Protect gcc extension _builtin_expect with GCC version >= 3 because old gcc versions (up to 2.95.3 it seems) did not have that extension.
Protect gcc extension _builtin_expect with GCC version >= 3 because old gcc versions (up to 2.95.3 it seems) did not have that extension.

ivankelly/gambit,ivankelly/gambit,jasperla/gambit,BeImprovised/gambit,BeImprovised/gambit,thewhimer/gambit,acenode/gambit,jasperla/gambit,jasperla/gambit,BeImprovised/gambit,thewhimer/gambit,ivankelly/gambit,thewhimer/gambit,thewhimer/gambit,BeImprovised/gambit,acenode/gambit,acenode/gambit,acenode/gambit,jasperla/gambit,thewhimer/gambit,thewhimer/gambit