https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82287
Bug ID: 82287 Summary: When compiling with O2 or O3, memory model rejected Product: gcc Version: 4.9.4 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: geof.sawaya at oculus dot com Target Milestone: --- g++ testThreadSpawnTime.cpp -o testThreadSpawnTime -std=c++11 -O3 In file included from /usr/local/include/c++/4.9.4/atomic:41:0, from testThreadSpawnTime.cpp:5: /usr/local/include/c++/4.9.4/bits/atomic_base.h: In function ‘int main()’: /usr/local/include/c++/4.9.4/bits/atomic_base.h:478:2: error: invalid memory model for ‘__atomic_store’ __atomic_store_n(&_M_i, __i, __m); ^ /usr/local/include/c++/4.9.4/bits/atomic_base.h:478:2: error: invalid memory model for ‘__atomic_store’ __atomic_store_n(&_M_i, __i, __m); ^ /usr/local/include/c++/4.9.4/bits/atomic_base.h:478:2: error: invalid memory model for ‘__atomic_store’ __atomic_store_n(&_M_i, __i, __m); ^ The memory model is std::memory_order_acquire (used in atomic::store).