On Wed, 8 Aug 2012, Frederic Koehler wrote:
> Definitely nobody should use mkstemp anyway, but it's worth noting why the
> segfault happens, because it's tricky: the code calls basename but forgets
> to include the right header file -- this being C, the compiler just assumes
> its return type is int. However int is on x64 a 32 bit integer, so the
> pointer gets trashed (with a cltq instruction that gcc inserts to "extend"
> int's sign bit).
>
> These implicit definitions are probably the main issue with 64-bit right
> now (guessing). They can be caught by -Wall though. My next email will
> include a patch for some of these fixes, enough to get into a (severely
> broken) CDE instance.
>
There are a lot of these types of issues... Might not be a bad idea
someday to enable gcc's 'error out on missing prototypes' feature and
get these all fixed. Would be painful, but neccessary.
[...]
--
Jon Trulson
"If the Martian rope-a-dope don't get him, he'll get himself, he'll
come in too fast and punch himself out."
- one of my brothers, referring to the Curiosity landing.
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