Warnung: »packed« attribute ignored for field of type »byte«

[Sebastian Biallas]

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Hello!

I'm using "__attribute__((packed))" for the elements of a struct so that
gcc doesn't add padding. The structs are somehow machine generated, so
all elements have this. When using gcc-4.1.0 with -Wall I get a lot of

Warning: »packed« attribute ignored for field of type »byte«

What exactly is the reason of this warning? It just clobbers gcc output
and has no real helpful meaning. So, maybe gcc always puts bytes on an
unaligned address and the "packed"-attribute is superfluous, but: I
don't care and maybe other compilers have a different opinion about that..

Am I missing something? What is this warning good for except making code
generation harder?

Sebastian


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