blob: fa65fc96f2e10420b513c45c51fef081f2c71981 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
?RCS:
?RCS: Copyright (c) 2012 Raphael Manfredi
?RCS:
?RCS: You may redistribute only under the terms of the Artistic License,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic License; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?MAKE:d_mempcpy: Trylink cat
?MAKE: -pick add $@ %<
?S:d_mempcpy:
?S: This variable conditionally defines the HAS_MEMPCPY symbol, which
?S: indicates to the C program that the mempcpy() routine is available
?S: to copy blocks of memory and returns a pointer past the last written
?S: byte.
?S:.
?C:HAS_MEMPCPY:
?C: This symbol, if defined, indicates that the mempcpy routine is available
?C: to copy blocks of memory, returning a pointer past the last written byte.
?C:.
?H:#$d_mempcpy HAS_MEMPCPY /**/
?H:.
?LINT:set d_mempcpy
: see if mempcpy exists
?X:
?X: Need some extra code convolutions to avoid gcc's optimizing the mempcpy()
?X: call with its built-in implementation.
?X:
$cat >try.c <<EOC
#include <string.h>
void *copy(void *d, const void *s, unsigned n)
{
char *q = d;
const char *r = s;
return mempcpy(q + 4, r + 2, n - 1);
}
int main(void)
{
static char src, dst;
void *p;
p = copy(&dst, &src, sizeof(dst));
return p ? 0 : 1;
}
EOC
cyn=mempcpy
set d_mempcpy
eval $trylink
|
