EPM on OSX 10.4 and gcc 4

I came up against a problem in the EPM module during the linking of
"setup". I couldn't find mention of it in IssueZilla so I thought I'd
ask here before creating a new issue.

This doesn't happen when I use gcc 3.3, only in gcc 4:

Compiling setup.cxx...
Compiling setup2.cxx...
setup2.cxx: In function 'int install_dist(const dist_t*)':
setup2.cxx:485: warning: 'pid' is used uninitialized in this function
Compiling gui-common.cxx...
Linking setup...
/usr/bin/ld: Undefined symbols:
operator new(unsigned long)
vtable for __cxxabiv1::__class_type_info
vtable for __cxxabiv1::__si_class_type_info
operator delete(void*)
operator delete[](void*)
operator new[](unsigned long)
___cxa_pure_virtual
collect2: ld returned 1 exit status
make: *** [setup] Error 1

I eventually discovered that this is caused by an error in the
Makefile generated by epm's configure script. For some reason it sets
the CXX variable to gcc rather than g++ and manually changing this in
the makefile causes it to succeed.

Unfortunately I don't know enough about the autoconf/automake systems
to know how to change them and create a patch.

Simon