Make of WSO2-WSF-Perl-1.1 on OSX 10.5 fails

I'm getting an error when trying to make the Perl module: when using make to build WSO2-WSF-Perl-1.1 I get the following: /usr/include/dlfcn.h:61: error: syntax error before ‘dlopen_preflight’ In file included from /opt/wsfc/include/axis2-1.4.0/platforms/unix/axutil_unix.h:75, from /opt/wsfc/include/axis2-1.4.0/platforms/axutil_platform_auto_sense.h:51, from /opt/wsfc/include/axis2-1.4.0/axutil_dll_desc.h:31, from /opt/wsfc/include/axis2-1.4.0/axutil_class_loader.h:31, from /opt/wsfc/include/axis2-1.4.0/axis2_util.h:24, from /opt/wsfc/include/axis2-1.4.0/neethi_includes.h:22, from /opt/wsfc/include/axis2-1.4.0/neethi_operator.h:29, from /opt/wsfc/include/axis2-1.4.0/neethi_policy.h:29, from /opt/wsfc/include/axis2-1.4.0/axis2_svc_client.h:56, from WSFC_wrap.c:1506: /usr/include/dlfcn.h:61: error: syntax error before ‘dlopen_preflight’ lipo: can't open input file: /var/folders/DF/DFh1qoe3HcWQ2vT5F5vP6U+++TI/-Tmp-//ccfJUgDh.out (No such file or directory) make: *** [WSFC_wrap.o] Error 1 I was able to build and install WSFC just fine. I'm using Xcode 3 and gcc is version 4.0.1 Any ideas?