MonetDB extension

Hi, I guess I should introduce myself first: I'm Manfred Stienstra, I'm a parttime web application programmer and parttime student Artificial Intelligence. I was asked by a teacher to create a php api for MonetDB [1], I started working on that today, and I can't find out how to create a dynamic loadable extension. The code I'm using is the standard code from ext_skel. I've tried this: gcc -fpic -DCOMPILE_DL=1 -I/usr/local/include -I. -I.. -I ../.. -I../../Zend -I../../include -I../../main -I../../TSRM -c -o monet.o monet.c ld --export-dynamic -shared -L/usr/lib -o monet.so monet.o but php gives this error: Warning: dl(): Invalid library (maybe not a PHP library) 'monet.so' in /var/www/tail.dwerg.net/htdocs/monet/index.php on line 3 Is there some way to use the php build structure to create dynamic loadable extensions or does someone know how to fix this? Manfred Stienstra [1] http://monetdb.cwi.nl