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###
### Running command:
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###   /Library/Frameworks/R.framework/Resources/bin/R CMD INSTALL Cardinal
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* installing to library ‘/Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/library’
* installing *source* package ‘Cardinal’ ...
** using staged installation
** libs
clang++ -arch arm64 -std=gnu++14 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I/opt/R/arm64/include   -fPIC  -falign-functions=64 -Wall -g -O2  -c DIP.cpp -o DIP.o
In file included from DIP.cpp:2:
In file included from ./Cardinal.h:9:
In file included from /Library/Frameworks/R.framework/Resources/include/Rinternals.h:36:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:56:1: error: templates must have C++ linkage
template <class _Tp> struct __libcpp_is_integral                     { enum { value = 0 }; };
^~~~~~~~~~~~~~~~~~~~
./Cardinal.h:7:1: note: extern "C" language linkage specification begins here
extern "C"
^
In file included from DIP.cpp:2:
In file included from ./Cardinal.h:9:
In file included from /Library/Frameworks/R.framework/Resources/include/Rinternals.h:36:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:57:29: error: explicit specialization of undeclared template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<bool>               { enum { value = 1 }; };
                            ^                   ~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:58:29: error: explicit specialization of non-template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<char>               { enum { value = 1 }; };
                            ^                   ~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:58:29: error: redefinition of '__libcpp_is_integral'
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:57:29: note: previous definition is here
template <>          struct __libcpp_is_integral<bool>               { enum { value = 1 }; };
                            ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:59:29: error: explicit specialization of non-template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<signed char>        { enum { value = 1 }; };
                            ^                   ~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:59:29: error: redefinition of '__libcpp_is_integral'
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:57:29: note: previous definition is here
template <>          struct __libcpp_is_integral<bool>               { enum { value = 1 }; };
                            ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:60:29: error: explicit specialization of non-template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<unsigned char>      { enum { value = 1 }; };
                            ^                   ~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:60:29: error: redefinition of '__libcpp_is_integral'
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:57:29: note: previous definition is here
template <>          struct __libcpp_is_integral<bool>               { enum { value = 1 }; };
                            ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:62:29: error: explicit specialization of non-template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<wchar_t>            { enum { value = 1 }; };
                            ^                   ~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:62:29: error: redefinition of '__libcpp_is_integral'
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:57:29: note: previous definition is here
template <>          struct __libcpp_is_integral<bool>               { enum { value = 1 }; };
                            ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:68:29: error: explicit specialization of non-template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<char16_t>           { enum { value = 1 }; };
                            ^                   ~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:68:29: error: redefinition of '__libcpp_is_integral'
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:57:29: note: previous definition is here
template <>          struct __libcpp_is_integral<bool>               { enum { value = 1 }; };
                            ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:69:29: error: explicit specialization of non-template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<char32_t>           { enum { value = 1 }; };
                            ^                   ~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:69:29: error: redefinition of '__libcpp_is_integral'
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:57:29: note: previous definition is here
template <>          struct __libcpp_is_integral<bool>               { enum { value = 1 }; };
                            ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:71:29: error: explicit specialization of non-template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<short>              { enum { value = 1 }; };
                            ^                   ~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:71:29: error: redefinition of '__libcpp_is_integral'
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:57:29: note: previous definition is here
template <>          struct __libcpp_is_integral<bool>               { enum { value = 1 }; };
                            ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:72:29: error: explicit specialization of non-template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<unsigned short>     { enum { value = 1 }; };
                            ^                   ~~~~~~~~~~~~~~~~
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:72:29: error: redefinition of '__libcpp_is_integral'
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:57:29: note: previous definition is here
template <>          struct __libcpp_is_integral<bool>               { enum { value = 1 }; };
                            ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/cstddef:73:29: error: explicit specialization of non-template struct '__libcpp_is_integral'
template <>          struct __libcpp_is_integral<int>                { enum { value = 1 }; };
                            ^                   ~~~~~
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make: *** [DIP.o] Error 1
ERROR: compilation failed for package ‘Cardinal’
* removing ‘/Library/Frameworks/R.framework/Versions/4.2-arm64/Resources/library/Cardinal’