The second test rebuild of Zesty Zapus was started on March 22 for all architectures, all components (main component and seeded packages finished, unseeded packages still building).
For arm64 and armhf the gcc-6 packages are based on the Linaro 6-2017.03 snapshot.
Results (please also look at the superseded builds) can be found at
http://qa.ubuntuwire.org/ftbfs/rebuilds/test-rebuild-20170322.1-zesty.html
Additional build failures for packages in zesty-proposed (not yet in zesty) can be found at http://qa.ubuntuwire.com/ftbfs/
Please help fixing the build failures.
Another test rebuild using a snapshot of GCC 7 (not yet released) as the default can be found at http://qa.ubuntuwire.org/ftbfs/rebuilds/test-rebuild-20170322.1-gcc7-zesty.h...
GCC 7 is not yet released and will not be used as the default compiler for the 17.04 release. GCC 7 packages can be found in the ubuntu-toolchain-r/test PPA.
Matthias