> You should declare your delegate static...
Aha - I see. I've now declared a static delegate, and Vala now
generates the following C code:
typedef gint (*CompareFunc) (void* a, void* b);
static void qsort (void* base, gsize count, gsize size, CompareFunc f);
Unfortunately I still receive the same error message:
top.c:41: error: conflicting types for ‘qsort’
/usr/include/stdlib.h:689: error: previous declaration of ‘qsort’ was here
The problem seems to be that the library qsort expects a comparison
function that takes const pointers:
// in stdlib.h
typedef int (*__compar_fn_t) (__const void *, __const void *);
So, then: is there an attribute I can apply so that Vala will generate a
function prototype with const? Or must I fall back on wrapping qsort()
in a C function that's easier to call from Vala?
thanks!
adam
Thomas Chust wrote:
Adam Dingle schrieb:
[...]
So: is there some attribute I can apply to the extern declaration that
will cause Vala to generate a compatible function prototype? Or should I
instead write some C code to wrap qsort() into a C function which Vala
can call more easily? Thanks for any advice -
[...]
You should declare your delegate static, since qsort doesn't allow you
to pass a closure pointer through to the compare function. The signature
of the delegate function type and the qsort function declaration
generated by Vala should then be compatible with the C library.
cu,
Thomas
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