"+m" works. We use it. It's better than the alternatives. Pointing to
stale documentation doesn't change anything.
Well, perhaps on i386. I've seen some older versions of the s390 gcc
die
with an ICE because I have used "+m" in some kernel inline assembly.
I'm
happy to hear that this issue is fixed in recent gcc. Now I'll have to
find out if this is already true with gcc 3.x.
It was fixed (that is, "+m" is translated into a separate read
and write by GCC itself) in GCC-4.0.0, I just learnt.
The duplication "=m" and "m" with the same constraint is rather
annoying.
Yeah. Compiler errors are more annoying though I dare say ;-)
Segher
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