Re: [Gimp-developer] GNU++11 not allowed with Objective-C code

[Partha Bagchi <partha1b gmail com>]

On Sat, Apr 7, 2018 at 3:43 PM, Partha Bagchi <partha1b gmail com> wrote:

> On Sat, Apr 7, 2018 at 1:24 PM, Ell via gimp-developer-list <
> gimp-developer-list gnome org> wrote:
>
> > On Sat, 7 Apr 2018 12:41:10 -0400
> > Partha Bagchi <partha1b gmail com> wrote:
> >
> > > Ell my friend, it's me again. :)
> > >
> > > We can't use gnu++11 with objective-c code.
> > >
> > >   CXX      gimp-parallel.o
> > >
> > > error: invalid argument '-std=gnu++11' not allowed with 'Objective-C'
> > >
> > > make[3]: *** [gimp-parallel.o] Error 1
> > >
> > > So, how do we fix this? Also, shouldn't we be using c++11 or c++14 to
> > > be generic?
> >
> > The specific compiler flag is chosen by some configure magic, so it
> > should generally be ok.  A little googling shows that people are
> > getting the same error with -std=c++11 too.
> >
> > I'm not sure why clang tries to compile this as objective-c, though.
> > Can you post the output of $ make V=1 ?
> >
> > --
> > Ell
> >
> > My apologies. I should have framed that as 2 different issues. One about
> the compilation and the other that we should probably be using C++14 (or
> 11) instead of gnu++11.
>
> In any case, the verbose mode may not be particularly helpful:
>
>  g++ -DHAVE_CONFIG_H -I. -I../..  -DGIMPDIR=\""GIMP"\"
> -DGIMP_APP_VERSION=\"2.10\" -DGIMP_USER_VERSION=\"2.10\"
> -DG_LOG_DOMAIN=\"Gimp-Core\" -I../.. -I../.. -I../../app -I../../app
> -I/Users/partha/local10.9/include/cairo -I/Users/partha/local10.9/include/pixman-1
> -I/Users/partha/local10.9/include -I/Users/partha/local10.9/include/freetype2
> -I/Users/partha/local10.9/include -I/Users/partha/local10.9/include/libpng16
> -I/Users/partha/local10.9/include/harfbuzz -I/Users/partha/local10.9/include/glib-2.0
> -I/Users/partha/local10.9/lib/glib-2.0/include -I/Users/partha/local10.9/include
> -I/Users/partha/local10.9/include/freetype2 -I/Users/partha/local10.9/include/harfbuzz
> -I/Users/partha/local10.9/include/glib-2.0 -I/Users/partha/local10.9/lib/glib-2.0/include
> -I/Users/partha/local10.9/include/libpng16 -I/Users/partha/local10.9/include
> -D_REENTRANT -I/Users/partha/local10.9/include/json-glib-1.0
> -I/Users/partha/local10.9/include/gio-unix-2.0/ -I/Users/partha/local10.9/include/glib-2.0
> -I/Users/partha/local10.9/lib/glib-2.0/include -I/Users/partha/local10.9/
> mcgimp-std/Contents/Resources/include/gegl-0.3 -I/Users/partha/local10.9/
> mcgimp-std/Contents/Resources/include/babl-0.1 -D_REENTRANT
> -I/Users/partha/local10.9/include/gdk-pixbuf-2.0
> -I/Users/partha/local10.9/include/libpng16 -I/Users/partha/local10.9/include
> -I/Users/partha/local10.9/include/glib-2.0 -I/Users/partha/local10.9/lib/glib-2.0/include
> -I/Users/partha/local10.9/include/libmypaint -I/Users/partha/local10.9/include/json-c
> -I/Users/partha/local10.9/include/glib-2.0 -I/Users/partha/local10.9/lib/glib-2.0/include
> -I/Users/partha/local10.9/include -I/Users/partha/local10.9/include/glib-2.0
> -I/Users/partha/local10.9/lib/glib-2.0/include -I/Users/partha/local10.9/
> mcgimp-std/Contents/Resources/include "-xobjective-c"
> -I/Users/partha/local10.9/include -DGIMP_DISABLE_DEPRECATED
> -DBABL_DISABLE_DEPRECATED -DGSEAL_ENABLE -DGDK_DISABLE_DEPRECATED
> -DGTK_DISABLE_DEPRECATED -DGDK_MULTIHEAD_SAFE -DGTK_MULTIHEAD_SAFE
> -std=c++14 -O3 -ffast-math -ftree-vectorize -mmacosx-version-min=10.9 -MT
> gimp-parallel.o -MD -MP -MF .deps/gimp-parallel.Tpo -c -o gimp-parallel.o
> gimp-parallel.cc
> error: invalid argument '-std=c++14' not allowed with 'Objective-C'
> make: *** [gimp-parallel.o] Error 1
>
> In there you can see "-xobjective-c" is being used to compile
> gimp-parallel.cc. Also, you're seeing -std=c++14 because I have CXXFLAGS
> defined that way.
>
> Thanks,
> Partha
>
> As a further test, I tried this:

 c++ -std=c++14 -O3 -ffast-math -ftree-vectorize -mmacosx-version-min=10.9
-c gimp-parallel.cc -I. -I../.. `pkg-config --cflags glib-2.0` `pkg-config
--cflags gegl-0.3` -I..

It compiles fine. Hope that's helpful.