2007-04-20  Pascal Obry  <obry@adacore.com>

	* gnatchop.adb (Write_Source_Reference_Pragma): Change implementation
	to use Stream_IO.File_Type. This is needed to make use of the UTF-8
	encoding support of Stream_IO.
	(Write_Unit): Idem.

	* adaint.h, adaint.c (__gnat_os_filename): New routine. Returns the
	filename and corresponding encoding to match the OS requirement.
	(__gnat_file_exists): Do not call __gnat_stat() on Windows as this
	routine will fail on specific devices like CON: AUX: ...

	PR ada/29856: Add missing braces

From-SVN: r124347