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Re: Recent libstdc++ regression on i686-linux: abi/cxx_runtime_only_linkage.cc
Hi,
What macro do I switch on? _GLIBCXX_ATOMIC_BUILTINS_4?
Yes, should be safe for static switching. I think you should consider
also the option of having less stuff exported from libsupc++: if you
somehow manage to have the different code paths in the headers, then you
can dynamically switch on |__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4, which
changes depending on the actual compiler switches (i.e., it's defined if
on x86_linux, you use -march=i486)|
Anyway, I will be waiting for concrete proposals: also make sure that
if, on a specific target, parts of N2179 are not available users
understand it, easily, ideally with a compile-time error.
|||
|Paolo.