Hi all， I have gcc 4.9.0 installed in my system. When I tried to run an executable, I got the following error: libMyLib.so: undefined symbol: __atomic_store Then I tried to find this symbol in libstdc++.so with the following command: [workspace]$ nm -DC /usr/lib64/libstdc++.so | grep atomic 000000348e07bdb0 T __gnu_cxx::__atomic_add(int volatile*, int) 000000348e05c0c0 T std::__atomic0::atomic_flag::test_and_set(std::memory_order) 000000348e05c120 T std::__atomic0::atomic_flag::clear(std::memory_order) 000000348e05c0c0 T std::__atomic0::atomic_flag::test_and_set(std::memory_order) volatile 000000348e05c120 T std::__atomic0::atomic_flag::clear(std::memory_order) volatile 000000348e05c1b0 T __atomic_flag_for_address 000000348e05c180 T __atomic_flag_wait_explicit 000000348e05c170 T atomic_flag_clear_explicit 000000348e05c160 T atomic_flag_test_and_set_explicit There is no __atomic_store indeed. Did I miss some flags when installing gcc? Thanks, Ming
