Re: GSOC second part

[John W. Eaton]

On 07/06/2015 06:22 PM, Carnë Draug wrote:
> On 6 July 2015 at 22:13, Piotr Held <address@hidden> wrote:
> > [...]
> > I have published on the repo version 0.2.0. Should I try to get it to Octave
> > Forge? I am not sure if it's ready.
> >
> > First of all, I use lambdas for one function, so I needed to add -std=c++11
> > to my CFLAGS (which I probably could rename CXXFLAGS). I don't have any
> > autoconf scripts to check if the compiler someone uses actually can compile
> > code using that flag. Do you have any ideas on this?
> > [...]
>
> The image package also makes use of lambdas and requires that flag.  Take
> a look at how it does it.
>
> http://hg.code.sf.net/p/octave/image/file/e977104b2492/src/configure.ac
>
> http://hg.code.sf.net/p/octave/image/file/e977104b2492/src/m4/ax_cxx_compile_stdcxx_11.m4
>
> http://hg.code.sf.net/p/octave/image/file/e977104b2492/src/Makefile.in
>
> Carnë

Modifying user variables like CPPFLAGS, CFLAGS, or CXXFLAGS in configure 
scripts is generally discouraged:


https://www.gnu.org/software/automake/manual/html_node/Flag-Variables-Ordering.html

Also, what will happen if -std=c++11 is not supported?  Does building 
the entire package fail, or is a feature disabled?  If possible, please 
make the lack of specific compiler features as harmless as possible.

Thanks,

jwe