gcc 2.7 can't handle a few warning options that gcc 2.95 can.

         dnl -Wcast-align is a bit too annoying on all gcc versions ;-)

         if test "$gccnum" -ge "207"; then

           dnl gcc 2.7 or later (well, they don't work on 2.2.2)

           WARN="$WARN -Wno-long-long -Wmissing-declarations -Wsign-compare"

           dnl gcc 2.7 or later

           WARN="$WARN -Wmissing-declarations"

         fi

         if test "$gccnum" -gt "295"; then

           dnl only if the compiler is newer than 2.95 since we got lots of

           dnl "`_POSIX_C_SOURCE' is not defined" in system headers with

           dnl gcc 2.95.4 on FreeBSD 4.9!

           WARN="$WARN -Wundef"

           WARN="$WARN -Wundef -Wno-long-long -Wsign-compare"

         fi

         if test "$gccnum" -ge "296"; then