"clang++-18"   -fvisibility-inlines-hidden -Wno-c99-extensions -std=c++2b -fPIC -pthread -O0 -fno-inline -Wall -fvisibility=hidden -m64 --target=x86_64-pc-linux -ftemplate-depth-255 -DBOOST_ALL_NO_LIB=1 -DBOOST_ARCHIVE_TEST=xml_warchive.hpp -DBOOST_COBALT_USE_STD_PMR=1 -DBOOST_LIB_DIAGNOSTIC=1 -DBOOST_SERIALIZATION_DYN_LINK=1 -DBOOST_WSERIALIZATION_DYN_LINK=1   -I".."  -c -o "/var/boost/run/results/boost/bin.v2/libs/serialization/test/test_derived_class_xml_warchive.test/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/test_derived_class.o" "../libs/serialization/test/test_derived_class.cpp"

In file included from ../libs/serialization/test/test_derived_class.cpp:23:
../libs/serialization/test/B.hpp:56:17: warning: private field 's' is not used [-Wunused-private-field]
   56 |     signed char s;
      |                 ^
../libs/serialization/test/B.hpp:57:19: warning: private field 't' is not used [-Wunused-private-field]
   57 |     unsigned char t;
      |                   ^
../libs/serialization/test/B.hpp:58:16: warning: private field 'u' is not used [-Wunused-private-field]
   58 |     signed int u;
      |                ^
../libs/serialization/test/B.hpp:59:18: warning: private field 'v' is not used [-Wunused-private-field]
   59 |     unsigned int v;
      |                  ^
../libs/serialization/test/B.hpp:60:11: warning: private field 'w' is not used [-Wunused-private-field]
   60 |     float w;
      |           ^
../libs/serialization/test/B.hpp:61:12: warning: private field 'x' is not used [-Wunused-private-field]
   61 |     double x;
      |            ^
6 warnings generated.
            

    "clang++-18"  -Wl,-rpath -Wl,"/var/boost/run/results/boost/bin.v2/libs/serialization/build/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden" -Wl,-rpath-link -Wl,"/var/boost/run/results/boost/bin.v2/libs/serialization/build/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden" -o "/var/boost/run/results/boost/bin.v2/libs/serialization/test/test_derived_class_xml_warchive.test/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/test_derived_class_xml_warchive" -Wl,--start-group "/var/boost/run/results/boost/bin.v2/libs/serialization/test/test_derived_class_xml_warchive.test/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/test_derived_class.o" "/var/boost/run/results/boost/bin.v2/libs/serialization/test/test_derived_class_xml_warchive.test/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/A.o" "/var/boost/run/results/boost/bin.v2/libs/serialization/build/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/libboost_wserialization.so.1.87.0" "/var/boost/run/results/boost/bin.v2/libs/serialization/build/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/libboost_serialization.so.1.87.0"  -Wl,-Bstatic  -Wl,-Bdynamic -lrt -Wl,--end-group -fPIC -pthread -fvisibility=hidden -fvisibility-inlines-hidden -m64 --target=x86_64-pc-linux 

/usr/bin/ld: /var/boost/run/results/boost/bin.v2/libs/serialization/test/test_derived_class_xml_warchive.test/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/test_derived_class.o: in function `boost::archive::tmpnam(char*)':
test_derived_class.cpp:(.text+0xf5): undefined reference to `boost::filesystem::detail::path_algorithms::append_v3(boost::filesystem::path&, char const*, char const*)'
/usr/bin/ld: /var/boost/run/results/boost/bin.v2/libs/serialization/test/test_derived_class_xml_warchive.test/clang-linux-18~c++2b/debug/x86_64/debug-symbols-off/threading-multi/visibility-hidden/test_derived_class.o: in function `boost::filesystem::unique_path(boost::filesystem::path const&)':
test_derived_class.cpp:(.text._ZN5boost10filesystem11unique_pathERKNS0_4pathE[_ZN5boost10filesystem11unique_pathERKNS0_4pathE]+0x20): undefined reference to `boost::filesystem::detail::unique_path(boost::filesystem::path const&, boost::system::error_code*)'
clang++-18: error: linker command failed with exit code 1 (use -v to see invocation)