Hi Pekka, For the sake of documenting everything about Emulator, Robot Testing Framework and test cases into the developer mailing list, I am initiating the mailing thread for *Emulator issues on Linux*, then later another thread for *Robot Testing Framework and test cases for Emulator *issues. ... When I build for emulator from path -> ....../Runtime/stm32/build/ through command make PLATFORM=emulator, I get following specific error at Ubuntu command line: *cc1plus: error: unrecognized command line option '-std=c++11'* In my understanding, there might be issues with ... 1- Flags in emulator.mk file at path ....../Runtime/stm32/make/ CFLAGS := \ $(subst -std=c99,-std=c++98,$(subst -mcpu=cortex-m0,,$(call expand,compiler.cmd.cc.flags))) CXXFLAGS := \ $(subst -std=gnu++0x,-std=c++98,$(subst -mcpu=cortex-m0,,$(call expand,compiler.cmd.cxx.flags))) 2- LIBS in emulator.mk file at path ....../Runtime/stm32/make/ LIBS += -lstdc++ 3- Makefile at path ......./Runtime/stm32/build/ PLATFORM ?= arduino # PLATFORM = emulator (why this is commented, uncomment still didn't work with same error) I haven't changed the flags in emulator.mk yet, I wanted to discuss with you first! -- *With Best Regards,Asif Sardar.+358 43 8265795*