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[Ada] g-expect improvement

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Pascal Obry <obry at adacore dot com>
Date: Tue, 28 Jul 2009 09:30:32 +0200
Subject: [Ada] g-expect improvement

On Windows only it is required to keep a copy of the original
standard handles (stdin, stdout, stderr) as we need to restore
them after calling the child process.

Not doing this on UNIX will also ensure that e.g. no copies of locked
file descriptors are kept.

Tested on x86_64-pc-linux-gnu, committed on trunk

2009-07-28  Pascal Obry  <obry@adacore.com>

	* g-expect.adb: Record standard handles only on Windows.

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