[Python-modules-team] Bug#778077: python-numpy: ftbfs with GCC-5

[Matthias Klose]

Package: src:python-numpy
Version: 1:1.8.2-2
Severity: normal
Tags: sid stretch
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-5

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-5/g++-5, but succeeds to build with gcc-4.9/g++-4.9. The
severity of this report may be raised before the stretch release.

The full build log can be found at:
http://people.debian.org/~doko/logs/gcc5-20150205/python-numpy_1.8.2-2_unstable_gcc5.log
The last lines of the build log are at the end of this report.

To build with GCC 5, either set CC=gcc-5 CXX=g++-5 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t experimental install g++ 

Common build failures are C11 as the default C mode, new warnings
resulting in build failures with -Werror turned on, or new/dropped
symbols in Debian symbols files.  For other C/C++ related build failures
see the porting guide at http://gcc.gnu.org/gcc-5/porting_to.html

[...]
copying numpy/doc/io.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/__init__.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/jargon.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/ufuncs.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/structured_arrays.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/byteswapping.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/methods_vs_functions.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/internals.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/creation.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/constants.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/glossary.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/basics.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/indexing.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/howtofind.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
copying numpy/doc/subclassing.py -> build/lib.linux-x86_64-2.7-pydebug/numpy/doc
running build_clib
customize UnixCCompiler
customize UnixCCompiler using build_clib
building 'npymath' library
compiling C sources
C compiler: x86_64-linux-gnu-gcc -pthread -g -O0 -Wall -Wstrict-prototypes -fno-strict-aliasing -g -O0 -fstack-protector-strong -Wformat -Werror=format-security -fPIC

creating build/temp.linux-x86_64-2.7-pydebug
creating build/temp.linux-x86_64-2.7-pydebug/build
creating build/temp.linux-x86_64-2.7-pydebug/build/src.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7-pydebug/build/src.linux-x86_64-2.7/numpy
creating build/temp.linux-x86_64-2.7-pydebug/build/src.linux-x86_64-2.7/numpy/core
creating build/temp.linux-x86_64-2.7-pydebug/build/src.linux-x86_64-2.7/numpy/core/src
creating build/temp.linux-x86_64-2.7-pydebug/build/src.linux-x86_64-2.7/numpy/core/src/npymath
creating build/temp.linux-x86_64-2.7-pydebug/numpy
creating build/temp.linux-x86_64-2.7-pydebug/numpy/core
creating build/temp.linux-x86_64-2.7-pydebug/numpy/core/src
creating build/temp.linux-x86_64-2.7-pydebug/numpy/core/src/npymath
compile options: '-Inumpy/core/include -Ibuild/src.linux-x86_64-2.7/numpy/core/include/numpy -Inumpy/core/src/private -Inumpy/core/src -Inumpy/core -Inumpy/core/src/npymath -Inumpy/core/src/multiarray -Inumpy/core/src/umath -Inumpy/core/src/npysort -Inumpy/core/include -I/usr/include/python2.7_d -Ibuild/src.linux-x86_64-2.7/numpy/core/src/private -Ibuild/src.linux-x86_64-2.7/numpy/core/src/private -Ibuild/src.linux-x86_64-2.7/numpy/core/src/private -Ibuild/src.linux-x86_64-2.7/numpy/core/src/private -c'
x86_64-linux-gnu-gcc: build/src.linux-x86_64-2.7/numpy/core/src/npymath/npy_math_complex.c
x86_64-linux-gnu-gcc: build/src.linux-x86_64-2.7/numpy/core/src/npymath/npy_math.c
x86_64-linux-gnu-gcc: numpy/core/src/npymath/halffloat.c
x86_64-linux-gnu-gcc: build/src.linux-x86_64-2.7/numpy/core/src/npymath/ieee754.c
x86_64-linux-gnu-gcc-ar: adding 4 object files to build/temp.linux-x86_64-2.7-pydebug/libnpymath.a
sh: 1: x86_64-linux-gnu-gcc-ar: not found
error: Command "x86_64-linux-gnu-gcc-ar rc build/temp.linux-x86_64-2.7-pydebug/libnpymath.a build/temp.linux-x86_64-2.7-pydebug/build/src.linux-x86_64-2.7/numpy/core/src/npymath/npy_math.o build/temp.linux-x86_64-2.7-pydebug/build/src.linux-x86_64-2.7/numpy/core/src/npymath/ieee754.o build/temp.linux-x86_64-2.7-pydebug/build/src.linux-x86_64-2.7/numpy/core/src/npymath/npy_math_complex.o build/temp.linux-x86_64-2.7-pydebug/numpy/core/src/npymath/halffloat.o" failed with exit status 127sh: 1: x86_64-linux-gnu-gcc-ar: not found

[65416 refs]
dh_auto_build: python-dbg setup.py build --force returned exit code 1
make[1]: *** [override_dh_auto_build] Error 1
debian/rules:18: recipe for target 'override_dh_auto_build' failed
make[1]: Leaving directory '/«PKGBUILDDIR»'
make: *** [build-arch] Error 2
debian/rules:136: recipe for target 'build-arch' failed
dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2