I don't use xcode to compile. We use a GNU makefile. I try to link those library : boost_thread and boost_regex. Le 9 févr. 06, à 16:55, RIVASSEAU Jean Noel a écrit : Arial0000,0000,8080Do you develop in XCode ? I remember that while developing on XCode there is an option that does fast linking (it is called Zero Link) and if you check that, it does not really link your application at link time but only at run time. Arial0000,0000,8080  Arial0000,0000,8080So I think this is in fact a linking problem, disable the Zero Link option under XCode and your code will probably fail to link. Arial0000,0000,8080  Arial0000,0000,8080As to why it does not link, I do not know, which library (boost) are you trying to link to ? Arial0000,0000,8080  Arial0000,0000,8080Jean-Noël Arial0000,0000,8080  Arial0000,0000,8080  Arial0000,0000,8080  TahomaDe :Tahoma boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] De la part de Locatelli Jérôme TahomaEnvoyé :Tahoma jeudi 9 février 2006 14:14 TahomaÀ :Tahoma boost-users@lists.boost.org TahomaObjet :Tahoma [Boost-users] pd darwin Symbol not found Times New Roman  Times New RomanI'am writing a application on MacOS 10.4.4 using darwin 8 with gcc 4, I compile and link my application without problem but when I run my application , I've got the error bellow. Has anybody got an idear?? Times New Roman  Times New RomanThanks. Times New Roman  Times New Romandyld: lazy symbol binding failed: Symbol not found: __ZN5boost6detail3tss4initEPNS_9function1IvPvSaINS_13function_baseEEEE Times New RomanReferenced from: /Users/locatelli/Projets/ics/IcsServer/obj.ics/../lib/libIcsServerCommandSystem.0 Times New RomanExpected in: flat namespace Times New Roman  Times New Romandyld: Symbol not found: __ZN5boost6detail3tss4initEPNS_9function1IvPvSaINS_13function_baseEEEE Times New RomanReferenced from: /Users/locatelli/Projets/ics/IcsServer/obj.ics/../lib/libIcsServerCommandSystem.0 Times New RomanExpected in: flat namespace Times New Roman  Times New RomanTrace/BPT trap Times New Roman  Times New Roman--------------------------------------------------- Times New RomanLocatelli Jérôme Times New RomanInstitut Laue-Langevin Times New RomanService Contrôle des instruments Times New Roman6 rue Jules Horowitz, BP 156 Times New Roman38042 Grenoble cedex 9 Times New Romanhttp://www.ill.fr/ Times New RomanTel: 33 (0)4 76 20 76 27 Times New RomanFax: 33 (0)4 76 20 77 00 Times New Roman--------------------------------------------------- _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users --------------------------------------------------- Locatelli Jérôme Institut Laue-Langevin Service Contrôle des instruments 6 rue Jules Horowitz, BP 156 38042 Grenoble cedex 9 http://www.ill.fr/ Tel: 33 (0)4 76 20 76 27 Fax: 33 (0)4 76 20 77 00 ---------------------------------------------------