2010-10-07  Robert Dewar  <dewar@adacore.com>

	* sem_attr.adb: Minor reformatting.
	* einfo.ads, einfo.adb (Is_Ada_2012_Only): New flag
	* itypes.adb (Create_Null_Excluding_Itype): Set Is_Ada_2012_Only flag
	properly.
	* lib-xref.adb (Generate_Reference): Warn on use of Ada 2012 entity in
	non-Ada 2012 mode.
	* opt.ads (Warn_On_Ada_2012_Compatibility): New flag
	* sem_ch3.adb (Analye_Subtype_Declaration): Inherit Is_Ada_2012_Only
	* sem_ch7.adb (Preserve_Full_Attributes): Preserve Is_Ada_2012_Only
	flag.
	* sem_prag.adb (Analyze_Pragma, case Ada_12/Ada_2012): Allow form with
	argument.
	* sem_type.adb (Disambiguate): Deal with Is_Ada_2012_Only.
	* sem_warn.adb (Warn_On_Ada_2012_Compatibility): New flag, treated
	same as 2005 flag.

2010-10-07  Javier Miranda  <miranda@adacore.com>

	* a-tags.ads: Use new support for pragma Ada_2012 with function
	Type_Is_Abstract.

From-SVN: r165082