This is port of Chibios for RL78 MCU, provided by lbednarz http://svn.code.sf.net/p/chibios/svn/branches/rl78_dev.
His demo uses Code:Blocks IDE.
This demo uses GNU/MAKE to compile binary.
Demo is located in demos/RL78-DEMO-GCC It uses gnurl78-elf KPIT toolchain (v14). For details, please refer to this discussion: http://forum.chibios.org/phpbb/viewtopic.php?f=27&t=1623