On 2016-07-31 01:09, Simon King wrote:
When trying to build the old-style version of my modular group
cohomology spkg, I now get:
pGroupCohomology/resolution.c:279:28: fatal error: struct_signals.h: No
such file or directory
#include "struct_signals.h"
The problem is this line in setup.py:
from Cython.Distutils import build_ext
This "build_ext" command is an old and semi-broken way to compile Cython
files. In fact, newer versions of Cython have an improved "build_ext"
command and give the warning
/usr/local/src/sage-git/local/src/cython/Cython/Distutils/build_ext.py:20:
UserWarning: Cython.Distutils.build_ext does not properly handle
dependencies and is deprectated. Use Cython.Build.build_ext instead.
The right way to compile Cython files is using cythonize(). But
unfortunately I cannot find the Cython docs, so I cannot point you to
the documentation for that.
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