suggest that I include the answer here.
+Compilers and Portability
+=========================
+
+Flight Gear is known to build with egcs-1.1 and higher, as well as
+gcc-2.8 and higher. Your mileage may vary with earlier versions of
+these compilers although support for gcc-2.7.x is mostly there.
+
+For other platforms where you may have access to native compilers,
+again your mileage may vary. We would like to support as many
+different compilers and platforms as possible. Please relay any
+changes you make (or problems you encounter) back to
+curt@flightgear.org, so that in the future we can better support your
+platform and your compiler. I have access to a few different
+platforms, but I must depend on others to make sure their favorite
+platform and compiler is well supported.
+
+
GLUT
====