debug.adb: Document new debug flag -gnatd.1.

debug.adb: Document new debug flag -gnatd.1.

2015-03-02  Robert Dewar  <dewar@adacore.com>

	* debug.adb: Document new debug flag -gnatd.1.
	* einfo.ads, einfo.adb (Has_Nested_Subprogram): New flag.
	(Has_Uplevel_Reference): New flag (Is_Static_Type): New flag.
	(Uplevel_Reference_Noted):New flag (Uplevel_References): New field.
	* elists.ads elists.adb (List_Length): New function.
	* exp_ch6.adb (Expand_N_Subprogram_Body): Call Unnest_Subprogram
	when appropriate (Process_Preconditions): Minor code
	reorganization and reformatting
	* exp_unst.ads, exp_unst.adb: New files.
	* gnat1drv.adb (Adjust_Global_Switches): Set
	Unnest_Subprogram_Mode if -gnatd.1
	* namet.ads, namet.adb (Name_Find_Str): New version of Name_Find with
	string argument.
	* opt.ads (Unnest_Subprogram_Mode): New flag.
	* par-ch3.adb (P_Identifier_Declarations): Fixes to -gnatd.2 handling.
	* sem_ch6.adb (Analyze_Subprogram_Body_Helper): Set
	Has_Nested_Subprogram flag.
	* sem_ch8.adb (Find_Direct_Name): New calling sequence for
	Check_Nested_Access.
	(Find_Selected_Component): Minor comment addition.
	* sem_util.adb (Check_Nested_Access): New version for use with Exp_Unst.
	(Note_Possible_Modification): New calling sequence for
	Check_Nested_Access.
	* sem_util.ads (Check_Nested_Access): New version for use with Exp_Unst.
	* gcc-interface/Make-lang.in (GNAT1_OBJS): Add exp_unst.o

From-SVN: r221109