Yeh, thanks, I just noticed this:
On the Fedora nodes the following works `c++
-D_GLIBCXX_USE_CXX11_ABI=0 --std=c++11 -Wall test.cc -lrados`, and on
CentOS 7, either 0 or 1 works for the CXX11_ABI variable.
The docs say "When defined to a non-zero value [the CXX11_ABI
variable] the library headers will use the new C++11-conforming ABI
introduced in GCC 5, rather than the older ABI introduced in GCC 3.4".
Makes sense. I guess I expected issues like this to be filtered out /
caught through rpm magic. Know of any CMake magic macros that can turn
those flags on?
On Thu, Sep 14, 2017 at 2:31 PM, Sage Weil <sage@xxxxxxxxxxxx> wrote:
> On Thu, 14 Sep 2017, Noah Watkins wrote:
>> Running into some undefined references linking against librados in
>> Luminous. Installed using RPM repo instructions from Ceph docs. Note
>> this issue shows up on Fedora 23,24,25, but not on CentOS 7.
>
> It looks a bit like these are C++ ABI differences because you are using
> el7 libraries on an fc25 box, which probably has a different
> version of gcc, libraries, etc?
>
> sage
>
>
>> # Test program
>>
>> [root@0ac98bfcffa2 build]# cat test.cc
>> #include <rados/librados.hpp>
>>
>> int main(int argc, char **argv)
>> {
>> librados::IoCtx ioctx;
>> return ioctx.create("foo", true);
>> }
>>
>> # Linking error
>>
>> [root@0ac98bfcffa2 build]# c++ --std=c++11 -Wall test.cc -lrados
>> /tmp/cc4MZnFR.o: In function `main':
>> test.cc:(.text+0x51): undefined reference to
>> `librados::IoCtx::create(std::__cxx11::basic_string<char,
>> std::char_traits<char>, std::allocator<char> > const&, bool)'
>> collect2: error: ld returned 1 exit status
>>
>> # Looks like everything is installed correctly.
>>
>> [root@0ac98bfcffa2 build]# librados-config --version
>> ceph version 12.2.0 (32ce2a3ae5239ee33d6150705cdb24d43bab910c) luminous (rc)
>>
>> [root@0ac98bfcffa2 build]# rpm -qa | grep 'rados\|ceph'
>> python-rados-12.2.0-0.el7.x86_64
>> python-cephfs-12.2.0-0.el7.x86_64
>> ceph-selinux-12.2.0-0.el7.x86_64
>> ceph-osd-12.2.0-0.el7.x86_64
>> librados2-12.2.0-0.el7.x86_64
>> libradosstriper1-12.2.0-0.el7.x86_64
>> ceph-base-12.2.0-0.el7.x86_64
>> ceph-mds-12.2.0-0.el7.x86_64
>> ceph-mon-12.2.0-0.el7.x86_64
>> ceph-12.2.0-0.el7.x86_64
>> libcephfs2-12.2.0-0.el7.x86_64
>> ceph-common-12.2.0-0.el7.x86_64
>> ceph-mgr-12.2.0-0.el7.x86_64
>> librados-devel-12.2.0-0.el7.x86_64
>> --
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>>
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