+2010-10-04 Vincent Celier <celier@adacore.com>
+
+ * frontend.adb: Set Lib.Parsing_Main_Extended_Source to True before
+ loading the main source, so that if it is preprocessed and -gnateG is
+ used, the preprocessed file is written.
+ * lib.ads (Analysing_Subunit_Of_Main): New global variable to indicate
+ if a subunit is from the main unit when it is loaded.
+ * sem_ch10.adb (Analyze_Proper_Body): Set Lib.Analysing_Subunit_Of_Main
+ to True before loading a subunit.
+ * sem_ch12.adb (Copy_Generic_Node): Set Lib.Analysing_Subunit_Of_Main
+ to True when the main is a generic unit before loading one of its
+ subunits.
+ * sinput-l.adb (Load_File): If -gnateG is used, write the preprocessed
+ file only for the main unit (spec, body and subunits).
+