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Message-ID: <3dc5b19f876e7fa109e7e61dea8463ce748630eb.camel@cygwin.com>
Subject: Re: Python extraneous dependencies
From: Yaakov Selkowitz <yselkowitz@cygwin.com>
To: cygwin@cygwin.com
Date: Tue, 26 Mar 2019 10:08:27 -0400
In-Reply-To: <5c9990e4.1c69fb81.48ecd.ebeb@mx.google.com>
References: <a22c262a6916033450bc011dc181bc6f553a9baf.camel@cygwin.com>	 <5c9990e4.1c69fb81.48ecd.ebeb@mx.google.com>
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On Mon, 2019-03-25 at 19:39 -0700, Steven Penny wrote:
> On Sun, 24 Feb 2019 17:42:36, Yaakov Selkowitz wrote:
> > On Sat, 2019-02-23 at 16:29 -0800, Steven Penny wrote:
> > > I noticed that "python36" requires "binutils".
> > 
> > This is needed for ctypes.util.find_library().  FWIW, on Linux, not
> > only binutils is used, but also gcc.
> 
> Are you sure about that? 

Of course I am.

> It seems that function doesnt even work:
> 
> $ python3.6 -q
> > > > from ctypes.util import find_library
> > > > print(find_library('z'))
> None

WFM (returns cygz.dll), do you have the respective -devel packages
installed?  Those are also required for find_library.

> > > > print(find_library('cygz'))
> None
> > > > print(find_library('z.dll'))
> None
> > > > print(find_library('cygz.dll'))
> None

The 'cygz' forms won't work, but that's to be expected.

> Also see this post:
> 
> https://cygwin.com/ml/cygwin/2019-02/msg00432.html

This is incorrect, look at ctypes/util.py and you will see that.

--
Yaakov


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