I still get this error:

/usr/src/lib/libc/gen/err.c:51: stdarg.h: No such file or directory


There are several symbolic links in /usr/include which apparently are
no longer getting installed (stdarg.h, varargs.h, float.h, frame.h) to point
to machine/<header>.  Has someone made it impossible to build with gcc before
making egcs the actual default?