17 Sep
2008
17 Sep
'08
8:56 p.m.
Vladimir Prus:
Richard Ketcham wrote:
...
../../../bin.v2/libs/thread/build/gcc-arm/debug/threading-multi/libboost_thread-gcc-mt-d-1_36.so.1.36.0: undefined reference to `__sync_add_and_fetch_4' collect2: ld returned 1 exit status
The linking continues to fail with the same two errors.
The second error is caused by shared_ptr using gcc atomic intrinsics that are not actually supported on ARM.
I think that in 1.36, __sync_add_and_fetch is only used by detail::atomic_count, not shared_ptr. The fix in this case would be to add && !defined(__arm__) to the line #elif defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) in boost/detail/atomic_count.hpp.