Hi,
Am 03.10.2014 09:46 schrieb "陳韋任 (Wei-Ren Chen)" <che...@cs.nctu.edu.tw>:
>
...
> So I want to know what "-p" option's role here. Does it affect any
> compiler behavior or codegen?
At least the Microchip PIC ports use -p to inform the compiler about
available IO and memory banks to generate correct and somewhat efficient
code for the device by avoiding BANKSEL instruction where not needed, by
allowing to check config bits, and before the introduction of the #pragma
config to tell the compiler the device (family) specific address if the
config word(s).
I think that other ports do not use (but need) -p at all.
Raphael
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