From: Akimichi Tatsukawa <akimichi@...>
Date: 2003-03-03T00:44:57+09:00
Subject: Re: LibNeural on OS X: undefined symbols

Hi, I'm Akimichi Tatsukawa, the author of LibNeural.
It seems to me that linking to the standard C++ library is not properly done.
In the file 'ext/LibNeural/extconf.rb', check out the following option
if it is proper or not under your environment.

$LDFLAGS = "-L/usr/lib -lstdc++"

I don't know about Mac, so I might give your a wrong advice.


At Sat, 1 Mar 2003 06:05:50 +0900,
Dave Dembinski wrote:
> 
> Running OS X 10.2.4, trying to make use of Akimichi Tatsukawa's
> LibNeural package.  I downloaded Swig 1.3.9 and built it from source
> (it's the version listed on the LibNeural page as having been used to
> test it), with no errors I could see.  The LibNeural package also
> built with no errors, but when I ran the test scripts I got a whole
> mess of undefined symbol errors like so:
> 
> ruby odd_even.rb
> dyld: ruby Undefined symbols:
> __ZNSi7getlineEPcic
> __ZNSiC4EPSt15basic_streambufIcSt11char_traitsIcEE
> __ZNSiD4Ev
> __ZNSirsERf
> __ZNSirsERi
> __ZNSoC4EPSt15basic_streambufIcSt11char_traitsIcEE
> __ZNSoD4Ev
> __ZNSolsEPFRSoS_E
> __ZNSolsEd
> __ZNSolsEl
> __ZNSolsEm
> __ZNSt13basic_filebufIcSt11char_traitsIcEE4openEPKcSt13_Ios_Openmode
> __ZNSt13basic_filebufIcSt11char_traitsIcEE5closeEv
> __ZNSt13basic_filebufIcSt11char_traitsIcEEC1Ev
> __ZNSt13basic_filebufIcSt11char_traitsIcEED4Ev
> __ZNSt8ios_base4InitC1Ev
> __ZNSt8ios_base4InitD1Ev
> __ZNSt8ios_baseC2Ev
> __ZNSt8ios_baseD2Ev
> __ZNSt9basic_iosIcSt11char_traitsIcEE4initEPSt15basic_streambufIcS1_E
> __ZNSt9basic_iosIcSt11char_traitsIcEE5clearESt12_Ios_Iostate
> __ZNSt9basic_iosIcSt11char_traitsIcEED4Ev
> __ZSt4cout
> __ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
> __ZSt9terminatev
> __ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc
> __ZStrsIcSt11char_traitsIcEERSt13basic_istreamIT_T0_ES6_PS3_
> __ZTTSt14basic_ifstreamIcSt11char_traitsIcEE
> __ZTTSt14basic_ofstreaTrace/BPT trap
> 
> Has anyone run into anything similar on OS X or anywhere else for that
> matter?  I searched the newsgroup but the only thing I found relating
> to LibNeural was a release announcement.
> 
> Thanks, 
> _dave
> 
>