The Conan GCC builds need to specify C++11 ABI explicitly:
************************* WARNING: GCC OLD ABI COMPATIBILITY ***********************
Conan detected a GCC version > 5 but has adjusted the 'compiler.libcxx' setting to
'libstdc++' for backwards compatibility.
Your compiler is likely using the new CXX11 ABI by default (libstdc++11).
If you want Conan to use the new ABI for the default profile, run:
$ conan profile update settings.compiler.libcxx=libstdc++11 default
Or edit '/root/.conan/profiles/default' and set compiler.libcxx=libstdc++11
************************************************************************************
The Conan GCC builds need to specify C++11 ABI explicitly:
Ref. #157