extension. It's pretty clear that it's not able to find the AddressBook library module, but I'm not quite sure how to tell it where to look. Anyone have any experience with accessing OS X frameworks in this way?
Dave Craine
InfoEther
In case it is of help, RubyCocoa is able to access the Address Book. See:
http://www.fobj.com/rubycocoa/doc/faq.en.html
I haven't tested it myself though.
Marshall
On Dec 22, 2004, at 7:06 AM, David Craine wrote:
I'm trying to write a ruby extension which accesses the AddressBook.framework on OS X. I can get the extension to compile but get undefined symbol errors for each of the AddressBook APIs when I load the extension. It's pretty clear that it's not able to find the AddressBook library module, but I'm not quite sure how to tell it where to look. Anyone have any experience with accessing OS X frameworks in this way?
Dave Craine
InfoEther
Generally you need to link in the framework with some flag (probably
-framework <framework> or -Wl,-framework -Wl,<farmework>) during link.
Since LDFLAGS are not supported you should put this to DLDFLAGS.
You can try to build the extension with the ruby from fink which does
not suppress undefined symbols and would not link an extension without
the required libraries.
HTH
Michal Suchanek
On Thu, Dec 23, 2004 at 12:06:04AM +0900, David Craine wrote:
I'm trying to write a ruby extension which accesses the
AddressBook.framework on OS X. I can get the extension to compile but
get undefined symbol errors for each of the AddressBook APIs when I
load the extension. It's pretty clear that it's not able to find the
AddressBook library module, but I'm not quite sure how to tell it where
to look. Anyone have any experience with accessing OS X frameworks in
this way?
Thanks Dave. That got me past the initial linking error. I am getting
another linking error apparently when it tries to lookup NSObject. I tried
adding "-framework Foundation.framework" to the LDFLAGS setting as well but
that didn't seem to help. Any additional thoughts?
Dave
-----Original Message-----
From: Dave Baldwin [mailto:dave.baldwin@3dlabs.com]
Sent: Wednesday, December 22, 2004 10:48 AM
To: ruby-talk ML
Subject: Re: Ruby Extensions using OS X Frameworks
You could try adding
$LDFLAGS = '-framework AddressBook'
into you extconf.rb file.
Dave.
On 22 Dec 2004, at 15:06, David Craine wrote:
I'm trying to write a ruby extension which accesses the
AddressBook.framework on OS X. I can get the extension to compile but
get undefined symbol errors for each of the AddressBook APIs when I
load the extension. It's pretty clear that it's not able to find the
AddressBook library module, but I'm not quite sure how to tell it
where to look. Anyone have any experience with accessing OS X
frameworks in this way?Dave Craine
InfoEther
Thanks for the help. I've actually used the -framework option to specify the AddressBook framework, and I'm able to compile, however, when I try to use the extension in a test script I get the following errors:
objc: failed objc_getClass(NSObject) for ABAllGroup->isa->isa
objc: please link appropriate classes in your program
Trace/BPT trap
Here is the output generated by the make file:
gcc -fno-common -g -O2 -pipe -I. -I/usr/local/lib/ruby/1.8/powerpc-darwin -I/usr/local/lib/ruby/1.8/powerpc-darwin -I. -c RubyABWrapper.c
cc -dynamic -bundle -undefined suppress -flat_namespace -framework AddressBook -framework Carbon -L"/usr/local/lib" -o AddressBook.bundle RubyABWrapper.o -ldl -lobjc
ld: warning -prebind has no effect with -bundle
I'm specifying both the AddressBook framework and the Carbon Framework. The hangup appears to be in locating the library that has the NSObject, which is somewhat confusing to me because my extension is built to use the C API for the AddressBook and not the Objective-C API. Below is the code for the extension (it's short because I'm just trying to test it out right now):
#include "ruby.h"
#include <AddressBook/ABAddressBookC.h>
#include <AddressBook/ABGlobalsC.h>
VALUE abWrapper;
ABAddressBookRef sharedABRef;
static VALUE t_init(VALUE self)
{
//add other initialization code here
sharedABRef= ABGetSharedAddressBook();
return self;
}
static VALUE t_getMe(VALUE self)
{
ABPersonRef personRef;
personRef = ABGetMe(sharedABRef);
}
void Init_RubyABWrapper()
{
abWrapper = rb_define_class("RubyABWrapper", rb_cObject);
rb_define_method(abWrapper, "initialize", t_init, 0);
rb_define_method(abWrapper, "getMe", t_getMe, 0);
}
I've created a simple test script that looks like this:
require 'AddressBook'
t = RubyABWrapper.new
t.getMe
The objc: failed objc_getClass(NSObject) for ABAllGroup->isa->isa error seems to occur when the AddressBook extension is loaded since I can comment out the remaining lines of the script and the error still occurs.
Again, any help/insights would be greatly appreciated.
Dave C.
On Jan 3, 2005, at 7:09 AM, Michal 'hramrach' Suchanek wrote:
On Thu, Dec 23, 2004 at 12:06:04AM +0900, David Craine wrote:
I'm trying to write a ruby extension which accesses the
AddressBook.framework on OS X. I can get the extension to compile but
get undefined symbol errors for each of the AddressBook APIs when I
load the extension. It's pretty clear that it's not able to find the
AddressBook library module, but I'm not quite sure how to tell it where
to look. Anyone have any experience with accessing OS X frameworks in
this way?Generally you need to link in the framework with some flag (probably
-framework <framework> or -Wl,-framework -Wl,<farmework>) during link.
Since LDFLAGS are not supported you should put this to DLDFLAGS.You can try to build the extension with the ruby from fink which does
not suppress undefined symbols and would not link an extension without
the required libraries.HTH
Michal Suchanek