Compiler errors with gcc8 centos7, macos 11 clang 12

[andresailer]

With clang12 on macos11 are these errors
http://cdash.cern.ch/upload/28e9243e849245051b65c6f78ea1329073ed941f/DD4hep-master-build.log

In file included from /Users/sftnight/build/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDDigi/src/DigiAction.cpp:15:
In file included from /Users/sftnight/build/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDCore/include/DD4hep/Printout.h:21:
In file included from /Users/sftnight/build/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDCore/include/Parsers/Printout.h:23:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/map:481:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/__tree:14:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/iterator:419:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/__functional_base:14:
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/type_traits:3060:14: error: base class has incomplete type
    : public is_constructible<_Tp,
      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/any:206:9: note: in instantiation of template class 'std::__1::is_copy_constructible<dd4hep::digi::Particle>' requested here
        is_copy_constructible<_Tp>::value>
        ^
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/any:515:6: note: in instantiation of default argument for 'any<const dd4hep::digi::Particle &, dd4hep::digi::Particle>' required here
any::any(_ValueType && __v) : __h(nullptr)
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/type_traits:3005:62: note: while substituting deduced template arguments into function template 'any' [with _ValueType = const dd4hep::digi::Particle &, _Tp = (no value), $2 = (no value)]
    : public integral_constant<bool, __is_constructible(_Tp, _Args...)>
                                                             ^
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/utility:353:18: note: in instantiation of template class 'std::__1::is_constructible<dd4hep::digi::Particle, const dd4hep::digi::Particle &>' requested here
              && is_constructible<second_type, _U2>::value
                 ^
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/utility:450:34: note: in instantiation of function template specialization 'std::__1::pair<const dd4hep::digi::Key, dd4hep::digi::Particle>::_CheckArgs::__enable_explicit<const dd4hep::digi::Key &, const dd4hep::digi::Particle &>' requested here
            _CheckArgs::template __enable_explicit<_U1 const&, _U2 const&>()
                                 ^
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/utility:453:14: note: (skipping 2 contexts in backtrace; use -ftemplate-backtrace-limit=0 to see all)
    explicit pair(pair<_U1, _U2> const& __p)
             ^
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/__tree:757:23: note: in instantiation of template class 'std::__1::__value_type<dd4hep::digi::Key, dd4hep::digi::Particle>' requested here
    __node_value_type __value_;
                      ^
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/__tree:1833:49: note: in instantiation of template class 'std::__1::__tree_node<std::__1::__value_type<dd4hep::digi::Key, dd4hep::digi::Particle>, void *>' requested here
        destroy(static_cast<__node_pointer>(__nd->__left_));
                                                ^
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/__tree:1824:3: note: in instantiation of member function 'std::__1::__tree<std::__1::__value_type<dd4hep::digi::Key, dd4hep::digi::Particle>, std::__1::__map_value_compare<dd4hep::digi::Key, std::__1::__value_type<dd4hep::digi::Key, dd4hep::digi::Particle>, std::__1::less<dd4hep::digi::Key>, true>, std::__1::allocator<std::__1::__value_type<dd4hep::digi::Key, dd4hep::digi::Particle>>>::destroy' requested here
  destroy(__root());
  ^
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/map:962:5: note: in instantiation of member function 'std::__1::__tree<std::__1::__value_type<dd4hep::digi::Key, dd4hep::digi::Particle>, std::__1::__map_value_compare<dd4hep::digi::Key, std::__1::__value_type<dd4hep::digi::Key, dd4hep::digi::Particle>, std::__1::less<dd4hep::digi::Key>, true>, std::__1::allocator<std::__1::__value_type<dd4hep::digi::Key, dd4hep::digi::Particle>>>::~__tree' requested here
    map()
    ^
/Users/sftnight/build/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDDigi/include/DDDigi/DigiData.h:333:29: note: in instantiation of member function 'std::__1::map<dd4hep::digi::Key, dd4hep::digi::Particle, std::__1::less<dd4hep::digi::Key>, std::__1::allocator<std::__1::pair<const dd4hep::digi::Key, dd4hep::digi::Particle>>>::map' requested here
    inline ParticleMapping::ParticleMapping(const std::string& nam, Key::mask_type msk)
                            ^
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/include/c++/v1/type_traits:3004:29: note: definition of 'std::__1::is_constructible<dd4hep::digi::Particle, const dd4hep::digi::Particle &>' is not complete until the closing '}'
struct _LIBCPP_TEMPLATE_VIS is_constructible
                            ^
[ 40%] Building CXX object DDCAD/CMakeFiles/DDCAD.dir/src/CADImport.cpp.o
[ 40%] Building CXX object DDCAD/CMakeFiles/DDCAD.dir/src/InputReader.cpp.o
1 error generated.
make[5]: *** [DDDigi/CMakeFiles/DDDigi.dir/src/DigiAction.cpp.o] Error 1

(less important because we maybe disable this build...)
With gcc8 there is this error
http://cdash.cern.ch/upload/0902a905b9dc871349020202e3bf93821162448b/DD4hep-master-build.log

[ 77%] Building CXX object DDDetectors/CMakeFiles/DDDetectors.dir/src/DiskTracker_geo.cpp.o
[ 77%] Building CXX object DDDigi/CMakeFiles/DDDigiPlugins.dir/plugins/Components.cpp.o
[ 77%] Building CXX object DDG4/CMakeFiles/DDG4.dir/src/Geant4PrimaryHandler.cpp.o
[ 77%] Building CXX object DDCond/CMakeFiles/DDCondPlugins.dir/src/plugins/ConditionsSnapshotRootLoader.cpp.o
In file included from /cvmfs/sft.cern.ch/lcg/releases/gcc/8.3.0-cebb0/x86_64-centos7/include/c++/8.3.0/bits/locale_conv.h:41,
                 from /cvmfs/sft.cern.ch/lcg/releases/gcc/8.3.0-cebb0/x86_64-centos7/include/c++/8.3.0/locale:43,
                 from /cvmfs/sft.cern.ch/lcg/releases/gcc/8.3.0-cebb0/x86_64-centos7/include/c++/8.3.0/iomanip:43,
                 from /build/jenkins/workspace/lcg_nightly_pipeline/install/dev3/ROOT/HEAD/x86_64-centos7-gcc8-opt/include/Math/GenVector/BitReproducible.h:24,
                 from /build/jenkins/workspace/lcg_nightly_pipeline/install/dev3/ROOT/HEAD/x86_64-centos7-gcc8-opt/include/Math/GenVector/DisplacementVector3D.h:29,
                 from /build/jenkins/workspace/lcg_nightly_pipeline/install/dev3/ROOT/HEAD/x86_64-centos7-gcc8-opt/include/Math/Vector3D.h:17,
                 from /build/jenkins/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDCore/include/DD4hep/Objects.h:36,
                 from /build/jenkins/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDCore/include/DD4hep/DetElement.h:19,
                 from /build/jenkins/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDCore/include/DD4hep/Factories.h:18,
                 from /build/jenkins/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDDigi/plugins/Components.cpp:16:
/cvmfs/sft.cern.ch/lcg/releases/gcc/8.3.0-cebb0/x86_64-centos7/include/c++/8.3.0/bits/unique_ptr.h: In instantiation of ‘void std::default_delete<_Tp>::operator()(_Tp*) const [with _Tp = dd4hep::digi::DigiROOTInput::internals_t]’:
/cvmfs/sft.cern.ch/lcg/releases/gcc/8.3.0-cebb0/x86_64-centos7/include/c++/8.3.0/bits/unique_ptr.h:274:17:   required from ‘std::unique_ptr<_Tp, _Dp>::~unique_ptr() [with _Tp = dd4hep::digi::DigiROOTInput::internals_t; _Dp = std::default_delete<dd4hep::digi::DigiROOTInput::internals_t>]’
/build/jenkins/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDDigi/include/DDDigi/DigiROOTInput.h:53:54:   required from here
/cvmfs/sft.cern.ch/lcg/releases/gcc/8.3.0-cebb0/x86_64-centos7/include/c++/8.3.0/bits/unique_ptr.h:79:16: error: invalid application of ‘sizeof’ to incomplete type ‘dd4hep::digi::DigiROOTInput::internals_t’
  static_assert(sizeof(_Tp)>0,
                ^~~~~~~~~~~
/cvmfs/sft.cern.ch/lcg/releases/gcc/8.3.0-cebb0/x86_64-centos7/include/c++/8.3.0/bits/unique_ptr.h: In instantiation of ‘void std::default_delete<_Tp>::operator()(_Tp*) const [with _Tp = dd4hep::digi::DigiROOTOutput::internals_t]’:
/cvmfs/sft.cern.ch/lcg/releases/gcc/8.3.0-cebb0/x86_64-centos7/include/c++/8.3.0/bits/unique_ptr.h:274:17:   required from ‘std::unique_ptr<_Tp, _Dp>::~unique_ptr() [with _Tp = dd4hep::digi::DigiROOTOutput::internals_t; _Dp = std::default_delete<dd4hep::digi::DigiROOTOutput::internals_t>]’
/build/jenkins/workspace/lcg_nightly_pipeline/build/frameworks/DD4hep-master/src/DD4hep/master/DDDigi/include/DDDigi/DigiROOTOutput.h:63:46:   required from here
/cvmfs/sft.cern.ch/lcg/releases/gcc/8.3.0-cebb0/x86_64-centos7/include/c++/8.3.0/bits/unique_ptr.h:79:16: error: invalid application of ‘sizeof’ to incomplete type ‘dd4hep::digi::DigiROOTOutput::internals_t’
[ 77%] Building CXX object DDDetectors/CMakeFiles/DDDetectors.dir/src/EcalBarrel_geo.cpp.o
make[5]: *** [DDDigi/CMakeFiles/DDDigiPlugins.dir/plugins/Components.cpp.o] Error 1