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Subject:	Re: python binary retrieved via (cygwin) git clone does not execute - error 127
From:	Duane Ellis <duane AT duaneellis DOT com>
In-Reply-To:	<loom.20150624T153415-310@post.gmane.org>
Date:	Wed, 24 Jun 2015 08:18:33 -0700
Cc:	cygwin AT cygwin DOT com
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References:	<loom DOT 20150624T153415-310 AT post DOT gmane DOT org>
To:	Rick Springob <rspringob AT gmail DOT com>
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> The problem has only been seen with the git 
> that ships with 64-bit cygwin.

Use “ldd” - against the executable, determine the exact file (absolute path) of every dll that is used/required.

Including any missing DLLs.

You might also need to walk through your “Python Library” (where all of the python loadable modules are stored)
Remember: LDD will only tell you the DLLs that are used, it will not tell you about the modules that are loaded.

Use a “DLL Explorer” program to determine exactly what type of DLL  (32bit or 64bit) of each DLL.
Examples: Dependancy Walker, ‘DumpBin” - there are a number of tools that help

Painful process :-(  I have ran into this many times with other things.

have also run into problems with Python DLLs built with different versions of Visual Studio.
(The C runtime library is different)

In the end, I have had to put a shell wrapper around Python - so that it would *change/reset” various Python ENV variables.

With multiple versions of python (32,64, 2.7, 3.0, windows, cygwin, local-build) nothing is consistent.

Again painful.




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