On 30/07/2019 16:51, Jan Beulich wrote:
> On 25.07.2019 02:53, christopher.w.cl...@gmail.com wrote:
>> From: Christopher Clark <christopher.w.cl...@gmail.com>
>>
>> gcc 9.1.0 reports:
>>
>> | test-cpu-policy.c:64:18: error: '%.12s' directive argument is not a
>> nul-terminated string [-Werror=format-overflow=]
>> | 64 | fail(" Test '%.12s', expected vendor %u, got %u\n",
>> | | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> | test-cpu-policy.c:20:12: note: in definition of macro 'fail'
>> | 20 | printf(fmt, ##__VA_ARGS__); \
>> | | ^~~
>> | test-cpu-policy.c:64:27: note: format string is defined here
>> | 64 | fail(" Test '%.12s', expected vendor %u, got %u\n",
>> | | ^~~~~
>> | test-cpu-policy.c:44:7: note: referenced argument declared here
>> | 44 | } tests[] = {
>> | | ^~~~~
> In order to possibly create a bug report against gcc I've tried this:
>
> #include <stdio.h>
>
> struct s {
> char ac[12];
> int i;
> };
>
> void test(const struct s*ps) {
> printf("'%.12s'\n", ps->ac);
> }
>
> There's no warning here. Could you check whether the compiler warns on
> that simple test for you? If it does - are we talking about plain
> upstream 9.1.0 (in which case I'd be really puzzled by the difference
> in behavior)?
CC Dario who also reported this build failure.
~Andrew
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