[LyX/master] Make it possible to select C++ standard with autoconf

[Jean-Marc Lasgouttes]

Le 03/11/2020 à 16:16, Pavel Sanda a écrit :
> On Tue, Nov 03, 2020 at 04:12:16PM +0100, Pavel Sanda wrote:
>> On Tue, Nov 03, 2020 at 02:44:43PM +0100, Jean-Marc Lasgouttes wrote:
>>> commit ce526607ff4ae33834dabe64e0072530eca16183
>>> Author: Jean-Marc Lasgouttes <lasgouttes at lyx.org>
>>> Date:   Mon Nov 2 17:40:29 2020 +0100
>>>
>>>      Make it possible to select C++ standard with autoconf
>>>      
>>>      Introduce new configure option --enable-cxx-mode=MODE, which allows to
>>>      force a C++ version. The default is {14,11}, which means that C++14 is
>>>      chosen if it is supported, and C++11 will be selected as a fallback.
>>>      
>>>      Using --enable-cxx-mode=11 ensures that LyX compiles correctly
>>>      with an older C++11 compiler.
>>
>> Is this supposed to work by default on old compilers or do I need to
>> pass cxx-mode now?
>>
>> checking for a good C++ mode... none
>> configure: error: Cannot find suitable mode for compiler g++
>> make: *** [Makefile:502: config.status] Error 1
> 
> looking at the log I see:
> g++: error: unrecognized command line option '-std=gnu++14,11'
> Seems like wrong argument?

Definitely. I'll look at it asap.

JMarc