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Postings from April 2014
On Sunday-201404-27, 18:37, Karl Williamson wrote:
> The makers of gcc refuse to consider casting to (void) to be a valid way
> of handling the return value of a function which is declared as having
> its return value not ignored.
Had to see this myself... I started up a Linux image [1] and now I see
somewhat more clearly... oh, so, yes it's not so much a gcc issue alone,
though, but an interaction of gcvt() being marked up with the gcc
attribute warn_unused_result (in glibc, I guess). And (void) in gcc
failing to overcome that attribute.
Maybe something like:
#ifdef __GNUC__
#define UNUSED_RESULT(v) ({ typeof(v) z = (v); (void)sizeof(z); })
#else
#define UNUSED_RESULT(v) ((void)(v))
#endif
Or something. No idea how typeof fares across GCC versions (that
solution nicked from stackoverflow, we are not the first to have this
problem).
[1] vagrant in OS X rocks.
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