Hi,
At Sat, 18 Dec 2004 14:06:24 +0200,
Antti-Juhani Kaijanaho wrote:
> On 20041218T201450+0900, GOTO Masanori wrote:
> > Could you provide a sample test program for the latest sarge glibc/gcc?
>
> I'm running sid, so this is tested on sid:
>
> The following demonstrates that the bug is still valid:
>
> [EMAIL PROTECTED]:43:18]:~$ dpkg -l libc6 gcc
> Desired=Unknown/Install/Remove/Purge/Hold
> | Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
> |/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err:
> uppercase=bad)
> ||/ Name Version Description
> +++-======================-======================-============================================================
> ii libc6 2.3.2.ds1-19 GNU C Library: Shared
> libraries and Timezone data
> ii gcc 3.3.5-1 The GNU C compiler
> [EMAIL PROTECTED]:04:26]:~$ cat bug155835.c
> #include <stdio.h>
>
> int main(void)
> {
> char *s;
> scanf("%as", &s);
> // if this echoes what you wrote,
> // the bug is still valid (%as has GNU semantics)
> printf("Read: %s\n", s);
> return 0;
> }
> [EMAIL PROTECTED]:04:30]:~$ gcc --std=c99 -Wall bug155835.c
> bug155835.c: In function `main':
> bug155835.c:6: warning: float format, pointer arg (arg 2)
> [EMAIL PROTECTED]:04:39]:~$ ./a.out
> foo
> Read: foo
> [EMAIL PROTECTED]:04:43]:~$
This warning is come from gcc, not glibc. Gcc parses the first
argument of scanf. When gcc mets %as in C99 mode, GNU extension
should not be treated. This is gcc's expected behavior, so this is
not bug.
(If you don't have complain about it, I'll close it)
Regards,
-- gotom
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