Re: [avr-gcc-list] Feature request - compiler warning for "if" stmts that do nothing

[Douglas Dotson]

I agree that one should not tolerate any warning
messages. Folks tend to ignore them and on the
occasion that the warning is actually indicating
a real problem, it might be ignored.
 
> while ((SPSR & (1 << SPIF)) = 0)
>  ;
> would be an error that some compilers say nothing
> about.

I think any compiler would generate on this
because the assignment is trying to assign a
constant to an RVALUE isn't it?
 
> The compiler will always barf if the constant is on
> the left because
> you can not assign a value to a constant.
> 
> 
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