Cross-compilation is now supported for Renesas RX targets with the CC-RX compiler.
The environment path should be set properly for the CC-RX compiler executables. The -cpu option with the appropriate value should be mentioned in the cross-file as shown in the snippet below.
[properties] c_args = ['-cpu=rx600'] cpp_args = ['-cpu=rx600']
The default extension of the executable output is .abs. Other target specific arguments to the compiler and linker will need to be added explicitly from the cross-file(c_args/c_link_args/cpp_args/cpp_link_args) or some other way. Refer to the CC-RX User's manual for additional compiler and linker options.