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[Ada] Lower severity of the program's return value in some common cases

From: Arnaud Charlet <charlet at adacore dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Vasiliy Fofanov <fofanov at adacore dot com>
Date: Fri, 7 Nov 2014 08:59:58 -0500
Subject: [Ada] Lower severity of the program's return value in some common cases
Authentication-results: sourceware.org; auth=none

In some common use cases, gnatls used to return E_Fatal error code, which was
unfriendly for analysis. It has been changed as follows:
 "gnatls -v" and default runtime exists, or
 "gnatls -v --RTS=<good runtime path>" - now returns E_Success
 "gnatls -v" and no default runtime exists - now returns E_Warnings
 "gnatls", "gnatls -h" - now returns E_Success

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

2014-11-07  Vasiliy Fofanov  <fofanov@adacore.com>

	* gnatls.adb: Lower severity of the program's return value in
	some common cases.

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