On Mon, Jun 23, 2008 at 11:34 AM, Michael Kerrisk
<[EMAIL PROTECTED]> wrote:
> On Mon, Jun 23, 2008 at 11:33 AM, Stephane Chazelas
> <[EMAIL PROTECTED]> wrote:
>> On Mon, Jun 23, 2008 at 11:27:39AM +0200, Michael Kerrisk wrote:
>> [...]
>>> > Also, the %as GNU extension seems not to be documented
>>> > (it may return ENOMEM) in the man page. It is in the glibc
>>> > documentation.
>>>
>>> Have you tried using this? I'm trying to test now, but gcc complains
>>> that '%a' expects type 'float *'.
>> [...]
>>
>> ~$ cat a.c
>> #include <stdio.h>
>>
>> int main(int argc, char **argv)
>> {
>> char *a;
>> sscanf(argv[1], "%as", &a);
>> puts(a);
>> return 0;
>> }
>> ~$ cc -Wall -c a.c
>> ~$ ./a "xx yy"
>> xx
>> ~$ gcc-2.95 -Wall -c a.c
>> ~$ gcc-3.3 -Wall -c a.c
>> ~$ gcc-3.4 -Wall -c a.c
>> ~$ gcc-4.1 -Wall -c a.c
>> ~$ gcc-4.2 -Wall -c a.c
>> ~$ gcc-4.3 -Wall -c a.c
>> ~$
>>
>> Seems OK.
>>
>> Maybe you had "%a" instead of "%as"?
>
> No, my problem was that my cc alias includes ansi c 99, which disables
> this scanf() feature...
Okay -- so %as is available by default, but disabled by -std=c99,
unless _GNU_SOURCE is also specified :-}
--
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
man-pages online: http://www.kernel.org/doc/man-pages/online_pages.html
Found a bug? http://www.kernel.org/doc/man-pages/reporting_bugs.html
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