Single Warning Analysis Request

Thu Sep 18 14:56:52 UTC 2014

Hi, I've been looking this, and I saw the following:
This warning arise because the %lc format option is for wint_t type,
and we are passing a wchar_t type.
At the architectures that doesn't give the warning, those two types
are the same (wint_t and wchar_t), and those who give the warning have
them of different types. At the end I'll show how I could see that.
According to the c standard there isn't an option to print one wchar_t
character, but you can print a string of wchar_t (passing the pointer,
and with WEOF as end of string) so, one solution could be print this
variable as follows:
wchar_t  wc[2]= {L'a'}; (or wchar_t  wc[2]= {L'a', WEOF};
printf("%ls",wc);

The other could be that gcc has wrongly defined the types for wchar_t
and wint_t for those architectures. This should be analysed

On Wed, Sep 17, 2014 at 4:55 PM, Marcos Díaz
<marcos.diaz at tallertechnologies.com> wrote:
> Thanks, I will look into it.
>
> On Wed, Sep 17, 2014 at 4:02 PM, Joel Sherrill
> <joel.sherrill at oarcorp.com> wrote:
>>
>> On 9/17/2014 1:38 PM, Marcos Díaz wrote:
>>> Where can we see in which BSP's and with which tools this warning was
>>> generated? Thanks
>> OK.  It is with the tools generated by the current RSB and
>> the RTEMS head.
>>
>> I have attached a cut down and script that I used to test it
>> on all RTEMS gcc's I have installed. It gives a summary and
>> is easy to hack on. Plus this doesn't need RTEMS at all to
>> investigate the warning. :)
>>
>> === arm-rtems4.11-gcc - no warning
>> === avr-rtems4.11 - warning
>> === bfin-rtems4.11-gcc - no warning
>> === h8300-rtems4.11 - warning
>> === i386-rtems4.11-gcc - no warning
>> === lm32-rtems4.11-gcc - no warning
>> === m68k-rtems4.11-gcc - warning
>> === m32c-rtems4.11-gcc - warning
>> === m32r-rtems4.11-gcc - no warning
>> === mips-rtems4.11-gcc - no warning
>> === moxie-rtems4.11-gcc - no warning
>> === nios2-rtems4.11-gcc - no warning
>> === or1k-rtems4.11-gcc - no warning
>> === powerpc-rtems4.11-gcc - warning
>> === sh-rtems4.11-gcc - warning
>> === sparc64-rtems4.11-gcc - no warning
>> === sparc-rtems4.11-gcc - warning
>> === v850-rtems4.11-gcc - warning
>>
>> This is the list of BSPs that have this warning. Interesting that at least
>> arm, mips, m32r, moxie, nios2, and sparc64 don't generate this.
>>
>> m32c-m32csim m68k-av5282 m68k-COBRA5475 m68k-csb360 m68k-gen68302
>> m68k-gen68340 m68k-gen68360_040 m68k-gen68360 m68k-idp
>> m68k-m5484FireEngine m68k-mcf52235 m68k-mcf5225x m68k-mcf5235
>> m68k-mcf5329 m68k-mrm332 m68k-mvme136 m68k-mvme147 m68k-mvme147s
>> m68k-mvme167 m68k-ods68302 m68k-pgh360 m68k-sim68000 m68k-simcpu32
>> m68k-uC5282 powerpc-ep1a powerpc-haleakala powerpc-mbx821_001
>> powerpc-mbx821_002b powerpc-mbx821_002 powerpc-mbx860_001b
>> powerpc-mbx860_002 powerpc-mbx860_005b powerpc-mbx860_1b
>> powerpc-mpc8260ads powerpc-pghplus powerpc-psim powerpc-qemuppc
>> powerpc-ss555 powerpc-tqm8xx_stk8xx powerpc-virtex4 powerpc-virtex5
>> powerpc-virtex sh-gensh1 sh-gensh2 sh-gensh4 sh-simsh1 sh-simsh2e
>> sh-simsh2 sh-simsh4 sparc-erc32 sparc-leon2 sparc-leon3 sparc-ngmp
>> sparc-sis v850-v850e1sim v850-v850e2sim v850-v850e2v3sim
>> v850-v850esim v850-v850essim v850-v850sim
>>
>>
>>> On Wed, Sep 17, 2014 at 12:40 PM, Joel Sherrill
>>> <joel.sherrill at oarcorp.com> wrote:
>>>> On 9/17/2014 10:23 AM, Daniel Gutson wrote:
>>>>> Marcos and I will take a look.
>>>> Thanks.
>>>>> On Wed, Sep 17, 2014 at 12:19 PM, Joel Sherrill
>>>>> <joel.sherrill at oarcorp.com> wrote:
>>>>>> Hi
>>>>>>
>>>>>> I would really appreciate it if someone could look into this
>>>>>> warning and see if we can get an explanation. It could be
>>>>>> a source code issue or something higher in the tools.
>>>>>> It is reported on 120 BSP build configurations:
>>>>>>
>>>>>> ../../../../../../rtems/c/src/../../cpukit/libmisc/shell/hexdump-conv.c:145:4:
>>>>>> warning: format '%lc' expects argument of type 'wint_t', but argument 4
>>>>>> has type 'wchar_t' [-Wformat=]
>>>>>> ../../../../../../rtems/c/src/../../cpukit/libmisc/shell/hexdump-conv.c:145:4:
>>>>>> warning: format '%lc' expects argument of type 'wint_t', but argument 4
>>>>>> has type 'wchar_t' [-Wformat=]
>>>>>>
>>>>>> Thanks.
>>>>>>
>>>>>> --
>>>>>> Joel Sherrill, Ph.D.             Director of Research & Development
>>>>>> joel.sherrill at OARcorp.com        On-Line Applications Research
>>>>>> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>>>>>> Support Available                (256) 722-9985
>>>>>>
>>>>>> _______________________________________________
>>>>>> devel mailing list
>>>>>> devel at rtems.org
>>>>>> http://lists.rtems.org/mailman/listinfo/devel
>>>>>
>>>> --
>>>> Joel Sherrill, Ph.D.             Director of Research & Development
>>>> joel.sherrill at OARcorp.com        On-Line Applications Research
>>>> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>>>> Support Available                (256) 722-9985
>>>>
>>>>
>>>
>>>
>>
>> --
>> Joel Sherrill, Ph.D.             Director of Research & Development
>> joel.sherrill at OARcorp.com        On-Line Applications Research
>> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>> Support Available                (256) 722-9985
>>
>
>
>
> --
> ______________________________
>
>
> Marcos Díaz
>
> Software Engineer
>
>
> San Lorenzo 47, 3rd Floor, Office 5
>
> Córdoba, Argentina
>
>
> Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452
>
> Skype: markdiaz22

-- 
______________________________

Marcos Díaz

Software Engineer

San Lorenzo 47, 3rd Floor, Office 5

Córdoba, Argentina

Phone: +54 351 4217888 / +54 351 4218211/ +54 351 7617452

Skype: markdiaz22