"clang++-17"   -fvisibility-inlines-hidden -Wno-c99-extensions -std=c++11 -fPIC -pthread -O0 -fno-inline -Wall -fvisibility=hidden -m64 --target=x86_64-pc-linux  -DBOOST_ALL_NO_LIB=1 -DBOOST_COBALT_USE_STD_PMR=1 -DBOOST_CONTAINER_DYN_LINK=1 -DBOOST_CONTAINER_NO_LIB=1 -DBOOST_TEST_DYN_LINK=1 -DBOOST_TEST_NO_AUTO_LINK=1   -I".." -I"/var/boost/run/boost_root/libs/assert/include" -I"/var/boost/run/boost_root/libs/bind/include" -I"/var/boost/run/boost_root/libs/container/include" -I"/var/boost/run/boost_root/libs/container_hash/include" -I"/var/boost/run/boost_root/libs/core/include" -I"/var/boost/run/boost_root/libs/describe/include" -I"/var/boost/run/boost_root/libs/detail/include" -I"/var/boost/run/boost_root/libs/function/include" -I"/var/boost/run/boost_root/libs/function_types/include" -I"/var/boost/run/boost_root/libs/fusion/include" -I"/var/boost/run/boost_root/libs/heap/include" -I"/var/boost/run/boost_root/libs/intrusive/include" -I"/var/boost/run/boost_root/libs/iterator/include" -I"/var/boost/run/boost_root/libs/move/include" -I"/var/boost/run/boost_root/libs/mp11/include" -I"/var/boost/run/boost_root/libs/optional/include" -I"/var/boost/run/boost_root/libs/parameter/include" -I"/var/boost/run/boost_root/libs/smart_ptr/include" -I"/var/boost/run/boost_root/libs/throw_exception/include" -I"/var/boost/run/boost_root/libs/tuple/include" -I"/var/boost/run/boost_root/libs/type_traits/include"  -c -o "/var/boost/run/results/boost/bin.v2/libs/heap/test/d_ary_heap_test.test/clang-linux-17~c++11/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/d_ary_heap_test.o" "../libs/heap/test/d_ary_heap_test.cpp"

In file included from ../libs/heap/test/d_ary_heap_test.cpp:20:
../libs/heap/test/common_heap_tests.hpp:51:1: error: 'auto' return without trailing return type; deduced return types are a C++14 extension
auto& get_rng()
^
../libs/heap/test/common_heap_tests.hpp:54:12: error: no viable conversion from returned value of type 'std::mt19937_64' (aka 'mersenne_twister_engine<unsigned long, 64, 312, 156, 31, 13043109905998158313ULL, 29, 6148914691236517205ULL, 17, 8202884508482404352ULL, 37, 18444473444759240704ULL, 43, 6364136223846793005ULL>') to function return type 'int'
    return rng;
           ^~~
2 errors generated.