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.
-m64bit-doubles
-m32bit-doubles
Make the double data type be 64 bits (-m64bit-doubles)
or 32 bits (-m32bit-doubles) in size. The default is
-m32bit-doubles.