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Forum: Installation and Configuration
Re: None Errors when compiling example (Francesco)
Date: 03 Aug, 2015
From: Ben Morgan <Ben Morgan>

On Mon, 03 Aug 2015 06:33:46 GMT, Francesco wrote:
> Dear All,
> 
> I write to report a problem I got when compiling the example
> Hadrontherapy. I installed GEANT4 on Mac OS 10.10.4, where I had ROOT
> already installed. Basic examples worked well, but now I get several
> errors when compiling. Here a couple of examples:
> 
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/atomic:539:2:
> error:  is not implemented #error  is not implemented
> 
> /Users/root/include/Rtypes.h:226:14: error: no type named 'atomic' in
> namespace 'std' typedef std::atomic atomic_TClass_ptr;

Which ROOT version and C++ standard are you using? It looks like this may be ROOT6 and certainly compiled with C++11 (hence the use of atomics). In either case, I think you'll need to recompile Geant4 itself in C++11 mode by reconfiguring with the GEANT4_BUILD_CXXSTD option set to "c++11" and then rebuilding/installing. The example should then automatically pick up the correct set of flags to use when building.

Cheers,

Ben.

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