Preprocessing may call Error_Msg though Current_Source_Unit is not
initialized. When gnat1 is compiled with gnatVa, this leads to a
Constraint_Error.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* sinput.ads: Initialize Current_Source_Unit to No_Unit.diff --git a/gcc/ada/sinput.ads b/gcc/ada/sinput.ads
--- a/gcc/ada/sinput.ads
+++ b/gcc/ada/sinput.ads
@@ -412,10 +412,10 @@ package Sinput is
-- Initialized so that some tools (such as gprbuild) can be built with
-- -gnatVa and pragma Initialize_Scalars without problems.
- Current_Source_Unit : Unit_Number_Type;
- -- Unit number of source file currently being scanned. The special value
- -- of No_Unit indicates that the configuration pragma file is currently
- -- being scanned (this has no entry in the unit table).
+ Current_Source_Unit : Unit_Number_Type := No_Unit;
+ -- Unit number of source file currently being scanned. Initialized to
+ -- No_Unit for pre-processing and the configuration pragma file scanning,
+ -- since both stages have no corresponding entry in the unit table.
Source_gnat_adc : Source_File_Index := No_Source_File;
-- This is set if a gnat.adc file is present to reference this file
