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Subject:	Re: Strange errors running gcc tests on Cygwin
To:	cygwin AT cygwin DOT com, Daniel Santos <daniel DOT santos AT pobox DOT com>
References:	<8fa02a72-e684-2ead-eacb-a5347d7594ae AT pobox DOT com> <82b31abc-7b7f-8f13-fc22-521c9ef84abf AT pobox DOT com> <8bda181f-f0bc-b0dc-2d2d-1bb17031ccee AT gmail DOT com> <b6c0f704-1f04-63ea-8220-ee30d623a9d6 AT pobox DOT com> <583230d9-f45c-aaa0-ed77-5c50863406f5 AT gmail DOT com> <9b872914-d9cf-378e-6eec-96c175a61ffe AT pobox DOT com> <ab35a49e-93e3-4384-bf81-3e8ac99b7194 AT gmail DOT com> <7372df4f-c55d-f9a3-325d-3f8800d67d98 AT pobox DOT com>
From:	David Billinghurst <dbcygwin AT gmail DOT com>
Message-ID:	<aab8c02e-2fe7-8ebf-5f3b-126e0ea0a745@gmail.com>
Date:	Wed, 8 Mar 2017 11:36:00 +1100
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On 8/03/2017 10:25, Daniel Santos wrote:

> My concern is with the dynamic portion of this behavior -- what is 
> affected by environment variables.

Many years ago I ran a nightly build/test of gcc under cygwin and 
reported the results to gcc-testresults.  There may be is discussion on 
the gcc mailing lists from c2000-2005.  If you search "site:gcc.gnu.org 
David Billinghurst cygwin" you ??might?? find something relevant.

 From memory, I got it all working by

  * building gcc and friends
  * using find to locate all the .exe and .dll files in the build tree
  * worked out by trial and error which files were needed at run time by
    the test suite.
  * setting PATH when running the testsuite so that the directories
    containing (new) required .exe and .dll were in front of any system
    directories
  * making sure that PATH wasn't reset by the testsuite
  * looking at places where LD_LIBRARY_PATH was set/modified by the
    testsuite and checking if cygwin needed PATH to match
  * (submitting patched to fix gcc testsuite under cygwin)

Once that was done it all "just worked" until it broke again. Good luck.





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