Support for C++ extension in UNIX builds

I've written a PHP5 extension in C++ that builds great on Linux with GCC, whether I compile it into PHP or build it as a shared library. On Solaris with Sun CC, however, I've had to manually edit the Makefile or the libtool script in order to successfully build my extension. When I compile the extension into PHP, I have to change $(CC) to $(CXX) in certain places in the Makefile. When I build it as a dynamic library, I have to edit libtool so that it uses $(CXX) and not ld to create the shared library. Am I overlooking some configuration step that eliminates the need to manually edit these files? Thanks, - Mark