Thu Dec 22 20:14:00 GMT 2016
On 12/22/2016 01:39 PM, Marco Atzeri wrote:
> Hi guys,
> building latest Imagemagick, the test for ssize_t is now failing with a
> $ gcc ssize_t.c -o ssize_t
> ssize_t.c: In function ‘main’:
> ssize_t.c:115:22: error: expected expression before ‘)’ token
> if (sizeof ((ssize_t)))
> any clue what to look for ?
That's probably SUPPOSED to happen.
Autoconf tests for type names by comparing:
sizeof(TYPE) /* should compile */
sizeof((TYPE)) /* should not compile */
If 'TYPE' is instead a constant, then both forms will compile. So it
allows you to probe whether an unknown string (in this case 'ssize_t')
is a type name or some other macro that expands into a constant.
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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