Compiler options

When you run GCC, you can use command-line options to choose machine-specific details. For information on all the GCC command-line options, see section `GNU CC Command Options' in Using GNU CC.

General Options

-mh

Generate code for the H8/300H chip.

-mint32

Use 32 bit integers when compiling for the H8/300H.

Floating point subroutines

Two kinds of floating point subroutines are useful with GCC:

1. Software implementations of the basic functions (floating-point multiply, divide, add, subtract), for use when there is no hardware floating-point support.
2. General-purpose mathematical subroutines. The Developer's Kit from Cygnus Support includes an implementation of the standard C mathematical subroutine library. See section `Mathematical Functions' in The Cygnus C Math Library.