Bug#789807: [alpha] cmake: testsuite failure: compiler feature "c_function_prototypes" is not known to C compiler

[Andreas Cadhalpun <andreas.cadhalpun@googlemail.com>]

Source: cmake
Version: 3.2.2-2
Severity: important
X-Debbugs-CC: debian-alpha@lists.debian.org

Dear Maintainer,

cmake failed to build on alpha with a testsuite failure:
CMake Error in CMakeLists.txt:
  The compiler feature "c_function_prototypes" is not known to C compiler

  "GNU"

  version 4.9.2.


CMake Error in CMakeLists.txt:
  The compiler feature "cxx_aggregate_default_initializers" is not known to
  CXX compiler

  "GNU"

  version 4.9.2.

I'm not sure why cmake expects these compiler features to be present,
but I hope they are not essential for cmake.
So could you please change the testsuite to not expect these features on alpha?
Due to the tight dependency on the arch:all cmake-data, the outdated cmake binary
is uninstallable on alpha, which blocks a bunch of other packages.

Best regards,
Andreas