Am Mon, 26 Oct 2020 09:32:33 +0200
schrieb Yuriy Skalko <yuriy.ska...@gmail.com>:

> > I have the following:
> > 
> > #define HAVE_DEF_MAKE_UNIQUE 1
> > 
> > Here is the diff I am using to force C++11:
> > 
> > diff --git a/development/cmake/modules/FindCXX11Compiler.cmake 
> > b/development/cmake/modules/FindCXX11Compiler.cmake
> > index f9a1aaf045..b990191424 100644
> > --- a/development/cmake/modules/FindCXX11Compiler.cmake
> > +++ b/development/cmake/modules/FindCXX11Compiler.cmake
> > @@ -57,8 +57,6 @@ else()
> >  # Detection of c++20 works well, but our code is not ready for it yet.
> >  # We currently get errors with internal boost and also from our code.
> >  #        "--std=c++20"
> > -        "--std=c++17"
> > -        "--std=c++14"
> >          "--std=c++11"
> >          "--std=gnu++11"
> >          "--std=gnu++0x"
> > 
> > Scott  
> 
> So that's why it gives compilation error. As I said before 
> HAVE_DEF_MAKE_UNIQUE should be inactive in C++11 mode. Have you tried to 
> remove CMake cache as Kornel suggested?
> 
> 
> Yuriy

Are you checking with the old gnu compiler? (E.g. without the feature about 
'cxx_std_'?)
Is the CMAKE_CXX_STANDARD correctly set?

        Kornel

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