Checking for python_dll makes pip installation impossible if you need to override python_dll

[nugend]

Steps to reproduce the issue

install pyq through pip on a system where python has been built statically

You can attempt to override the python_dll path by using --global-options=configure --global-options="--python-dll=/my/path/to/libs" but it will fail because pip install runs python setup.py egg_info before running python setup.py install

Expected result

Don't throw an error when checking for python_dll in commands that don't require it.

[sashkab]

@nugend — we created template in order to speed up troubleshooting steps. Please answer following questions, so we could troubleshoot your issue.

• Which operating system are you using (if Linux, please provide flavour of it, i.e RedHat, CentOS or Ubuntu), is it 32-bit, or 64-bit?
• Which version of PyQ are you running? You can use pyq --versions or pip list | grep pyq.
• Which version of kdb+ are you using, is it 32-bit or 64-bit?
  • If on 64-bit, is your QLIC set? Please provide output env | grep QLIC on linux/macOS, or set|grep QLIC on Windows.
• Did you use virtual environment to install PyQ? If not, why?
• Where is your QHOME? Please provide output env | grep QHOME on linux/macOS, or set|grep QHOME on Windows.
• Do you use Conda? If so, what version?

Please provide steps to reproduce the issue.

Please provide actual result of installation of PyQ.

[nugend]

Oh, I shot my troubles already. This was for your benefit.