retitle 680329 Does not parse GCC mode attribute for integer sizes (used in
sys/types.h)
thanks
On Thu, Jul 05, 2012 at 01:03:33PM +1000, Erik de Castro Lopo wrote:
Josh Triplett wrote:
Package: c2hs
Version: 0.16.3-2
Severity: important
A library I'd like to write bindings to has a typedef of int64_t to a
library-specific type name. c2hs seems to interpret that type as CInt,
both in foreign import declarations and in {# type #} directives. It
should interpret that type as a 64-bit integer type instead.
I've seen this happen before and the cause was that the header file
defining the int64_t to something else did not include stdint.h.
I think the solution was to tell c2hs somehow that stdint.h should be
included before the project specific header.
The project does actually include stdint.h, but before it does so, it
(indirectly) includes sys/types.h, which defines int64_t in a
different way that c2hs can't cope with:
$ cpp /usr/include/stdint.h | grep -w int64_t
typedef long int int64_t;
$ cpp /usr/include/sys/types.h | grep -w int64_t
typedef int int64_t __attribute__ ((__mode__ (__DI__)));
I'd guess that c2hs ignores the GCC-specific __attribute__ that
overrides the size, and just sees int.
Including stdint.h at the top of my .chs file works around the
problem, and causes c2hs to define the type as CLong.
- Josh Triplett
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