On 20/11/16 16:26, Mark G wrote: > Hmmm. I took a look and didn't see anything obvious. It should be > pulling libstdc++ from the install directory of GCC. I find it odd > it's reporting multiple definitions within the same SO. > > Anything I missed that a second pair of eyes sees? So do I. Try using -Wl,-Map,mapfile. That should explain what is happening. Turn some things off. -fno-lto It is possible you're looking at linker bugs or the linker has been# miscompiled. Keep an open mind. Andrew.