https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65147
--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> --- On Fri, 20 Feb 2015, alexey.lapshin at oracle dot com wrote: > According to the documentation - > https://gcc.gnu.org/wiki/Atomic/GCCMM/UnalignedPolicy alignment of atomic > object should match it`s size. > Alignment in the test case below does not match with documentation. Not in itself a bug to fail to follow preliminary plans. *But*: > This behavior also differs from gcc. Gcc aligns 8-bytes objects to 8-bytes. Differences between C and C++ atomics might be a bug - there may be intent for them to be ABI-compatible (although that didn't get implemented), unlike other aspects of the early plans you point to where intent changed over the course of implementation.
