GCC11Compatibility.h

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#ifndef FWCORE_GCC11COMPATIBILITY_H
#define FWCORE_GCC11COMPATIBILITY_H
/*
 * set of macro to control the level of comaptibility with c++11 standard
 * includes also other macro more specific to gcc

 */

#include "FWCore/Utilities/interface/Visibility.h"
#include "FWCore/Utilities/interface/Likely.h"

#if defined(__GCCXML__) || defined(__CINT__)
#define CMS_NOCXX11
#endif
#if !GCC_PREREQUISITE(4, 6, 0) && !defined(__clang__)
#define CMS_NOCXX11
#endif

#ifndef CMS_NOCXX11
#if GCC_PREREQUISITE(4, 7, 0)
#define GCC11_FINAL final
#define GCC11_OVERRIDE override
#elif __clang__
// FIXME: do not know how to query for final support. It's there in any
//        clang version we will ever use, so it's fine.
#define GCC11_FINAL final
#if __has_feature(cxx_override_control)
#define GCC11_OVERRIDE override
#endif
#else
#define GCC11_FINAL
#define GCC11_OVERRIDE
#endif  // gcc 4.7
#else
#define constexpr
#define noexcept
#define nullptr 0
#define GCC11_FINAL
#define GCC11_OVERRIDE
#endif  // NOCXX11

#endif  // FWCORE_GCC11COMPATIBILITY_H