On Wed, Mar 19, 2003 at 01:16:52AM +0100, Thiemo Seufer wrote: > Guido Guenther wrote: > [snip] > > > -march=BAR: > > > Allow opcodes for CPU BAR in addition to the ISA ones. > > > > > > -mtune=BAZ: > > > Optimize opcode scheduling for CPU BAZ. > > So to build kernels for say IP22 R5k I'd change the current > > GCCFLAGS += -mcpu=r5000 -mips2 -Wa,--trap > > to > > GCCFLAGS += -mabi=o32 -march=R5000 -mtune=R5000 -Wa,--trap > > where as for R4X00 I use > > GCCFLAGS += -mabi=o32 -march=R4600 -mtune=R4600 -Wa,--trap > > Correct? > > Yes, this should work. You can leave the -mtune out, since it defaults > to the value of -march anyway. Just for completeness: I had to use: GCCFLAGS += -mabi=32 -march=r4600 -mtune=r4600 -Wa,--trap to make gcc-3.3 happy (note the 32 instead of o32). gcc-3.2 doesn't seem to handle these options correctly at all. -- Guido
