H8/300 Options (Using the GNU Compiler Collection (GCC)) (original) (raw)

3.20.19 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 ld and the H8/300 in 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.

-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.