I'm actually using the GCC ARM version for SAM D20/D21/R21 - but I guess it's generic GCC?
Wanting to see the preprocessor output, I added '-save-temps' to the Miscellaneous project options.
It works, but I get this warning:
Warning 1 -pipe ignored because -save-temps specified arm-none-eabi-gcc.exe 0 0 SAMR21_XPRO
So the question is: does the '-pipe' option actually have any significant effect?
This discussion - http://stackoverflow.com/questio... - would seem to suggest that it's generally not significant; what do others here find with Atmel Studio?