On Fri, 8 Nov 2013, Andreas Schwab wrote: > "Joseph S. Myers" <jos...@codesourcery.com> writes: > > > The test gcc.dg/atomic/c11-atomic-exec-5.c will indicate if this is > > working correctly for your architecture, as long as your system supports > > pthreads (required to run that test). If any of the other > > c11-atomic-exec-* tests are failing, you should fix that first as it > > indicates a more serious issue with atomic operations on your target. > > All of the tests require sync_long_long_runtime, so they are currently > useless.
The tests do not require sync_long_long_runtime. ISO C requires atomic operations to be available on types of all sizes, but they need not be lock-free and need not be inlined. It is the function of libatomic to provide whatever atomic operations are not inlined or in libgcc, using locking when necessary. If some required operation is not being provided by libatomic on some target, that's a pre-existing GCC bug on that target (the __atomic_* built-in functions are *also* meant to be available for types of all sizes on all targets, and I expect any such bug would have shown up with them as well). -- Joseph S. Myers jos...@codesourcery.com
