dlfcn.h error on solaris 10,x86, sunstudio 10

[michael huff]

I get the following error building packages in pkgsrc on my solaris 10
installation using sunstudio 10.
Output follows:
======
checking for unistd.h... yes
checking dlfcn.h usability... yes
checking dlfcn.h presence... no
configure: WARNING: dlfcn.h: accepted by the compiler, rejected by the
preprocessor!
configure: WARNING: dlfcn.h: proceeding with the preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##
checking for dlfcn.h... no
checking for i386-sun-solaris2-g++... CC
checking whether we are using the GNU C++ compiler... no
checking whether CC accepts -g... no
checking dependency style of CC... none
checking how to run the C++ preprocessor... /usr/ccs/lib/cpp
checking for i386-sun-solaris2-g77... f77
checking whether we are using the GNU Fortran 77 compiler... no
=======
Let me know if there's anything you'd like me to do.