H8/300 Options#
These -m
options are defined for the H8/300 implementations:
- -mrelax#
Shorten some address references at link time, when possible; uses the linker option
-relax
. See Using ld for a fuller description.
- -mh#
Generate code for the H8/300H.
- -ms#
Generate code for the H8S.
- -mn#
Generate code for the H8S and H8/300H in the normal mode. This switch must be used either with
-mh
or-ms
.
- -mexr#
Extended registers are stored on stack before execution of function with monitor attribute. Default option is
-mexr
. This option is valid only for H8S targets.
- -mno-exr#
Extended registers are not stored on stack before execution of function with monitor attribute. Default option is
-mno-exr
. This option is valid only for H8S targets.
- -mint32#
Make
int
data 32 bits by default.
- -malign-300#
On the H8/300H and H8S, use the same alignment rules as for the H8/300. The default for the H8/300H and H8S is to align longs and floats on 4-byte boundaries.
-malign-300
causes them to be aligned on 2-byte boundaries. This option has no effect on the H8/300.