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Building a project with Boost Histogram on Mac OS 15 with:

Apple clang version 16.0.0 (clang-1600.0.26.6) Target: arm64-apple-darwin24.3.0 Thread model: posix InstalledDir: /Library/Developer/CommandLineTools/usr/bin

Using the following command line:

g++ -std=c++14 -DHAVE_CONFIG_H -I. -I../../include -DBOOST_ALL_DYN_LINK -I/opt/local/include -I/usr/local/include -I/opt/local/include -I/usr/local/include -I/opt/local/include -I/usr/local/include -I/usr/local/include -g -O2 -MT test.lo -MD -MP -MF .deps/test.Tpo -c test.cpp -fno-common -DPIC -o .libs/Image

Creates the following error: In file included from test.cpp:4: In file included from /usr/local/include/boost/histogram.hpp:27: In file included from /usr/local/include/boost/histogram/algorithm.hpp:15: In file included from /usr/local/include/boost/histogram/algorithm/empty.hpp:11: In file included from /usr/local/include/boost/histogram/indexed.hpp:16: /usr/local/include/boost/histogram/detail/operators.hpp:48:14: error: use of overloaded operator '>' is ambiguous (with operand types 'const boost::histogram::indexed_range<boost::histogram::histogram<std::tuple<boost::histogram::axis::integer<>, boost::histogram::axis::integer<>>>>::accessor' and 'const boost::histogram::unlimited_storage<>::reference') 48 | return b > a; | ~ ^ ~ /usr/local/include/boost/histogram/indexed.hpp:191:20: note: in instantiation of function template specialization 'boost::histogram::detail::operator<<boost::histogram::unlimited_storage<>::reference>' requested here 191 | return get() < o; | ^ /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/v1/__algorithm/comp.h:41:18: note: in instantiation of function template specialization 'boost::histogram::indexed_range<boost::histogram::histogram<std::tuple<boost::histogram::axis::integer<>, boost::histogram::axis::integer<>>>>::accessor::operator<<boost::histogram::indexed_range<boost::histogram::histogram<std::tuple<boost::histogram::axis::integer<>, boost::histogram::axis::integer<>>>>::accessor>' requested here 41 | return __lhs < __rhs; | ^ /usr/local/include/boost/histogram/detail/operators.hpp:51:28: note: candidate function [with U = boost::histogram::indexed_range<boost::histogram::histogram<std::tuple<boost::histogram::axis::integer<>, boost::histogram::axis::integer<>>>>::accessor] 51 | friend if_not_same<T, U> operator>(const U& a, const T& b) noexcept { | ^ /usr/local/include/boost/histogram/indexed.hpp:195:10: note: candidate function [with U = boost::histogram::unlimited_storage<>::reference] 195 | bool operator>(const U& o) const noexcept { | ^ 1 error generated.

g++ aliases to clang - exact same result occurs with clang as the command.