I read the directions on how to make calendar.so multiple times. I made calendar.so succesfully. Then followed these directions. I have done this now for about 6 hours over and over. I keep getting the same error.  Can't find calendar.co blah, blah, blah. I have read the mailing lists also. Any suggestions, I really need some help.

To use extensions on your OS, you will need to recompile PHP.
You need to edit the Makefile in the php3 directory and add
-rdynamic to the start of the LDFLAGS line at the top of the
Makefile.  Then type: 'make clean; make'
You can still go ahead and build the extensions now by typing
'make' in this directory.  They just won't work correctly
until you recompile your PHP.
If you are compiling php as a module, you should also add
-rdynamic to the start of the EXTRA_LDFLAGS in apaches
Configuration file.