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[Ada] gnatlink modify target of executable symbolic link

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Vincent Celier <celier at adacore dot com>
Date: Mon, 30 Nov 2009 11:07:48 +0100
Subject: [Ada] gnatlink modify target of executable symbolic link

On some platforms, such as Solaris, when an existing executable is a
symbolic link, gnatlink modify the target of the symbolic link. This
patch ensures that the symbolic link is replaced with a standard file.

The test for this is to invoke gnatlink on Solaris to update an
executable that is a symbolic link. The symbolic link should be
replaced with a standard file and the target of the symbolic link
should not be modified.

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

2009-11-30  Vincent Celier  <celier@adacore.com>

	* gnatlink.adb: Delete an eventual existing executable file, in case it
	is a symbolic link, to avoid modifying the target of the symbolic link.

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