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[Ada] Improve list of files in bug box

This patch provides a more robust mechanism for printing out the list of files
in a bug box. It also includes a new debugging switch, -gnatd.n, which prints
out the file list as the compiler goes along, as opposed to waiting until the

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

2009-05-06  Bob Duff  <>

	*, table.adb (Append_All): New convenience procedure for
	appending a whole array.

	* comperr.adb (Compiler_Abort): Mention the -gnatd.n switch in the bug
	box message. Call Osint.Dump_Source_File_Names to print out the file
	list, instead of rummaging around in various data structures.

	* debug.adb: New switch -gnatd.n, to print source file names as they
	are read.

	* Add parameters for Osint.File_Name_Chars.

	*, osint.adb (Dump_Source_File_Names): New procedure to print
	out source file names during a "bug box".
	(Include_Dir_Default_Prefix): Use memo-izing to avoid repeated new/free.
	(Read_Source_File): Print out the file name, if requested via -gnatd.n.
	If it's not part of the runtimes, store it for later printing by

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