WIP: IAR updates
-Attempt to make improve the support for IAR compilers and make it easier to add support for new target compilers
-Added support for IAR targets RX, and MSP430
CMAKE_C_COMPILER_INTERNAL_VERSIONwhich gets its value from the predefined symbol
TODO: No errors when building but the new variable does not seem to get any value.
Status: -ARM builds fine
-The RX assembler fails due to that the regexp in file
CMakeDetermineASMCompiler.cmake looks at the assembler sign-on message to determine the architecture. Not a stable solution as the sign-on message differs between different IAR assemblers. The regexp needs to be updated or to find another solution:
ARM sign-on: IAR Assembler V188.8.131.5250/W32 for ARM
RX sign-on: IAR Assembler V184.108.40.20605 for Renesas RX
-AVR and MSP430 fails in compiling due to that the -c option is invoked in the compiler command line, probably due some fallback.