Re: compile with gcc option -O0 or -O

[zou wonder <wonder.zou@gmail.com>]

Hi David:

  Thanks for your reply, and I will try your suggestion.

Thanks all the guys again.


On Mon, Sep 19, 2011 at 5:56 PM, zou wonder <wonder.zou@gmail.com> wrote:
> Hi All:
>  i have just enable -Wall -Wextra. but seem there is no any useful
> infomation. just some things like:
>
> /work/smsc/include/xscmsgqueuemx.h:62: warning: unused parameter ‘seconds’
> /work/smsc/include/xscmsgqueuemx.h:247: warning: unused parameter ‘pri’
> xmmgiwparam.cc: In function ‘uint8 findSCerrInd(TASK_TYPE*,
> GIW_VAR_STR*, uint8*, uint8*, uint8*, uint8*)’:
> xmmgiwparam.cc:555: warning: suggest parentheses around ‘&&’ within ‘||’
> xmmgiwparam.cc: At global scope:
> xmmgiwparam.cc:212: warning: unused parameter ‘type’
> xmmgiwparam.cc:1391: warning: unused parameter ‘task’
> xmmgiwparam.cc:1462: warning: unused parameter ‘task’
> xmmgiwparam.cc:1574: warning: unused parameter ‘msg’
> xmmgiwparam.cc: In function ‘void put_giwu_MOdataInd(GIW_VAR_STR*, giw_asn*)’:
> xmmgiwparam.cc:1946: warning: unused variable ‘address’
> xmmgiwparam.cc: In function ‘void put_giw_up_params(MESSAGE*,
> PRIMITIVE, GIW_VAR_STR*)’:
> xmmgiwparam.cc:2055: warning: unused variable ‘alertingMSaddr’
> xmmgiwparam.cc:2060: warning: unused variable ‘addr_str’
> xmmgiwparam.cc: In function ‘void put_giwd_openReq(GIW_VAR_STR*,
> giw_asn*, ISDNAddress*)’:
> xmmgiwparam.cc:2915: warning: suggest parentheses around ‘&&’ within ‘||’
> xmmgiwparam.cc:2933: warning: suggest parentheses around ‘&&’ within ‘||’
> xmmgiwparam.cc: In function ‘void put_giwd_forwardSMReq(MESSAGE*,
> GIW_VAR_STR*, giw_asn*)’:
> xmmgiwparam.cc:3163: warning: suggest parentheses around ‘&&’ within ‘||’
> xmmgiwparam.cc: At global scope:
> xmmgiwparam.cc:3143: warning: unused parameter ‘msg’
> xmmgiwparam.cc: In function ‘void put_giw_down_params(MESSAGE*,
> PRIMITIVE, GIW_VAR_STR*)’:
> xmmgiwparam.cc:3347: warning: unused variable ‘smRPsmea’
> xmmgiwparam.cc:3348: warning: unused variable ‘scAddrForHLR’
> ,
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> I am wondering now,  Could i add the optimization options which is
> enable by -O one by one?
>
> by then, hope i could find which optimization option affect my code?
>
> but I do not know what is the difference options which is owned just by -O?
>
>
> thanks again.
>
> On Fri, Sep 16, 2011 at 5:47 PM, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:
>> On 16 September 2011 10:12, zou wonder wrote:
>>> hi david:
>>> i have tried to enable all the warning option you provided :
>>> and here are some warnings:
>>
>> As Miles said, many of the warning options David suggested are not
>> suitable for all code, you will get most of the benefit just using
>> -Wall -Wextra
>>
>