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ARM Options
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-mcpu=name (Emit assembly for CPU)
This specifies the name of the target ARM processor. GCC uses this
name to determine what kind of instructions it can emit when gener‐
ating assembly code. Permissible names are: arm2, arm250, arm3,
arm6, arm60, arm600, arm610, arm620, arm7, arm7m, arm7d, arm7dm,
arm7di, arm7dmi, arm70, arm700, arm700i, arm710, arm710c, arm7100,
arm7500, arm7500fe, arm7tdmi, arm7tdmi-s, arm8, strongarm, stron‐
garm110, strongarm1100, arm8, arm810, arm9, arm9e, arm920, arm920t,
arm922t, arm946e-s, arm966e-s, arm968e-s, arm926ej-s, arm940t,
arm9tdmi, arm10tdmi, arm1020t, arm1026ej-s, arm10e, arm1020e,
arm1022e, arm1136j-s, arm1136jf-s, mpcore, mpcorenovfp,
arm1156t2-s, arm1176jz-s, arm1176jzf-s, cortex-a8, cortex-r4, cor‐
tex-m3, xscale, iwmmxt, ep9312.
-mtune=name (Tune for CPU)
This option is very similar to the -mcpu= option, except that
instead of specifying the actual target processor type, and hence
restricting which instructions can be used, it specifies that GCC
should tune the performance of the code as if the target were of
the type specified in this option, but still choosing the instruc‐
tions that it will generate based on the cpu specified by a -mcpu=
option. For some ARM implementations better performance can be
obtained by using this option.
-march=name (Architecture level)
This specifies the name of the target ARM architecture. GCC uses
this name to determine what kind of instructions it can emit when
generating assembly code. This option can be used in conjunction
with or instead of the -mcpu= option. Permissible names are:
armv2, armv2a, armv3, armv3m, armv4, armv4t, armv5, armv5t,
armv5te, armv6, armv6j, armv6t2, armv6z, armv6zk, armv7, armv7-a,
armv7-r, armv7-m, iwmmxt, ep9312. ......
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