> > This patch implements a check in the runtime library that determines > > whether > > the current target supports the atomic primitives up to 64 bits. > > If I understand the name of the flag, it looks like an "all or nothing" for > atomic primitives?
Right. > is that a consequence of the language definition, or simply that it isn't > worth spending a lot of effort on 32 bit machines? The latter for now. > > This should fix build failures on e.g. powerpc-darwin. > > almost :-) > > On a 64-bit processor, the [32 bit] powerpc-darwin kernel is capable of > launching 64bit processes. > Thus, there is an m64 multi-lib for powerpc-darwin, which is built by > default for GCC (and, for that multi-lib, the 64 bit locks are available). At > present, bootstrap is failing while building this multi-lib. > > With the following, bootstrap completed on powerpc-apple-darwin9, and > make check-ada shows no new fails. > Should I apply it? Looks good to me, go ahead, although I'm a bit surprised that you got an error, can you clarify what error you got? > Iain > > gcc/ada: > > * system-darwin-ppc64.ads: Add Support_Atomic_Primitives, > set to True.
