2008-08-04  Vincent Celier  <celier@adacore.com>

	* gprep.adb (Process_One_File): Call Prep.Preprocess with a Boolean
	variable, but don't check the resulting value as it has no impact on
	the processing.
	
	* opt.ads:
	(Generate_Processed_File): New Boolean flag, set to True in the compiler
	when switch -gnateG is used.
	
	* prep.adb:
	(Preprocess): new Boolean out parameter Source_Modified. Set it to True
	when the source is modified by the preprocessor and there is no
	preprocessing errors.
	
	* prep.ads (Preprocess): new Boolean out parameter Source_Modified
	
	* sinput-l.adb:
	(Load_File): Output the result of preprocessing if the source text was
	modified.
	
	* switch-c.adb (Scan_Front_End_Switches): Recognize switch -gnateG
	
	* switch-m.adb (Normalize_Compiler_Switches): Normalize switch -gnateG
	
	* ug_words: Add VMS equivalent for -gnateG
	
	* vms_data.ads:
	Add VMS option /GENERATE_PROCESSED_SOURCE, equivalent to switch -gnateG

From-SVN: r138590