link to fsock.o fails

As I mentioned earlier I was going to use php_fsockopen from fsock.c When the make process tries to link it complains that my module references and undefined symbol php_fsockopen - but this is part of fsock.c, I have also configured with --enable-socket However, there are no complaints that my module tries to use the function php_file_le_socket() from file.c It is not true php_fsockopen is not being linked in; yet the .o file is being created - I can't find any ifdef's that would comment out some of the code to cause the missing symbols and failed link, and when I do compile, the fsockopen function is present! Why can't I use fsockopen from my own module? Sam