It's actually worse than that. The test can give incorrect results even for
the current machine. e.g.:
void foo(float * p) // assume p is misaligned
{
*p = 0; // first store
frob(0);
*p = 0; // second store
}
It is possible for the first store to succeed and the second to cause an
alignment fault (or vice-versa).
--
[armel] the ./H5detect test segfaults when built for armv7
https://bugs.launchpad.net/bugs/635199
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