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[Ada] All duplicate units in a project now reported

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: Fri, 8 Oct 2010 12:45:29 +0200
Subject: [Ada] All duplicate units in a project now reported

If there are several duplicate units in a project, they are all reported once.
The test for this is to invoke gnatmake on a project with duplicate units "a"
and "b" in the same source directory subtree (".../**"). Both duplicate units
"a" and "b" should be reported.

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

2010-10-08  Vincent Celier  <celier@adacore.com>

	* prj-nmsc.adb (Add_Source): Report all duplicate units and source file
	names.  Do not report the same duplicate unit several times.
	* prj.ads (Source_Data): New Boolean component Duplicate_Unit,
	defaulted to False, to avoid reporting the same unit as duplicate
	several times.

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