3.17.37 RL78 Options

-msim
Links in additional target libraries to support operation within a simulator.
-mmul=none
-mmul=g13
-mmul=rl78
Specifies the type of hardware multiplication support to be used. The default is none, which uses software multiplication functions. The g13 option is for the hardware multiply/divide peripheral only on the RL78/G13 targets. The rl78 option is for the standard hardware multiplication defined in the RL78 software manual.

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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-4.9.3/gcc/RL78-Options.html