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[Ada] Use constructor mechanism to auto-initialize libraries

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, 4 Jul 2005 15:50:14 +0200
Subject: [Ada] Use constructor mechanism to auto-initialize libraries

Tested on i686-linux, committed on mainline.

Instead of automatically initializing dynamic Stand-Alone Libraries
through the init/fini mechanism, it is better to use the constructor
mechanism, which is more integrated with the the exception mechanism
of gcc. The new gnatbind switch -a is used for those platforms that
support this mechanism.

2005-07-04  Vincent Celier  <celier@adacore.com>

	* mlib-prj.adb (Auto_Initialize): New constant String
	(SALs_Use_Constructors): New Boolean function
	(Build_Library): Call gnatbind with Auto_Initialize switch when
	SALs_Use_Constructors returns True.

	* mlib-tgt.ads: Minor reformatting

	* mlib-utl.ads: Minor reformatting

	* opt.ads: (Use_Pragma_Linker_Constructor): New Boolean flag

Attachment: difs.12
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