Re: [avr-gcc-list] memcpy() : problem when passing destination pointer

[Graham Davies]

Vincent Trouilliez wrote:
... get a warning about the destination pointer:
... passing argument 1 of ‘memcpy’ discards qualifiers from pointer target 
type

Well, this is a pretty clear warning.  Look at what you're passing to 
memcopy as argument 1 and then look for any type qualifiers in its 
declaration.  Ahah! "volatile".  Does formal argument 1 of memcpy have the 
volatile qualifier?  No.  Therefore, you're discarding it from the actual 
argument.  That is, inside memcpy, the variable is no longer being treated 
as volatile.  How you fix this depends on whether you care or not.  If you 
need to preserve the volatile treatment, you'll have to write a replacement 
for memcpy.  If you can let it go, just use an explicit cast.

Graham.