On 12/30/18 1:27 PM, Remus Clearwater wrote:
> Suddenly appear to me that it would be much tricky if some C library choose
> to export an extern C function pointer variable. I didn't notice such
> situation a moment ago.
That's easier to understand if you actually try an example. Try this:
static int sum(int* a, int n) __attribute__((noinline));
static int sum(int* a, int n) {
return *a + n;
}
int sum_n(int* a, int n) {
return sum(a, n);
}
Compile it with
gcc -m32 -S -O3 z.c
Then add these lines to the file
typedef int sum_t(int *a, int n);
sum_t *sum_p(void) {
return sum;
}
--
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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