On Mon, Dec 25, 2017 at 10:43 PM, kefu chai <tchaikov@xxxxxxxxx> wrote: > On Sat, Dec 23, 2017 at 5:46 PM, Xuehan Xu <xxhdx1985126@xxxxxxxxx> wrote: >> Hi, everyone. >> >> I'm using CentOS 7 with devtoolset-7 to build ceph. However, I found >> that the list::size() in my ceph executables is still counting the >> number of nodes. It's so odd, I googled it, and found that this may >> have something to do with _GLIBCXX_USE_CXX11_ABI. But even if I >> explicitly set _GLIBCXX_USE_CXX11_ABI to 1 when building ceph, the >> problem remains. It seems that _GLIBCXX_USE_CXX11_ABI is set to 0 by >> gcc no matter how I build the source code, even with >> -D_GLIBCXX_USE_CXX11_ABI=1. > > Xuehan, thanks for testing! > > turns out the gcc-7 in devtoolset is compiled with > "--with-default-libstdcxx-abi=gcc4-compatible", see the output of "g++ > -v", so it is using "_GLIBCXX_USE_CXX11_ABI=0", you can by checking > /opt/rh/devtoolset-7/root/usr/include/c++/7/x86_64-redhat-linux/bits/c++config.h > . > > in other words, we still need https://github.com/ceph/ceph/pull/18755. hmm, probably not. add_definitions(-D_GLIBCXX_USE_CXX11_ABI=1) and set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fabi-version=0") might help. I will give it a try tomorrow. -- Regards Kefu Chai -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
