GCC with XScale and ARMv5TE

Question

Why am I getting the following gcc (4.6.1) warning?

warning: switch -mcpu=xscale conflicts with -march=armv5te switch
[enabled by default]

The "Intel XScale Core Developer's Manual" states:

The Intel XScale® core implements the integer instruction set architecture specified in ARM V5TE.

EDIT: The GCC manual states the following about the -march= option:

This option can be used in conjunction with or instead of the -mcpu= option.

So these two switches can be used together. The problem lies therefore in the values (xscale and amrv5te). So why such a conflict between these two values?

I'm not sure, but, is there an march options for xscale instead? — slugonamission, Nov 14 '11 at 00:04

score 3 · Answer 1 · answered Nov 14 '11 at 10:35

3

In GCC there's a set of flags, describing the each supported ISA architecture and each supported implementation (core). GCC does a basic consistency check between -mcpu and -march options to verify that the set of flags are the same (except the flags, which affect only tuning and not ISA).

Do not use -mcpu, use -march=armv5te -mtune=xscale.

answered Nov 14 '11 at 10:35

chill

16,470
2
40
44

I know of the consistency checks... Why is my combination inconsistent? The XScale _is_ ARMv5TE... – Mircea Nov 14 '11 at 11:55

GCC with XScale and ARMv5TE

1 Answers1