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sem_warn.adb (Check_Use_Clause): Don't give no entities used msg if errors found.

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2014-01-22  Robert Dewar  <dewar@adacore.com>

	* sem_warn.adb (Check_Use_Clause): Don't give no entities used
	msg if errors found.
	(Check_One_Unit): Same change.

2014-01-22  Robert Dewar  <dewar@adacore.com>

	* ug_words: Add missing/wrong entries for VMS warning switches.
	* sem_prag.adb (Check_Duplicate_Pragma): Avoid flagging parent type.

From-SVN: r206920
This commit is contained in:
Robert Dewar 2014-01-22 11:18:34 +00:00 • committed by Arnaud Charlet
parent 54533a0b36
commit 1250f80269
6 changed files with 425 additions and 211 deletions
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11
gcc/ada/ChangeLog
View file

@ -1,3 +1,14 @@
2014-01-22 Robert Dewar <dewar@adacore.com>
* sem_warn.adb (Check_Use_Clause): Don't give no entities used
msg if errors found.
(Check_One_Unit): Same change.
2014-01-22 Robert Dewar <dewar@adacore.com>
* ug_words: Add missing/wrong entries for VMS warning switches.
* sem_prag.adb (Check_Duplicate_Pragma): Avoid flagging parent type.
2014-01-22 Jerome Guitton <guitton@adacore.com>
* mlib-tgt-specific-vxworks.adb (Get_Target_Suffix): Replace xscale by

16
gcc/ada/gnat_ugn.texi
View file

@ -5339,6 +5339,22 @@ an explicit @option{-gnatws} or
implicit @option{-gnatwe} that is activated by the
use of @option{-gnatg}.
@item -gnatw.n
@emph{Activate warnings on atomic synchronization.}
@cindex @option{-gnatw.n} (@command{gcc})
@cindex Atomic Synchronization, warnings
This switch actives warnings when an access to an atomic variable
requires the generation of atomic synchronization code. These
warnings are off by default and this warning is not included
in @code{-gnatwa}.
@item -gnatw.N
@emph{Suppress warnings on atomic synchronization.}
@cindex @option{-gnatw.n} (@command{gcc})
@cindex Atomic Synchronization, warnings
This switch suppresses warnings when an access to an atomic variable
requires the generation of atomic synchronization code.
@item -gnatwo
@emph{Activate warnings on address clause overlays.}
@cindex @option{-gnatwo} (@command{gcc})

32
gcc/ada/sem_prag.adb
View file

@ -2823,6 +2823,8 @@ package body Sem_Prag is
-- Check if a rep item of the same name as the current pragma is already
-- chained as a rep pragma to the given entity. If so give a message
-- about the duplicate, and then raise Pragma_Exit so does not return.
-- Note that if E is a type, then this routine avoids flagging a pragma
-- which applies to a parent type from which E is derived.
procedure Check_Duplicated_Export_Name (Nam : Node_Id);
-- Nam is an N_String_Literal node containing the external name set by
@ -3924,6 +3926,36 @@ package body Sem_Prag is
P := Get_Rep_Item (E, Pragma_Name (N), Check_Parents => False);
if Present (P) then
-- If the entity is a type, then we have to make sure that the
-- ostensible duplicate is not for a parent type from which this
-- type is derived.
if Is_Type (E) then
if Nkind (P) = N_Pragma then
declare
Args : constant List_Id :=
Pragma_Argument_Associations (P);
begin
if Present (Args)
and then Is_Entity_Name (Expression (First (Args)))
and then Is_Type (Entity (Expression (First (Args))))
and then Entity (Expression (First (Args))) /= E
then
return;
end if;
end;
elsif Nkind (P) = N_Aspect_Specification
and then Is_Type (Entity (P))
and then Entity (P) /= E
then
return;
end if;
end if;
-- Here we have a definite duplicate
Error_Msg_Name_1 := Pragma_Name (N);
Error_Msg_Sloc := Sloc (P);

28
gcc/ada/sem_warn.adb
View file

@ -2130,11 +2130,18 @@ package body Sem_Warn is
Nam := First (Names (N));
while Present (Nam) loop
if Entity (Nam) = Pack then
Error_Msg_Qual_Level := 1;
Error_Msg_NE -- CODEFIX
("?u?no entities of package& are referenced!",
Nam, Pack);
Error_Msg_Qual_Level := 0;
-- Suppress message if any serious errors detected
-- that turn off expansion, and thus result in false
-- positives for this warning.
if Serious_Errors_Detected = 0 then
Error_Msg_Qual_Level := 1;
Error_Msg_NE -- CODEFIX
("?u?no entities of package& are referenced!",
Nam, Pack);
Error_Msg_Qual_Level := 0;
end if;
end if;
Next (Nam);
@ -2402,8 +2409,13 @@ package body Sem_Warn is
-- Else give the warning
else
if not
Has_Unreferenced (Entity (Name (Item)))
-- Warn if we unreferenced flag set and we have
-- not had serious errors. The reason we inhibit
-- the message if there are errors is to prevent
-- false positives from disabling expansion.
if not Has_Unreferenced (Entity (Name (Item)))
and then Serious_Errors_Detected = 0
then
Error_Msg_N -- CODEFIX
("?u?no entities of & are referenced!",
@ -2541,6 +2553,8 @@ package body Sem_Warn is
-- Start of processing for Check_Unused_Withs
begin
-- Immediate return if no semantics or warning flag not set
if not Opt.Check_Withs or else Operating_Mode = Check_Syntax then
return;
end if;

19
gcc/ada/ug_words
View file

@ -160,17 +160,25 @@ gcc -c ^ GNAT COMPILE
-gnatw.H ^ /WARNINGS=NOAVOIDGAPS
-gnatwi ^ /WARNINGS=IMPLEMENTATION
-gnatwI ^ /WARNINGS=NOIMPLEMENTATION
-gnatw.i ^ /WARNINGS=OVERLAPPING_ACTUALS
-gnatw.I ^ /WARNINGS=NOOVERLAPPING_ACTUALS
-gnatwj ^ /WARNINGS=OBSOLESCENT
-gnatwJ ^ /WARNINGS=NOOBSOLESCENT
-gnatwk ^ /WARNINGS=CONSTANT_VARIABLES
-gnatwK ^ /WARNINGS=NOCONSTANT_VARIABLES
-gnatw.k ^ /WARNINGS=STANDARD_REDEFINITION
-gnatw.K ^ /WARNINGS=NOSTANDARD_REDEFINITION
-gnatwl ^ /WARNINGS=ELABORATION
-gnatwL ^ /WARNINGS=NOELABORATION
-gnatwl ^ /WARNINGS=INHERITED_ASPECTS
-gnatwL ^ /WARNINGS=NOINHERITED_ASPECTS
-gnatwm ^ /WARNINGS=MODIFIED_UNREF
-gnatwM ^ /WARNINGS=NOMODIFIED_UNREF
-gnatw.m ^ /WARNINGS=SUSPICIOUS_MODULUES
-gnatw.M ^ /WARNINGS=NOSUSPICIOUS_MODULUES
-gnatwn ^ /WARNINGS=NORMAL
-gnatw.n ^ /WARNINGS=ATOMIC_SYNCHRONIZATION
-gnatw.N ^ /WARNINGS=NOATOMIC_SYNCHRONIZATION
-gnatwo ^ /WARNINGS=OVERLAYS
-gnatwO ^ /WARNINGS=NOOVERLAYS
-gnatw.o ^ /WARNINGS=OUT_PARAM_UNREF
@ -188,14 +196,20 @@ gcc -c ^ GNAT COMPILE
-gnatwr ^ /WARNINGS=REDUNDANT
-gnatwR ^ /WARNINGS=NOREDUNDANT
-gnatws ^ /WARNINGS=SUPPRESS
-gnatw.s ^ /WARNINGS=OVERRIDING_SIZE
-gnatw.S ^ /WARNINGS=NOOVERRIDING_SIZE
-gnatwt ^ /WARNINGS=DELETED_CODE
-gnatwT ^ /WARNINGS=NODELETED_CODE
-gnatw.t ^ /WARNINGS=SUSPICIOUS_CONTRACT
-gnatw.T ^ /WARNINGS=NOSUSPICIOUS_CONTRACT
-gnatwu ^ /WARNINGS=UNUSED
-gnatwU ^ /WARNINGS=NOUNUSED
-gnatw.u ^ /WARNINGS=UNORDERED_ENUMERATIONS
-gnatw.U ^ /WARNINGS=NOUNORDERED_ENUMERATIONS
-gnatwv ^ /WARNINGS=VARIABLES_UNINITIALIZED
-gnatwV ^ /WARNINGS=NOVARIABLES_UNINITIALIZED
-gnatw.v ^ /WARNINGS=REVERSE_BIT_ORDER
-gnatw.V ^ /WARNINGS=NOREVERSE_BIT_ORDER
-gnatww ^ /WARNINGS=LOWBOUND_ASSUMED
-gnatwW ^ /WARNINGS=NOLOWBOUND_ASSUMED
-gnatw.w ^ /WARNINGS=WARNINGS_OFF_PRAGMAS
@ -204,8 +218,8 @@ gcc -c ^ GNAT COMPILE
-gnatwX ^ /WARNINGS=NOIMPORT_EXPORT_PRAGMAS
-gnatw.x ^ /WARNINGS=LOCAL_RAISE_HANDLING
-gnatw.X ^ /WARNINGS=NOLOCAL_RAISE_HANDLING
-gnatwy ^ /WARNINGS=ADA_2005_COMPATIBILITY
-gnatwY ^ /WARNINGS=NOADA_2005_COMPATIBILITY
-gnatwy ^ /WARNINGS=ADA_COMPATIBILITY
-gnatwY ^ /WARNINGS=NOADA_COMPATIBILITY
-gnatw.y ^ /WARNINGS=WHY_SPEC_NEEDS_BODY
-gnatw.Y ^ /WARNINGS=NOWHY_SPEC_NEEDS_BODY
-gnatwz ^ /WARNINGS=UNCHECKED_CONVERSIONS
@ -250,3 +264,4 @@ stderr ^ SYS$ERROR
-H32 ^ /32_MALLOC
-H64 ^ /64_MALLOC
-Wall ^ /WARNINGS=ALL_GCC
-Wuninitialized ^ /WARNINGS=UNINITIALIZED

530
gcc/ada/vms_data.ads
View file

@ -3132,6 +3132,10 @@ package VMS_Data is
"-gnatwi " &
"NOIMPLEMENTATION " &
"-gnatwI " &
"OVERLAPPING_ACTUALS " &
"-gnatw.i " &
"NOOVERLAPPING_ACTUALS " &
"-gnatw.I " &
"OBSOLESCENT " &
"-gnatwj " &
"NOOBSOLESCENT " &
@ -3148,6 +3152,10 @@ package VMS_Data is
"-gnatwl " &
"NOELABORATION " &
"-gnatwL " &
"INHERITED_ASPECTS " &
"-gnatw.l " &
"NOINHERITED_ASPECTS " &
"-gnatw.L " &
"MODIFIED_UNREF " &
"-gnatwm " &
"NOMODIFIED_UNREF " &
@ -3158,6 +3166,10 @@ package VMS_Data is
"-gnatw.M " &
"NORMAL " &
"-gnatwn " &
"ATOMIC_SYNCHRONIZATION " &
"-gnatw.n " &
"NOATOMIC_SYNCHRONIZATION " &
"-gnatw.N " &
"OVERLAYS " &
"-gnatwo " &
"NOOVERLAYS " &
@ -3170,12 +3182,12 @@ package VMS_Data is
"-gnatwp " &
"NOINEFFECTIVE_INLINE " &
"-gnatwP " &
"MISSING_PARENS " &
"-gnatwq " &
"PARAMETER_ORDER " &
"-gnatw.p " &
"NOPARAMETER_ORDER " &
"-gnatw.P " &
"MISSING_PARENS " &
"-gnatwq " &
"NOMISSING_PARENS " &
"-gnatwQ " &
"REDUNDANT " &
@ -3196,6 +3208,10 @@ package VMS_Data is
"-gnatwt " &
"NODELETED_CODE " &
"-gnatwT " &
"SUSPICIOUS_CONTRACT " &
"-gnatw.t " &
"NOSUSPICIOUS_CONTRACT " &
"-gnatw.T " &
"UNINITIALIZED " &
"-Wuninitialized " &
"UNUSED " &
@ -3230,9 +3246,9 @@ package VMS_Data is
"-gnatw.x " &
"NOLOCAL_RAISE_HANDLING " &
"-gnatw.X " &
"ADA_2005_COMPATIBILITY " &
"ADA_COMPATIBILITY " &
"-gnatwy " &
"NOADA_2005_COMPATIBILITY " &
"NOADA_COMPATIBILITY " &
"-gnatwY " &
"WHY_SPEC_NEEDS_BODY " &
"-gnatw.y " &
@ -3256,272 +3272,382 @@ package VMS_Data is
-- error. Second, if the compiler detects a situation that is sure to
-- raise an exception at runtime, it generates a warning message.
--
-- You may specify the following keywords to change this behavior:
-- You may specify the following keywords to change this behavior.
--
-- DEFAULT (D) The default behavior above.
-- DEFAULT (D) The default behavior. This includes the
-- following categories of warnings:
--
-- ALL Activate all optional warnings.
-- Activates most optional warning messages,
-- see remaining list in this section for
-- details on optional warning messages that
-- can be individually controlled.
-- The warnings that are not turned on by
-- this option are BIASED_ROUNDING,
-- IMPLICIT_DEREFERENCE, HIDING and
-- ELABORATION. All other optional Ada
-- warnings are turned on.
-- ADA_COMPATIBILITY
-- ADDRESS_CLAUSE_OVERLAY
-- BIASED_REPRESENTATION
-- IMPORT_EXPORT_PRAGMAS
-- FAILING_ASSERTIONS
-- IMPLEMENTATION
-- LOWBOUND_ASSUMED
-- MISSING_PARENS
-- OVERLAPPING_ACTUALS
-- REVERSE_BIT_ORDER
-- SUSPICIOUS_CONTRACT
-- SUSPICIOUS_MODULUS
-- UNCHECKED_CONVERSIONS
-- UNRECOGNIZED_PRAGMA
-- VARIABLES_UNINITIALIZED
--
-- EVERY Activate every optional warning.
-- Activates all optional warnings, including
-- those listed above as exceptions for ALL.
-- as well as all warnings that cannot be
-- individually suppressed.
--
-- NOALL Suppress all optional errors.
-- Suppresses all optional warning messages
-- that can be activated by option ALL.
-- ALL Activate all optional warnings.
-- Activates the most commong used optional
-- warning messages. The warnings that are not
-- turned on by this are:
--
-- ALL_GCC Request additional messages from the GCC
-- backend. Most of these are not relevant
-- to Ada.
-- ADDRESS_CLAUSE_OVERLAY
-- ATOMIC_SYNCHRONIZATION
-- AVOID_GAPS
-- BAD_FIXED_VALUE
-- BIASED_ROUNDING
-- DELETED_CODE
-- ELABORATION
-- HIDING
-- IMPLICIT_DEREFERENCE
-- INHERITED_ASPECTS
-- OUT_PARAM_UNREF
-- OVERLAPPING_ACTUALS
-- OVERRIDING_SIZE
-- STANDARD_REDEFINITION
-- SUSPICIOUS_MODULUS
-- UNORDERED_ENUMERATION
-- WARNINGS_OFF_PRAGMAS
-- WHY_BODY_NEEDED
--
-- CONDITIONALS Activate warnings for conditional
-- Expressions used in tests that are known
-- to be True or False at compile time. The
-- default is that such warnings are not
-- generated.
-- All other optional warnings are turned on.
--
-- NOCONDITIONALS Suppress warnings for conditional
-- expressions used in tests that are known
-- to be True or False at compile time.
-- OPTIONAL Turn on standard optional warnings.
-- This has the same effect as ALL.
--
-- IMPLICIT_DEREFERENCE Activate warnings on implicit dereferencing.
-- The use of a prefix of an access type in an
-- indexed component, slice, or selected component
-- without an explicit .all will generate
-- a warning. With this warning enabled, access
-- checks occur only at points where an explicit
-- .all appears in the source code (assuming no
-- warnings are generated as a result of this
-- option). The default is that such warnings are
-- not generated. Note that /WARNINGS=ALL does not
-- affect the setting of this warning option.
-- NOALL Suppress all optional errors.
-- Suppresses all optional warning messages
-- including those not activated by ALL.
--
-- NOIMPLICIT_DEREFERENCE Suppress warnings on implicit dereferencing.
-- in indexed components, slices, and selected
-- components.
-- NOOPTIONAL Turn off standard optional warnings.
-- This has the same effect as NOALL
--
-- ELABORATION Activate warnings on missing pragma
-- Elaborate_All statements. The default is
-- that such warnings are not generated.
-- EVERY Activate every optional warning.
-- Activates all optional warnings, including
-- those listed above as exceptions for ALL.
--
-- NOELABORATION Suppress warnings on missing pragma
-- Elaborate_All statements.
-- ALL_GCC Request additional messages from the GCC
-- backend. Most of these are not Ada-relevant.
--
-- ERRORS Warning messages are to be treated as errors.
-- The warning string still appears, but the
-- warning messages are counted as errors, and
-- prevent the generation of an object file.
-- UNINITIALIZED Activate warnings for uninitialized
-- variables. This is a GCC option, not an Ada
-- option. You must also specify the /OPTIMIZE
-- qualifier with a value other than NONE (in
-- other words, this option is effective only
-- if optimization is turned on).
-- ERRORS Warning messages are to be treated as errors.
-- The warning string still appears, but the
-- warning messages are counted as errors, and
-- prevent the generation of an object file.
--
-- SUPPRESS Completely suppress the output of all warning
-- messages. Same as /NOWARNINGS.
--
-- NORMAL Sets normal warning mode, in which enabled
-- warnings are issued and treated as warnings
-- rather than errors. This is the default mode.
-- It can be used to cancel the effect of an
-- explicit /WARNINGS=SUPPRESS or
-- /WARNINGS=ERRORS. It also cancels the effect
-- of the implicit /WARNINGS=ERRORS that is
-- activated by the use of /STYLE=GNAT.
--
-- TAG_WARNINGS Causes the string [xxx] to be added to
-- warnings that are controlled by the warning
-- switch -gnat??. See below for list of these
-- equivalent switch names.
--
-- NOTAG_WARNINGS Turns off warning tag output (default setting).
--
-- The remaining entries control individual warning categories. If one
-- of these options is preceded by NO (e.g. NOAVOID_GAPS), then the
-- corresponding class of warnings is suppressed. The -gnatwxx tag
-- below the name indicates the non-VMS warning switch option. This is
-- used in the warning tags generated by TAG_WARNINGS (above)
--
-- ADA_COMPATIBILITY Activate warnings for Ada compatibility issues.
-- (-gnatwy) This generates warnings for usages which are
-- legal, but may cause difficulties with later
-- Ada versions (e.g. the use of INTERFACE as an
-- identifier, which is legal in Ada 85, but in
-- Ada 2005, this is a reserved word).
--
-- ATOMIC_SYNCHRONIZATION Activate info msgs for atomic synchronization.
-- (-gnatw.n) This generates information messages when an
-- access to an atomic variable requires the
-- generation of atomic synchronization code.
--
-- AVOID_GAPS Activate warnings for gaps in records.
-- (-gnatw.h) This outputs a warning if a representation
-- clause for a record leaves unallocated bits.
--
-- BAD_FIXED_VALUES Activate warnings on bad fixed values.
-- (-gnatwb) When this is enabled, a fixed-type literal
-- will generate a warning if its value does not
-- correspond to an exact value of the type and
-- is thus subject to rounding.
--
-- BIASED_REPRESENTATION Activate warnings for biased representations.
-- (-gnatw.b) A warning will be generated if a size clause
-- or a component clause forces use of a biased
-- representation (e.g. range 1..5 with size 2).
--
-- CONDITIONALS Activate warnings for conditional expressions
-- (-gnatwc) in tests where the expression is known to
-- be True or False at compile time.
--
-- DELETED_CODE Activate warning for conditional deleted code.
-- (-gnatwt) This option generates warnings for tracking of
-- code in conditionals (IF and CASE statements)
-- that is detected to be dead code which cannot
-- be executed, and which is removed by the
-- front end. This may be useful for detecting
-- deactivated code in certified applications.
--
-- CONSTANT_VARIABLES Activate warnings on constant variables.
-- (-gnatwk) A warning is output for a variable which could
-- have been declared as a constant.
--
-- ELABORATION Activate warnings on missing pragma Elaborate
-- (-gnatwl) and Elaborate_All statements.
--
-- FAILING_ASSERTIONS Activate warnings on failing assertions.
-- (-gnatw.a) Generates a warning for assertions that are
-- sure to fail.
--
-- HIDING Activate warnings on hiding declarations.
-- A declaration is considered hiding if it is
-- for a non-overloadable entity, and it declares
-- (-gnatwh) A declaration is considered hiding if it is
-- for a non-overloadable entity, and declares
-- an entity with the same name as some other
-- entity that is directly or use-visible. The
-- default is that such warnings are not
-- generated.
-- entity that is directly or use-visible.
--
-- NOHIDING Suppress warnings on hiding declarations.
-- IMPORT_EXPORT_PRAGMAS Activate warnings on import-export pragmas.
-- (-gnatwx) This generates a warning on an Export or Import
-- pragma when the compiler detects a possible
-- conflict between the Ada and foreign language
-- calling sequences. For example, the use of
-- default parameters in a convention C procedure
-- is dubious because the C compiler cannot supply
-- the proper default, so a warning is issued.
--
-- IMPLEMENTATION Activate warnings for a with of an internal
-- GNAT implementation unit, defined as any unit
-- from the Ada, Interfaces, GNAT, DEC or
-- System hierarchies that is not documented in
-- either the Ada Reference Manual or the GNAT
-- Programmer's Reference Manual. Such units are
-- intended only for internal implementation
-- purposes and should not be with'ed by user
-- programs. The default is that such warnings
-- are generated.
-- (-gnatwi) GNAT implementation unit, defined as any unit
-- from the Ada, Interfaces, GNAT, DEC or System
-- hierarchies that is not documented in the
-- Ada Reference Manual or the GNAT Programmer's
-- Reference Manual. Such units are intended only
-- for internal implementation purposes and may
-- change from version to veresion, and should
-- not be with'ed by user programs.
--
-- NOIMPLEMENTATION Disables warnings for a with of an internal
-- GNAT implementation unit.
-- IMPLICIT_DEREFERENCE Activate warnings on implicit dereferencing.
-- (-gnatwd) The use of a prefix of an access type in an
-- indexed component, slice, or selected component
-- without an explicit .all will generate a
-- warning. When this warning is enabled, and no
-- warnings of this type are generated, access
-- checks occur only at points where the source
-- program contains an explicit use of .all.
--
-- INEFFECTIVE_INLINE Activate warnings on ineffective pragma Inlines
-- Activates warnings for failure of front end
-- inlining (activated by /INLINE=FULL) to inline
-- a particular call. There are many reasons for
-- not being able to inline a call, including most
-- INEFFECTIVE_INLINE Activate warnings on ineffective Inlines.
-- (-gnatwp) Activates warnings for failure of front end
-- inlining (activated by /INLINE=FULL) to
-- inline a particular call when a pragma Inline
-- applies. There are many reasons for not
-- being able to inline a call, including most
-- commonly that the call is too complex to
-- inline. This warning can also be turned on
-- using /INLINE=FULL.
--
-- NOINEFFECTIVE_INLINE Suppress warnings on ineffective pragma Inlines
-- Suppresses warnings on ineffective pragma
-- Inlines. If the inlining mechanism cannot
-- inline a call, it will simply ignore the
-- request silently.
-- INHERITED_ASPECTS Activate info messages for inherited aspects.
-- (-gantw.l) Outputs information messages for tagged types
-- that inherit aspects from a parent.
--
-- LOCAL_RAISE_HANDLING Activate warnings for No_Exception_Propagation.
-- (-gnatw.x) This generates warnings for exception usage
-- when the No_Exception_Propagation restriction
-- is in effect. Warnings are given for implicit
-- or explicit exception raises which are not
-- covered by a local handler, and for exception
-- handlers which do not cover a local raise.
--
-- LOWBOUND_ASSUMED Activate warnings for low bound assumptions.
-- (-gnatww) Outputs warnings if code appears to depend on
-- an assumption about the lower bound of one of
-- the subprogram parameters (for example using
-- S(1 .. 5) instead of S(S'First .. S'First + 4).
--
-- MISSING_COMPONENT_CLAUSES
-- Activate warnings for cases when there are
-- component clauses for a record type, but not
-- for every component of the record.
-- (-gnatw.c) Activate warnings for unrepped component.
-- Generates a warning for a record component
-- which does not have a component clause if
-- at least one component claused is present
-- for some other component of the record.
--
-- NOMISSING_COMPONENT_CLAUSES
-- Suppress warnings for cases when there are
-- missing component clauses for a record type.
--
-- MISSING_PARENS
-- Activate warnings for cases where parentheses
-- MISSING_PARENS Activate warnings for missing parentheses.
-- (-gnatwq) Outputs a warning for cases where parentheses
-- are not used and the result is potential
-- ambiguity from a reader's point of view.
-- For example (not a > b) when a and b are
-- modular means (not (a) > b) and very likely
-- the programmer intended (not (a > b)).
--
-- NOMISSING_PARENS
-- Suppress warnings for cases where parentheses
-- are not used and the result is potential
-- ambiguity from a reader's point of view.
--
-- MODIFIED_UNREF Activates warnings for variables that are
-- assigned (using an initialization value or with
-- one or more assignment statements) but whose
-- value is never read. The warning is suppressed
-- for volatile variables and also for variables
-- MODIFIED_UNREF Activate warning for assigned but not read.
-- (-gnatwm) Outputs a warning for variables that are
-- assigned (using an initialization value or an
-- assignment statements) but whose value is
-- never read. The warning is suppressed for
-- volatile variables and also for variables
-- that are renamings of other variables or for
-- which an address clause is given. This warning
-- can also be turned on using /WARNINGS/OPTIONAL.
--
-- NOMODIFIED_UNREF Disables warnings for variables that are
-- assigned or initialized, but never read.
--
-- NORMAL Sets normal warning mode, in which enabled
-- warnings are issued and treated as warnings
-- rather than errors. This is the default mode.
-- It can be used to cancel the effect of an
-- explicit /WARNINGS=SUPPRESS or
-- /WARNINGS=ERRORS. It also cancels the effect
-- of the implicit /WARNINGS=ERRORS that is
-- activated by the use of /STYLE=GNAT.
--
-- OBSOLESCENT Activates warnings for calls to subprograms
-- marked with pragma Obsolescent and for use of
-- features in Annex J of the Ada Reference
-- Manual. In the case of Annex J, not all
-- features are flagged. In particular use of the
-- renamed packages (like Text_IO), use of package
-- ASCII and use of the attribute 'Constrained are
-- not flagged, since these are very common and
-- would generate many annoying positive warnings.
-- The default is that such warnings are not
-- generated.
--
-- NOOBSOLESCENT Disables warnings on use of obsolescent
-- features.
-- which an address clause is given.
--
-- OBJECT_RENAME Activate warnings for non limited objects
-- renaming parameterless functions.
-- (-gnatw.r) renaming parameterless functions.
--
-- NOOBJECT_RENAME Suppress warnings for non limited objects
-- renaming parameterless functions.
-- OBSOLESCENT Activates warnings for calls to subprograms
-- (-gnatwj) marked with pragma Obsolescent and for use of
-- features in Annex J of the Ada Reference
-- Manual. In the case of Annex J, not all
-- features are flagged. In particular use of
-- the renamed packages (like Text_IO), use of
-- package ASCII, and use of the attribute
-- 'Constrained are not flagged, since these are
-- common and would generate many annoying
-- false-positive warnings.
--
-- OPTIONAL Equivalent to ALL.
-- OUT_PARAM_UNREF Activate warnings on unreferenced OUT params.
-- (-gantw.o) This switch activates warnings for variables
-- that are modified by using them as actuals for
-- a call to a procedure with an out mode formal,
-- where the resulting assigned value is never
-- read. It is applicable in the case where there
-- is more than one out mode formal. If there is
-- only one out mode formal, the warning is issued
-- by default (controlled by UNUSED). The warning
-- is suppressed for volatile variables and also
-- for variables that are renamings of other
-- variables or for which an address clause
-- is given.
--
-- NOOPTIONAL Equivalent to NOALL.
-- OVERLAPPING_ACTUALS Activate warnings on overlapping actuals.
-- (-gnatw.i) Enables a warning on statically detectable
-- overlapping actuals in a subprogram call,
-- when one of the actuals is an in-out
-- parameter, and the types of the actuals
-- are not by-copy types.
--
-- OVERLAYS Activate warnings for possibly unintended
-- initialization effects of defining address
-- clauses that cause one variable to overlap
-- another. The default is that such warnings
-- are generated.
--
-- NOOVERLAYS Suppress warnings on possibly unintended
-- initialization effects of defining address
-- (-gnatwo) initialization effects of defining address
-- clauses that cause one variable to overlap
-- another.
--
-- OVERRIDING_SIZE Activate warning on overridden size clause.
-- (-gnatw.s) Generates a warning if an explicit size clause
-- is overridden by a component clause in a record
-- or a component size in an array.
--
-- PARAMETER_ORDER Activate warnings for suspicious parameter
-- (-gnatw.p) ordering. A warning is generated if positional
-- ordering is used and the actuals match the
-- formal names, but are in the wrong order (e.g.
-- GEN (B, A), when the formals of GEN are A, B.)
-- No warning is generated for named parameters,
-- so GEN (A => B, B => A) would be allowed.
--
-- REDUNDANT Activate warnings for redundant constructs.
-- In particular assignments of a variable to
-- (-gnatwr) In particular assignments of a variable to
-- itself, and a type conversion that converts
-- an object to its own type. The default
-- is that such warnings are not generated.
-- an object to its own type.
--
-- NOREDUNDANT Suppress warnings for redundant constructs.
-- REVERSE_BIT_ORDER Activates info messages for reverse bit order.
-- (-gnatw.v) Generates information messages that show the
-- effect of specifying reverse bit order for
-- a record on individual components.
--
-- SUPPRESS Completely suppress the output of all warning
-- messages. Same as /NOWARNINGS.
-- STANDARD_REDEFINITION Activate warnings on standard redefinition.
-- (-gnatw.k) Generates a warning message if a declaration
-- declares an identifier that matches one that
-- is declared in package Standard (e.g. Float).
--
-- SUSPICIOUS_CONTRACT Activate warnings on suspicious postconditions.
-- (-gnatw.t) This generates warnings if a postcondition for
-- a function does not mention the result, or if
-- a postcondition for a procedure depends only on
-- the entry values of the parameters.
--
-- SUSPICIOUS_MODULUS Warn on suspicious modulus values, for
-- (-gnatw.m) example "mod 7" is suspicious for a size with
-- 7 bits, since it was likely intended to be
-- "mod 2**7". Similarly "mod 32" is considered
-- suspicious, since it was likely intended to
-- be "mod 2**32".
--
-- UNCHECKED_CONVERSIONS Activates warnings on unchecked conversions.
-- Causes warnings to be generated for
-- unchecked conversions when the two types are
-- known at compile time to have different sizes.
-- The default is that such warnings are
-- generated.
-- (-gnatwz) Causes warnings to be generated for unchecked
-- conversions between types that are known at
-- compile time to have different sizes.
--
-- NOUNCHECKED_CONVERSIONS Suppress warnings for unchecked conversions.
-- UNORDERED_ENUMERATION Activate warnings for unordered enumeration.
-- (-gnatw.u) Causes warnings to be generated if for an
-- enumeration type that does not have a pragma
-- Ordered that applies, if a subtype with a
-- range is used, or a comparison other than
-- [in]equality appears for values of the type.
--
-- UNINITIALIZED Generate warnings for uninitialized variables.
-- This is a GCC option, not an Ada option.
-- You must also specify the /OPTIMIZE qualifier
-- with a value other than NONE (in other words,
-- this keyword works only if optimization is
-- turned on).
-- UNRECOGNIZED_PRAGMAS Activate warnings for unrecognized pragmas.
-- (-gnatwg) Such pragmas are ignored other than generating
-- these warnings.
--
-- UNREFERENCED_FORMALS Activate warnings on unreferenced formals.
-- Causes a warning to be generated if a formal
-- (-gnatwf) Causes a warning to be generated if a formal
-- parameter is not referenced in the body of
-- the subprogram. This warning can also be turned
-- on using option ALL or UNUSED.
--
-- NOUNREFERENCED_FORMALS Suppress warnings on unreferenced formals.
-- Suppresses warnings for unreferenced formal
-- parameters. Note that the combination UNUSED
-- followed by NOUNREFERENCED_FORMALS has the
-- effect of warning on unreferenced entities
-- other than subprogram formals.
-- the subprogram. Note that the combination
-- UNUSED followed by NOUNREFERENCED_FORMALS
-- has the effect of warning on unreferenced
-- entities other than subprogram formals.
--
-- UNUSED Activates warnings to be generated for entities
-- that are defined but not referenced, and for
-- (-gantwu) that are defined but not referenced, and for
-- units that are with'ed and not referenced. In
-- the case of packages, a warning is also
-- generated if no entities in the package are
-- referenced. This means that if the package
-- is referenced but the only references are in
-- use clauses or renames declarations, a warning
-- is still generated. A warning is also generated
-- for a generic package that is with'ed but never
-- instantiated. In the case where a package or
-- subprogram body is compiled, and there is a
-- with on the corresponding spec that is only
-- referenced in the body, a warning is also
-- generated, noting that the with can be moved
-- to the body. The default is that such warnings
-- are not generated.
--
-- NOUNUSED Suppress warnings for unused entities and
-- packages.
-- in use clauses or renames declarations, a
-- warning is still generated. A warning is also
-- generated for a generic package that is
-- with'ed but never instantiated. In the case
-- where a package or subprogram body is
-- compiled, and there is a with on the
-- corresponding spec that is only referenced
-- in the body, a warning is also generated,
-- noting the with can be moved to the body.
--
-- VARIABLES_UNINITIALIZED Activates warnings on unassigned variables.
-- Causes warnings to be generated when a variable
-- is accessed which may not be properly
-- uninitialized. The default is that such
-- warnings are generated.
-- (-gnatwv) Causes warnings to be generated when a
-- variable is accessed which may not be
-- properly initialized.
--
-- NOVARIABLES_UNINITIALIZED
-- Suppress warnings for uninitialized variables.
--
-- TAG_WARNINGS Causes the string [xxx] to be added to warnings
-- that are controlled by the warning string xxx,
-- e.g. [REDUNDANT], or if the warning is enabled
-- by default, the tag is [enabled by default].
--
-- NOTAG_WARNINGS Turns off warning tag output (default setting).
-- WARNINGS_OFF_PRAGMAS Activates warnings for pragma Warnings (Off).
-- (-gnatw.w) This generates a warning if the specific string
-- version the pragma is used as a local pragma
-- (i.e. not a configuration pragma) and no
-- warning is suppressed as a result.
--
-- WHY_SPEC_NEEDS_BODY Generates information messages showing why a
-- package specification requires a body.
-- (-gnatw.y) package specification requires a body.
--
-- NO_WHY_SPEC_NEEDS_BODY Turns off information messages showing why a
-- package specification requires a body.
S_GCC_WarnX : aliased constant S := "/NOWARNINGS " &
"-gnatws";
-- NODOC (see /WARNINGS)