David Edelsohn wrote:
Yaro Pollak writes:
I am cross-compiling on GCC 3.4.1 for the PowerPC 405, which can handle
unaligned accesses in hardware.
Whenever I am accessing members of a packed bit-struct by pointer, the
compiler produces byte accesses, instead of 4-byte acceses.
I've tried to use |-mstrict-align but to no avail.
What does "|-mstrict-align" mean? -mstrict-align means "do not
assume that unaligned accesses are handled by the system." You are
requesting that the compiler assume the target requires strict alignment
and then questioning why it is accessing a packed bit-struct assuming the
least alignment.
David
Yes, I actually couldn't tell whether I should use -mno-strict-align or
-mstrict-align from the explanation in GCC documentation (thank you for
your explanation) so I tried both, but it didn't matter at all. I guess
I should have mentioned that before. Perhaps any other ideas? I feel it
is something fundamental that I keep missing.
Yaro
