Jam comparison logic is string-based, and so was detecting GCC >= 10 as being < 2. This rectifies that by removing the GCC version parsing from Jam logic entirely, and setting various BuildConfig variables instead. Change-Id: I0c0ae3b9002fb5e77f9ca7a78600c91871657f03 Reviewed-on: https://review.haiku-os.org/c/haiku/+/3293 Reviewed-by: Adrien Destugues <[email protected]> Reviewed-by: Jérôme Duval <[email protected]> Reviewed-by: Alex von Gluck IV <[email protected]>