sem_ch3.adb, [...]: Minor reformatting.

2010-10-26  Robert Dewar  <dewar@adacore.com>

	* sem_ch3.adb, sem_ch4.adb, sem_disp.adb, switch-c.adb: Minor
	reformatting.
	* gnat_ugn.texi: Document -gnateP switch.

From-SVN: r165953

gcc/ada/ChangeLog

 2010-10-26  Robert Dewar  <dewar@adacore.com>
 
+	* sem_ch3.adb, sem_ch4.adb, sem_disp.adb, switch-c.adb: Minor
+	reformatting.
+	* gnat_ugn.texi: Document -gnateP switch.
+
+2010-10-26  Robert Dewar  <dewar@adacore.com>
+
 	* opt.ads (Treat_Categorization_Errors_As_Warnings): New flag
 	* sem_cat.adb (Check_Categorization_Dependencies):
 	Use Check_Categorization_Dependencies

gcc/ada/gnat_ugn.texi

@@ -4144,6 +4144,14 @@ Specify a preprocessing data file
 @end ifclear
 (@pxref{Integrated Preprocessing}).
 
+@item -gnateP
+@cindex @option{-gnateP} (@command{gcc})
+Turn categorization dependency errors into warnings.
+Ada requires that units that WITH one another have compatible categories, for
+example a Pure unit cannto WITH a Preelaborate unit. If this switch is used,
+these errors become warnings (which can be ignored, or suppressed in the usual
+manner). This can be useful in some specialized circumstances such as the
+temporary use of special test software.
 @item -gnateS
 @cindex @option{-gnateS} (@command{gcc})
 Generate SCO (Source Coverage Obligation) information in the ALI

gcc/ada/sem_ch3.adb

@@ -1588,8 +1588,8 @@ package body Sem_Ch3 is
                      Derived_Type => Tagged_Type,
                      Parent_Type  => Iface);
                   Set_Alias (New_Subp, Prim);
-                  Set_Is_Abstract_Subprogram (New_Subp,
-                    Is_Abstract_Subprogram (Prim));
+                  Set_Is_Abstract_Subprogram
+                    (New_Subp, Is_Abstract_Subprogram (Prim));
                end if;
 
                Derive_Subprogram

gcc/ada/sem_ch4.adb

@@ -2155,9 +2155,7 @@ package body Sem_Ch4 is
 
       P_T := Base_Type (Etype (P));
 
-      if Is_Entity_Name (P)
-        and then Present (Entity (P))
-      then
+      if Is_Entity_Name (P) and then Present (Entity (P)) then
          U_N := Entity (P);
 
          if Is_Type (U_N) then

gcc/ada/sem_disp.adb

@@ -1818,7 +1818,7 @@ package body Sem_Disp is
             end if;
 
             --  Check if E covers the interface primitive (includes case in
-            --  which E is an inherited private primitive)
+            --  which E is an inherited private primitive).
 
             if Is_Interface_Conformant (Tagged_Type, Iface_Prim, E) then
                return E;

gcc/ada/switch-c.adb

@@ -567,7 +567,13 @@ package body Switch.C is
                Set_GNAT_Mode_Warnings;
                Set_GNAT_Style_Check_Options;
 
-               --  Other special modes set by -gnatg
+               --  Suppress categorization errors. The run-time has several
+               --  instances of violations of the categorization errors (e.g.
+               --  Pure units withing Preelaborate units. These violations are
+               --  harmless in the cases where we intend them, and we suppress
+               --  the warnings with Warnings (Off). In cases where we do not
+               --  intend the violation, warnings are errors in -gnatg mode
+               --  anyway, so we will still get an error.
 
                Treat_Categorization_Errors_As_Warnings := True;