Hi,
The diagnostic for the attribute directive ignored was due to an old GCC
version. However, I'm still seeing diagnostics that I think don't make
sense, with GCC 14.
I think this is a compiler bug (or two), maybe?
This seems to relate to array parameters; CC += Martin.
Cheers,
Alex
alx@www:/tmp$ cat str.c
#include <errno.h>
#include <stddef.h>
#include <string.h>
#include <sys/types.h>
[[gnu::access(read_write, 1)]]
[[gnu::access(write_only, 4)]]
[[gnu::null_terminated_string_arg(1)]]
[[gnu::null_terminated_string_arg(2)]]
inline ssize_t strsep2arr(char *s, const char *restrict delim,
size_t n, char *a[restrict n]);
// strsep(3) a string into an array of strings.
// Return the number of fields in the string, or -1 on error.
inline ssize_t strsep2arr(char *s, const char *restrict delim,
size_t n, char *a[restrict n])
{
size_t i;
for (i = 0; i < n && s != NULL; i++)
a[i] = strsep(&s, delim);
if (s != NULL) {
errno = E2BIG;
return -1;
}
return i;
}
alx@www:/tmp$ gcc -Wall -Wextra -S str.c
str.c:10:16: warning: attribute ‘access (write_only, 4)’ positional argument 2 missing in previous designation [-Wattributes]
10 | inline ssize_t strsep2arr(char *s, const char *restrict delim,
| ^~~~~~~~~~
str.c:11:12: note: designating the bound of variable length array argument 4
11 | size_t n, char *a[restrict n]);
| ~~~~~~~^ ~~~~~~~~~~~~~~~~~~~
str.c:16:21: warning: argument 4 of type ‘char *[restrict n]’ declared as a variable length array [-Wvla-parameter]
16 | size_t n, char *a[restrict n])
| ~~~~~~^~~~~~~~~~~~~
str.c:11:21: note: previously declared as an ordinary array ‘char *[restrict]’
11 | size_t n, char *a[restrict n]);
| ~~~~~~^~~~~~~~~~~~~
str.c: In function ‘strsep2arr’:
str.c:15:16: warning: attribute ‘access (write_only, 4)’ positional argument 2 missing in previous designation [-Wattributes]
15 | inline ssize_t strsep2arr(char *s, const char *restrict delim,
| ^~~~~~~~~~
str.c:16:12: note: designating the bound of variable length array argument 4
11 | size_t n, char *a[restrict n]);
| ~~~~~~~~~~~~~~~~~~~
......
16 | size_t n, char *a[restrict n])
| ~~~~~~~^
alx@www:/tmp$ gcc --version
gcc (Debian 14.2.0-8) 14.2.0
Copyright (C) 2024 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
--
<https://www.alejandro-colomar.es/>
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