[Bug 1484666] Re: scan-build is unhappy with python3.5-dev (3.5.0~rc1-1): error: _Atomic cannot be applied to incomplete type 'void'

[Jason Gerard DeRose]

Hmm, interestingly this scan-build error is only happening when I
instrument the build with asan, ubsan.

Although that still doesn't totally explain it as it works fine when
building against 3.4.3.

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Title:
  scan-build is unhappy with python3.5-dev (3.5.0~rc1-1): error: _Atomic
  cannot be applied to incomplete type 'void'

Status in python3.5 package in Ubuntu:
  New

Bug description:
  I use Clang's scan-build to do static analysis on my Python3 C
  extensions during their Debian package build.

  Now that Python 3.5rc1 has hit Wily, this is failing when building
  against Python 3.5.

  But it wasn't failing against 3.5b4, still isn't failing against
  3.4.3.

  No changes were made in my C code in the mean time, so I'm pretty sure
  I'm not to blame :P

  Full build log is here:

  https://launchpadlibrarian.net/214403448/buildlog_ubuntu-wily-
  amd64.degu_0.14.0~alpha~bzr361~ubuntu15.10.1_BUILDING.txt.gz

  And here's the interesting excerpt:

  + DEGU_INSTRUMENT_BUILD=true scan-build --status-bugs -analyze-headers python3.5 setup.py build_ext -i
  scan-build: Using '/usr/lib/llvm-3.6/bin/clang' for static analysis
  running build_ext
  building 'degu._base' extension
  /usr/share/clang/scan-build-3.6/ccc-analyzer -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I/usr/include/python3.5m -c degu/_base.c -o build/temp.linux-x86_64-3.5/degu/_base.o -std=gnu11 -Werror -pedantic-errors -Wsign-compare -Wsign-conversion -fsanitize=address -fsanitize=undefined -fsanitize=shift -fsanitize=integer-divide-by-zero -fsanitize=unreachable -fsanitize=vla-bound -fsanitize=null -fsanitize=return -fsanitize=signed-integer-overflow
  In file included from degu/_base.c:24:
  In file included from degu/_base.h:24:
  In file included from /usr/include/python3.5m/Python.h:53:
  /usr/include/python3.5m/pyatomic.h:35:5: error: _Atomic cannot be applied to incomplete type 'void' 
      _Atomic void *_value;

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: python3.5-dev 3.5.0~rc1-1
  ProcVersionSignature: Ubuntu 4.1.0-3.3-generic 4.1.3
  Uname: Linux 4.1.0-3-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.18-0ubuntu6
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu Aug 13 13:33:19 2015
  SourcePackage: python3.5
  UpgradeStatus: No upgrade log present (probably fresh install)

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