default for FreeBSD. The standard exception implementation reliably
dumps core under FreeBSD. Users can put "-fno-sjlj-exceptions" on
the command line if they really want to override the new default.
Configure with "--with-gnu-as" and "--with-gnu-ld".
Define "__FreeBSD__" as 3.
like "enhanced GNU compiler suite." It contains updated versions of
gcc, g++, and g77 with many bugfixes and some new optimizations.
The C++ compiler in particular is vastly improved over gcc-2.7.2.1.
