Re: [Gcl-devel] [Maxima-discuss] Maxima 5.34.1 with GCL 2.6.12 debian sid

[Camm Maguire]

Greetings, and thanks so much for trying out the (soon to be released)
2.6.12pre currently in Debian sid.

Debian policy specifies default gcc compiler flags to offer some degree
of security protection in shipped binaries.  These include the stack
protector flags, which are only supported in more recent versions of gcc
(e.g. the one in the Debian sid distribution), and which attempt to
detect and prevent certain stack overflow attacks.  (It was actually
tricky to get GCL, prelink, unexec, and these flags to play well
together :-)).

So in sum, I don't have much choice regarding the gcl shipped in Debian,
but of course users building from source can use whatever gcc and flags
they desire.  These extra protections do not noticeably impact
performance.  There should, BTW, be a slight performance gain in
2.6.12pre over 2.6.11  on the maxima testsuite.

Take care,

Volker van Nek <address@hidden> writes:

> Am 03.10.2014 um 05:08 schrieb Raymond Toy:
>>>>>>> "Volker" == Volker van Nek <address@hidden> writes:
>> 
>>     Volker> Hi Camm,
>>     Volker> this afternoon I installed Maxima 5.34.1 with GCL 2.6.12 
>> packaged from
>>     Volker> debian sid at work on a 32 bit machine and now at home I did the 
>> same on
>>     Volker> 64 bit. In both cases I observed a problem when compiling.
>> 
>>     Volker> Thanks for any hints.
>> 
>> Seems like whoever built gcl used a different version of the compiler
>> that what you have on your system.
>
> If I remember right I had the same problem when compiling Maxima with a
> packaged GCL 2.6.11 from debian sid. The same error.
> gcc: error: unrecognized command line option ‘-fstack-protector-strong’
>
> And then I also built GCL from sources.
>
> It seems that this compiler option - compiler version? - breaks the
> debian GCL builds (at least for some users).
>
> Volker
>
>> 
>> FWIW, I built gcl from sources on an Ubuntu system. Compiles and runs
>> maxima just fine.
>> 
>> Ray
>> 
>> 
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-- 
Camm Maguire                                        address@hidden
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