[FFmpeg-user] ffmpeg 1.0.5 and buffer underflow - Update

[Reindl Harald]

Am 04.05.2013 15:23, schrieb Carl Eugen Hoyos:
> Reindl Harald <h.reindl <at> thelounge.net> writes:
> 
>>>> --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 
>>>> -fexceptions -fstack-protector --param=ssp-buffer-size=4 
>>>> -m64 -mtune=generic'
> 
>> have you ever considered to google them?
>>
>> "-D_FORTIFY_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4" 
>> are default for ANY package of most linux-distributions 
>> since years for security reasons
> 
> Do you know of any problems these parameters fix?

they are intented to give a safety net for UNKNOWN problems

>> and for a hardening build you enable 
>> "-fPIC -fPIE -fstack-protector-all" too as also 
>> "-Wl,-z,now -Wl,-z,relro" as LDFLAGS
> 
> None of these are used above, so I wonder how this 
> is related?

they belong together in case of a hardened build

> And please note that of the options you did not comment on, 
> some are useless, some harmful, so the argument "people 
> know what they do" (in case this is your argument) 
> seems insupportable

maybe you should comment the one of one and not quote
the whole option line and say it is useless?

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 263 bytes
Desc: OpenPGP digital signature
URL: <http://ffmpeg.org/pipermail/ffmpeg-user/attachments/20130504/6218c67f/attachment.asc>