+2010-10-26 Robert Dewar <dewar@adacore.com>
+
+ * opt.ads: Move documentation on checksum stuff here from prj-nmsc
+ * prj-nmsc.adb (Process_Project_Level_Array_Attributes): Move
+ documentation on checksum versions to opt.ads.
+
2010-10-26 Vincent Celier <celier@adacore.com>
* opt.ads (Checksum_Accumulate_Token_Checksum): New Boolean flag,
package Opt is
+ ----------------------
+ -- Checksum Control --
+ ----------------------
+
+ -- Checksums are computed for sources to check for sources being the same
+ -- from a compilation point of view (e.g. spelling of identifiers and
+ -- white space layout do not count in this computation).
+
+ -- The way the checksum is computed has evolved across the various versions
+ -- of GNAT. When gprbuild is called with -m, the checksums must be computed
+ -- the same way in gprbuild as it was in the GNAT version of the compiler.
+ -- The different ways are
+
+ -- Version 6.4 and later:
+
+ -- The Accumulate_Token_Checksum procedure is called after each numeric
+ -- literal and each identifier/keyword. For keywords, Tok_Identifier is
+ -- used in the call to Accumulate_Token_Checksum.
+
+ -- Versions 5.04 to 6.3:
+
+ -- For keywords, the token value were used in the call to procedure
+ -- Accumulate_Token_Checksum. Type Token_Type did not include Tok_Some.
+
+ -- Versions 5.03:
+
+ -- For keywords, the token value were used in the call to
+ -- Accumulate_Token_Checksum. Type Token_Type did not include
+ -- Tok_Interface, Tok_Overriding, Tok_Synchronized and Tok_Some.
+
+ -- Versions 5.02 and before:
+
+ -- No calls to procedure Accumulate_Token_Checksum (the checksum
+ -- mechanism was introduced in version 5.03).
+
+ -- To signal to the scanner whether Accumulate_Token_Checksum needs to be
+ -- called and what versions to call, the following Boolean flags are used:
+
+ Checksum_Accumulate_Token_Checksum : Boolean := True;
+ -- GPRBUILD
+ -- Set to False by gprbuild when the version of GNAT is 5.02 or before.
+
+ Checksum_GNAT_6_3 : Boolean := False;
+ -- GPRBUILD
+ -- Set to True by gprbuild when the version of GNAT is 6.3 or before.
+
+ Checksum_GNAT_5_03 : Boolean := False;
+ -- GPRBUILD
+ -- Set to True by gprbuild when the version of GNAT is 5.03 or before.
+
----------------------------------------------
-- Settings of Modes for Current Processing --
----------------------------------------------
-- GNATMAKE
-- Set to True when an object directory is specified with option -D
- Checksum_Accumulate_Token_Checksum : Boolean := True;
- -- GPRBUILD
- -- Set to False by gprbuild when the version of GNAT is 5.02 or before.
- -- There were no call to procedure Accumulate_Token_Checksum in these
- -- versions.
-
- Checksum_GNAT_6_3 : Boolean := False;
- -- GPRBUILD
- -- Set to True by gprbuild when the version of GNAT is 6.3 or before. For
- -- GNAT versions 5.04 to 6.3, Accumulate_Token_Checksum were called with
- -- the token values of the keywords, instead of Tok_Identifier for later
- -- versions, and Tok_Some was not in Token_Type.
-
- Checksum_GNAT_5_03 : Boolean := False;
- -- GPRBUILD
- -- Set to True by gprbuild when the version of GNAT is 5.03. For GNAT 5.04,
- -- Accumulate_Token_Checksum were called with the token values of the
- -- keywords, and Tok_Interface, Tok_Overriding, Tok_Synchronized and
- -- Tok_Some were not in Token_Type.
-
One_Compilation_Per_Obj_Dir : Boolean := False;
-- GNATMAKE, GPRBUILD
-- Set to True with switch --single-compile-per-obj-dir. When True, there
-- location.
type Name_Location is record
- Name : File_Name_Type; -- ??? duplicates the key
+ Name : File_Name_Type;
+ -- Key is duplicated, so that it is known when using functions Get_First
+ -- and Get_Next, as these functions only return an Element.
+
Location : Source_Ptr;
Source : Source_Id := No_Source;
Listed : Boolean := False;
-- found on the disk.
type Unit_Exception is record
- Name : Name_Id; -- ??? duplicates the key
+ Name : Name_Id;
+ -- Key is duplicated, so that it is known when using functions Get_First
+ -- and Get_Next, as these functions only return an Element.
+
Spec : File_Name_Type;
Impl : File_Name_Type;
end record;
Lang_Index.Config.Toolchain_Version :=
Element.Value.Value;
- if Lang_Index.Name = Name_Ada then
- -- The way the checksum is computed has evolved
- -- across the different versions of GNAT. When
- -- gprbuild is called with -m, the checksums need
- -- to be computed the same way in gprbuild as it
- -- was in the GNAT version of the compiler.
- -- The different ways are:
- -- - version 6.4 and later:
- -- procedure Accumulate_Token_Checksum is
- -- called after each numeric literal and each
- -- identifier/keyword. For keywords,
- -- Tok_Identifier is used in the call to
- -- Accumulate_Token_Checksum.
- -- - versions 5.04 to 6.3:
- -- for keywords, the token value were used in
- -- the call to Accumulate_Token_Checksum. Type
- -- Token_Type did not include Tok_Some.
- -- - versions 5.03:
- -- for keywords, the token value were used in
- -- the call to Accumulate_Token_Checksum. Type
- -- Token_Type did not include Tok_Interface,
- -- Tok_Overriding, Tok_Synchronized and
- -- Tok_Some.
- -- - versions 5.02 and before:
- -- no call to Accumulate_Token_Checksum.
- --
- -- To signal to the scanner that
- -- Accumulate_Token_Checksum needs to be called and
- -- what versions to call, 3 Booleans flags are used
- -- in Opt:
- -- - Checksum_Accumulate_Token_Checksum: True for
- -- versions 5.03 and later, False for 5.02 and
- -- before.
- -- - Checksum_GNAT_6_3: False for versions 6.4
- -- and later, True for versions 6.3 and before.
- -- - Checksum_GNAT_5_03: False for versions 5.04
- -- and later, True for versions 5.03 and before.
+ -- For Ada, set proper checksum computation mode
+ if Lang_Index.Name = Name_Ada then
declare
Vers : constant String :=
Get_Name_String (Element.Value.Value);
pragma Assert (Vers'First = 1);
begin
+ -- Version 6.3 or earlier
+
if Vers'Length >= 8
and then Vers (1 .. 5) = "GNAT "
and then Vers (7) = '.'
then
Checksum_GNAT_6_3 := True;
+ -- Version 5.03 or earlier
+
if Vers (6) < '5'
or else (Vers (6) = '5'
and then Vers (Vers'Last) < '4')
then
Checksum_GNAT_5_03 := True;
+ -- Version 5.02 or earlier
+
if Vers (6) /= '5'
or else Vers (Vers'Last) < '3'
then
Checksum_Accumulate_Token_Checksum :=
- False;
+ False;
end if;
end if;
end if;
projects / thirdparty / gcc.git / commitdiff
