C: Assigning structures

suppose we have the following type:

typedef struct {
    int bar;
    int baz;
    int foo;
} Something;

In order to do a copy, I usually do something like:

Something a, b;
...
memcpy ((void *) &a, (const void *) &b, sizeof(Something));
But also the following is legal (and far more quick to write).

Something a, b;
...
a = b;
Is there any disadvantage in doing the second one?

Grr... I can't come up with some scheme to make GCC handle memcpy and = differently when optimizations are enabled.  Not even volatile helped ...

>>38
I want it to use the builtin memcpy, otherwise it's pointless.  I suppose I'll have to dig through the sources.

>>39
Reported for bumping.