python2

Currently GHC assumes that the python command defaults to Python 2.x, but on some systems (e.g., Arch Linux) it's already Python 3.x. This breaks the testsuite completely. According to http://www.python.org/dev/peps/pep-0394/ on

• nix systems one should prefer python2 command. I'm not very familiar with the

build system of GHC but my quick solution is to:

• make configure.ac check for python2
• make the testsuite also try python2 first
• remove the shebang line from calibrate (testsuite/timeout) since make already calls it with the value

of PYTHON variable

• change the shebang in timeout.py (in testsuite/timeout) to use python2, which

should be safe on Unix like systems (and on Windows we don't actually use timeout.py)

Btw is the PythonCmd (defined by configure.ac) actually used somewhere -- I can't seem to find where...

Trac metadata

Trac field	Value
Version	7.6.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Build System
Test case
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