C++ porting notes-----------------I originally wrote this code using gcc/g++ as the compiler.Below is a list of changes I had to make to accomodate SGI, Sun and Intel C++compilers.o Explicitly instantiate templates only in g++ (#ifdef __GNUG__).o Avoid global static data referenced by template code. These symbols  become undefined in the instantiated template functions.  I use local static data, or global extern data instead (the latter  #ifndef __GNUG__).o Avoid non-static inline functions in templates (.cc files).  They  don't get properly instantiated by Sun CC and result in undefined  symbols.o Use Sun CC -xar option to build libraries. This includes needed  template instances in the library (see the new $(ARCHIVE) macro to  refer to the appropriate archive command).o To work around an internal compiler error in gcc 2.7.2, I had to  add empty destructors in a few classes. Howver, I no longer use gcc 2.7.2  in testing, so current version are no longer guaranteed to work with it.o Intel C++ doesn't support arrays of non-POD objects on the stack.  I had  to replace those with matching calls to new/delete.Compilers that work-------------------(as of last checking, meaning current versions may not work out of the box)+ gcc/g++ 2.8.1, 2.95.3, 3.2 and 3.3+ Sun SC4.0+ SGI NCC+ Intel C++ 7.1Compilers that don't work on this code--------------------------------------- Sun SC3.0.1- CenterLine (Sun version, as of 6/96)