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.

-ms2600#: Generate code for the H8S/2600. This switch must be used with -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.

-mexr#: Default setting; overrides -mno-exr.

-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.