Note that I attempted to patch this by adding the following to chromium/build_config.h:

...
#elif defined(__PPC64__)
#define ARCH_CPU_64_BITS 1
#define ARCH_CPU_BIG_ENDIAN 1
...

While this clears up the previous compiler warnings, two of the tests fail.

Running suite(s): CRC32C implementation
0%: Checks: 2, Failures: 2, Errors: 0
galerautils/tests/gu_crc32c_test.c:56:F:test:test_software:0: Input '123456789' resulted in 0x10065321, expected 0xe3069283
galerautils/tests/gu_crc32c_test.c:56:F:test:test_hardware:0: Input '123456789' resulted in 0x10065321, expected 0xe3069283

Need to investigate further.

This also affects fedora package.

I posted link to this ticket upstream.
Upstream bug tracker ticket https://bugs.launchpad.net/galera/+bug/1257803.

This is fixed in 25.3.12, but some arches require an additional patch due to -march=native.  Fedora 25.3.12-2 builds successfully on aarch64, ppc64*, and s390*:

http://arm.koji.fedoraproject.org/koji/buildinfo?buildID=328764
http://ppc.koji.fedoraproject.org/koji/buildinfo?buildID=353746
http://s390.koji.fedoraproject.org/koji/taskinfo?taskID=2004118
http://s390.koji.fedoraproject.org/koji/taskinfo?taskID=2004155

Please merge from master into epel7 and update.

*** Bug 1269628 has been marked as a duplicate of this bug. ***

Ryan,

Any objections to merging master into epel7 for the secondary arches?

galera-25.3.12-2.el7 has been submitted as an update to Fedora EPEL 7. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-c1f0e4564e

galera-25.3.12-2.el7 has been pushed to the Fedora EPEL 7 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2016-c1f0e4564e

galera-25.3.12-2.el7 has been pushed to the Fedora EPEL 7 stable repository. If problems still persist, please make note of it in this bug report.