Am Donnerstag, 7. Juli 2016 um 15:45:52, schrieb Enrico Forestieri
<for...@lyx.org>
> On Thu, Jul 07, 2016 at 02:15:33PM +0200, Jean-Marc Lasgouttes wrote:
> > Le 06/07/2016 à 21:52, Enrico Forestieri a écrit :
> > >>Enrico, could you provide a short snippet of code that will not compile
> > >>under cygwin with -std=c++11 ? I understand that it will be about
> > >>functions
> > >>like popen and friends, but I'd rather let you propose something.
> > >
> > >Yes, it complains also about setenv, unsetenv, readlink, lockf, etc.
> > >However, adding -D_GNU_SOURCE to CPPFLAGS it compiles fine.
> > >BTW, it now uses -std=c++14.
> >
> > So, what should we do wrt cygwin in your opinion? My idea was to add some
> > test code that would make cygwin break with stdc++14, but not gnu++14, like
> >
> > #include <cstdio>
> > popen("aaa", "r");
>
> Note that the problem with popen and friends seems to be a visibility
> one only. Using -std=c++xx simply makes them not visible. However they
> are visible again using -D_GNU_SOURCE and I didn't see any ill effect
> after that. So, I suggest to simply apply the attached patch.
>
Are you sure, that if defined __CYGWIN__, we really use a gnu compiler?
Kornel
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