Re: [cc65] Passing variables from asm to c and vice versa

So it's up to the linker to decide whether the expression is constant or not 
?
The compiler must assume, that an external symbol is not constant, because
in c there's no way to tell it explicitely.
Accordingly the compiler inserts the code for the substraction and thus the 
linker step comes
too late to see, that after the substraction the expression had still been 
constant.
Anyway, without arithmetic the decision is made via a constant, correctly.

Monte

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