[CentOS] Having problems compiling program

I get the errors:
zip4_lnx.a(generic.o)(.text+0xb16): more undefined references to
`__ctype_b' follow
zip4_lnx.a(libdl.so): undefined reference to `_dl_close at GLIBC_2.0'
zip4_lnx.a(libdl.so): undefined reference to `_dl_catch_error at GLIBC_2.0'
zip4_lnx.a(libdl.so): undefined reference to `_dl_addr at GLIBC_2.0'
zip4_lnx.a(libdl.so): undefined reference to
`_dl_lookup_versioned_symbol_skip at GLIBC_2.0'
zip4_lnx.a(libdl.so): undefined reference to
`_dl_lookup_versioned_symbol at GLIBC_2.0'
zip4_lnx.a(libdl.so): undefined reference to `_dl_lookup_symbol at GLIBC_2.0'
zip4_lnx.a(libdl.so): undefined reference to `_dl_loaded at GLIBC_2.1'
zip4_lnx.a(libdl.so): undefined reference to `_dl_open at GLIBC_2.0'
zip4_lnx.a(libdl.so): undefined reference to `_dl_signal_error at GLIBC_2.0'
zip4_lnx.a(libdl.so): undefined reference to `_dl_global_scope at GLIBC_2.0'
zip4_lnx.a(libdl.so): undefined reference to `_dl_lookup_symbol_skip at GLIBC_2.0'

I have the compatibility libraries installed. I have tried using
gcc296, gcc, and gcc4 and still get the message. The
library,libdl.so.2 is in /lib with a symlink to /usr/lib/libdl.so
Using CentOS 4.0.

-- 
If the sane say the insane are insane, 
What if the sane are insane?
Would that make the insane sane? 
Explains a lot in Washington!
  --E. Croft