I think you need gcc 4.8.1 at least.  It is possible to build gcc from
source.  https://gcc.gnu.org/wiki/InstallingGCC
 I've built 4.9 on SL6 boxes.  It takes long time, though.

Jeff


On Thu, Jun 26, 2014 at 12:14 AM, ToddAndMargo <toddandma...@zoho.com>
wrote:

> On 06/25/2014 10:17 PM, Peter Elmer wrote:
>
>>    Hi,
>>
>> On Wed, Jun 25, 2014 at 10:03:54PM -0700, ToddAndMargo wrote:
>>
>>> rpmbuild --rebuild librecad-2.0.4-1.fc20.src.rpm
>>> ...
>>> cc1plus: error: unrecognized command line option
>>> "-std=c++11"cc1plus: error: unrecognized command line option
>>> "-std=c++11"
>>>
>>
>>    It means that you are rebuilding a package with a compiler version
>> which is too old to support the -std=c++11 flag. (IIRC, it was -std=c++0x
>> for a long time in gcc. I don't recall which gcc version added the new
>> flag, but almost certainly it was later than gcc4.4, for example.) I guess
>> you are backporting this package?
>>
>>                                     Pete
>>
>
> Hi Pete,
>
>   Ye old out-of-date strikes again.  Probably will have
> to wait for SL7.  Rats!
>
>   Thank you for helping me with this,
>
> -T
>



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Jeffrey Anderson                        | jdander...@lbl.gov
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