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Hitachi SH options 

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The following -m options are defined for the Hitachi SH family of processors’  implementations.

-m1
Generate code for the SH1.
-m2
Generate code for the SH2.
-m3
Generate code for the SH3.
-m3e
Generate code for the SH3e.
-mb
Compile code for the processor in big endian mode.
-m1
Compile code for the processor in little endian mode.
-mdalign
Align doubles at 64 bit boundaries. Note that this changes the calling conventions, and thus some functions from the standard C library will not work unless you recompile it first with -mdalign.
-mrelax
Shorten some addresses at link time, when possible; uses the linker option, -relax.