Mail Archives: djgpp/1999/07/16/02:44:37
> > Is there any way of inserting a marker into C code that is compiled but
> > not run? It would be really helpful if I could put comments (of a sort)
> > right into the binary.
>
> If you don't care exactly where in the binary it ends up, you could just
> do
>
> static char my_comment[] = "Hello, world";
>
> The compiler may warn you about an unused static variable, though.
It would need to be found, so if I did this I would have to put some
unique token at the beginning that coudl not turn up anywhere else.
That's not the best idea...
> > I imagine that maybe I could do it with inline assembly that jumps over
> > a text string, but would the optimizer throw that out?
>
> If you want to have it in just the right place, then yes, you could do
> that. Using `volatile' will prevent the optimizer from moving or
> removing it (in fact I think it might not even be necessary for asms
> with no output).
I heard to use asm volatile from someone else, too. Does this work in C
as well as in C++? I read that the "asm" keyword is new for C++.
However, I see inline assembly in Allegro. Hmm. Is this a deviation
from the standard?
> asm volatile("jmp 0f; .string \"Hello, world\"; 0:");
Is that really jmp 0f?
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