These options are defined specifically for the FR30 port.
-msmall-model
Use the small address space model. This can produce smaller code, but it does assume that all symbolic values and addresses fit into a 20-bit range.
-mno-lsim
Assume that runtime support has been provided and so there is no need to include the simulator library (libsim.a) on the linker command line.
© Free Software Foundation
Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-7.3.0/gcc/FR30-Options.html