> I presume these will be part of the headers for the library > distributed for msp430 gcc by TI/Redhat?
I can't speak for TI's or Red Hat's plans. GNU's typical non-custom embedded runtime is newlib/libgloss, which usually doesn't have that much in the way of chip-specific headers or library functions. > is that for the "critical" attribute that exists in the old msp430 > port (which disables interrupts for the duration of the function)? Yes, for things like that. They're documented under "Function Attributes" in the "Extensions to the C Language Family" chapter of the current GCC manual.
