!9781 adds CI jobs testing IAR toolchains, but leaves out coverage of the RH850 toolchain because it does not work: ``` The C compiler "/opt/iarsystems/bxrh850-3.10.2/rh850/bin/iccrh850" is not able to compile a simple test program. It fails with the following output: ... IAR ELF Linker V3.10.2.2006/LNX for RH850 ... error "layout.icf can not be included directly. Use the device specific linker files instead."; ^ "/opt/iarsystems/bxrh850-3.10.2/rh850/config/layout.icf",10 Error[Lc063]: layout.icf can not be included directly. Use the device specific linker files instead. ```