[with patch; positive review] Building the Sage library with parallel make is broken on OSX 10.4

[mabshoff]

exporting MAKE=make -j2 leads to

Traceback (most recent call last):
  File "setup.py", line 1545, in <module>
    cython(deps, ext_modules)
  File "setup.py", line 1311, in cython
    execute_list_of_commands(command_list)
  File "setup.py", line 1403, in execute_list_of_commands
    n = 2*number_of_cpus()
TypeError: unsupported operand type(s) for *: 'int' and 'NoneType'
sage: There was an error installing modified sage library code.

on OSX 10.4.

This is caused by #3765.

Cheers,

Michael

[mabshoff]

ok, the issue is simple enough and an extra "\n" in the output:

>>> import os
>>> os.popen2("sysctl -n hw.ncpu")[1].read()
'2\n'

Cheers,

Michael

[mabshoff]

Ok, the above wasn't the issue. Strange that number_of_cpus() returns None.

Cheers,

Michael

[mabshoff]

The patch fixes the issue.

Cheers,

Michael

[mabshoff]

Merged in Sage 3.2.alpha2