[reSIProcate] GCC 6 build issues

[Daniel Pocock]

Fedora did an automated rebuild of all packages with GCC 6 and
reSIProcate failed:

https://kojipkgs.fedoraproject.org//work/tasks/1072/12881072/

Data.cxx: At global scope:
Data.cxx:760:50: error: 'bool resip::operator<(const resip::Data&, const
resip::Data&)' should have been declared inside 'resip'
 resip::operator<(const Data& lhs, const Data& rhs)
                                                  ^
Makefile:733: recipe for target 'Data.lo' failed


There could be more errors, they stopped on the first one.

Has anybody already been looking at GCC 6 builds?

There are some comments here about the rebuild, compile flags:

https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/DH7M2ADHM6XCRFTRRSKZD6MWFUJKHBZK/