Hi Florian, On Wed, 2013-01-09 at 12:56 +0100, Florian Weimer wrote: > On 01/09/2013 11:42 AM, michaelr wrote: > > > i run into a strange problem which i can't solve alone. The complete > > projects builds fine (no errors or warnings) but the programm will > > not start afterwards because one library (-lboost_date_time) is simply > > not present when i run ldd on it. > > What's the error message when you try to start the program? > > (Not sure if this is actually a GCC problem, though.) > the message is: /usr/local/apache/modules/mod_wscmi.so undefined symbol: _ZNK5boost9gregorian10greg_month15as_short_stringEv it's undefined because the complete library is not linked into the binary i think.