En la versión 4.2.3 se incluye soporte para: ARC, ARM, Blackfin, CRIS, CRX, Darwin, DEC Alpha, DEC Alpha/VMS, FRV, GNU/Linux, H8/300, H8/500, HPPA, IA-64 "Itanium", M32C, M32R/D, MIPS, MMIX, MN10300, Morpho MT, Motorola M680x0, Motorola M68hc1x, Motorola 88000, PA-RISC, PDP-11, PowerPC, RS/6000, Score, SPARC, SuperH, System/370, System 390, System V, TMS320C3x/C4x, V850, VAX, x86, x86-64, Xstormy16, Xtensa, zSeries