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[Ada] GNAT.Compiler_Version and LTO 

gcc/ada/

	* bindgen.adb (Gen_Output_File_Ada): Generate a new constant
	GNAT_Version_Address.
	* libgnat/g-comver.adb (GNAT_Version_Address): New;
	(GNAT_Version): Use GNAT_Version_Address to disable LTO warning.
This commit is contained in:
Arnaud Charlet 2021-03-12 07:57:03 -05:00 committed by Pierre-Marie de Rodat
parent 07537fe632
commit 4153c75471
2 changed files with 15 additions and 2 deletions
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6
gcc/ada/bindgen.adb
View File

@ -2388,7 +2388,11 @@ package body Bindgen is
Gnat_Version_String &
""" & ASCII.NUL;");
WBI (" pragma Export (C, GNAT_Version, ""__gnat_version"");");
WBI ("");
WBI (" GNAT_Version_Address : constant System.Address := " &
"GNAT_Version'Address;");
WBI (" pragma Export (C, GNAT_Version_Address, " &
"""__gnat_version_address"");");
WBI ("");
Set_String (" Ada_Main_Program_Name : constant String := """);
Get_Name_String (Units.Table (First_Unit_Entry).Uname);

11
gcc/ada/libgnat/g-comver.adb
View File

@ -33,6 +33,8 @@
-- GNAT compiler used to compile the program. It relies on the generated
-- constant in the binder generated package that records this information.
with System;
package body GNAT.Compiler_Version is
Ver_Len_Max : constant := 256;
@ -43,8 +45,15 @@ package body GNAT.Compiler_Version is
-- This is logically a reference to Gnatvsn.Ver_Prefix but we cannot
-- import this directly since run-time units cannot WITH compiler units.
GNAT_Version_Address : constant System.Address;
pragma Import (C, GNAT_Version_Address, "__gnat_version_address");
GNAT_Version : constant String (1 .. Ver_Len_Max + Ver_Prefix'Length);
pragma Import (C, GNAT_Version, "__gnat_version");
pragma Import (Ada, GNAT_Version);
for GNAT_Version'Address use GNAT_Version_Address;
-- Use a level of indirection via __gnat_version_address to avoid LTO
-- type mismtch warnings between two string objects of potentially
-- different size.
-------------
-- Version --