In Sage versions 5.6, 5.7, and now in 5.8 too, installing the optional
package cbc-2.7.5 doesn't work.
Some details: I always install sage from source on an intel 64 bit machine
under Ubuntu. sage -i cbc-2.7.5 works fine. Doing sage -b afterwards yields:
Building sage/numerical/backends/coin_backend.pyx because it depends on
../../local/include/coin/CbcStrategy.hpp.
Executing 1 command (using 1 thread)
cython --gdb --cplus --old-style-globals --embed-positions --directive
cdivision=True,autotestdict=False,fast_getattr=True
-I/home/mueller/local/sage-5.8/devel/sage-main -o
sage/numerical/backends/coin_backend.cpp
sage/numerical/backends/coin_backend.pyx
Error compiling Cython file:
------------------------------------------------------------
...
cdef extern from "../../local/include/coin/CbcStrategy.hpp":
cdef cppclass CbcStrategy:
pass
cdef cppclass CbcStrategyDefault(CbcStrategy):
CbcStrategyDefault(int cutsOnlyAtRoot=?, int numberStrong = ?, int
numberBeforeTrust = ?, int printLevel = ?)
^
------------------------------------------------------------
sage/numerical/backends/coin_backend.pxd:29:46: Expected an identifier or
literal
Error running command, failed with status 256.
Error installing modified sage library code.
Am I doing something wrong?
-- Peter Mueller
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