Add -Wall; move VARHIDDEN to style warnings

Changes

@@ -7,8 +7,8 @@ indicates the contributor was also the author of the fix; Thanks!
 
 **   Add limited support for VPI access to public signals, see docs.
 
-**   Add -Wwarn-style, -Wno-style to enable code style warnings that are
-     added to this release and disabled by default.
+**   Add -Wall, -Wwarn-style, -Wno-style to enable code style warnings
+     that have been added to this release, and disabled by default.
 
 ***  Add -F option to read relative option files, bug297. [Neil Hamilton]
 
@@ -16,10 +16,12 @@ indicates the contributor was also the author of the fix; Thanks!
 
 ***  Suppress WIDTH warnings when adding/subtracting 1'b1.
 
-***  Add optional DEFPARAM warning to find deprecated defparam statements.
+***  With --Wall, add DEFPARAM warning to find deprecated defparam statements.
 
 **** When running with VERILATOR_ROOT, optionally find binaries under bin.
 
+**** The VARHIDDEN warning is now disabled by default, use -Wall to enable.
+
 * Verilator 3.805 2010/11/02
 
 **** Add warning when directory contains spaces, msg378.  [Salman Sheikh]

bin/verilator

@@ -609,8 +609,8 @@ fairly standard across Verilog tools.
 
 Check the files for lint violations only, do not create any other output.
 
-You may also want the -Wwarn-style option to enable messages that are
-considered stylistic and not enabled by default.
+You may also want the -Wall option to enable messages that are considered
+stylistic and not enabled by default.
 
 If the design is not to be completely Verilated see also the --bbox-sys and
 --bbox-unsup options.
@@ -839,6 +839,11 @@ Read the filename as a Verilog library.  Any modules in the file may be
 used to resolve cell instantiations in the top level module, else ignored.
 Note -v is fairly standard across Verilog tools.
 
+=item -Wall
+
+Enable all warnings, including code style warnings that are normally
+disabled by default.
+
 =item -Werror-I<message>
 
 Convert the specified warning message into a error message.  This is
@@ -862,7 +867,7 @@ Disable the specified warning message.
 Disable all lint related warning messages, and all style warnings.  This is
 equivalent to "-Wno-CASEINCOMPLETE -Wno-CASEOVERLAP -Wno-CASEX
 -Wno-CASEWITHX -Wno-CMPCONST -Wno-IMPLICIT -Wno-LITENDIAN -Wno-UNDRIVEN
--Wno-UNSIGNED -Wno-UNUSED -Wno-VARHIDDEN -Wno-WIDTH" plus the list shown
+-Wno-UNSIGNED -Wno-UNUSED -Wno-WIDTH" plus the list shown
 for Wno-style.
 
 It is strongly recommended you cleanup your code rather than using this
@@ -871,8 +876,8 @@ received from third parties.
 
 =item -Wno-style
 
-Disable all code style related warning messages (note by default they are already disabled).  This is equivalent to
-"-Wno-DEFPARAM".
+Disable all code style related warning messages (note by default they are
+already disabled).  This is equivalent to "-Wno-DEFPARAM -Wno-VARHIDDEN".
 
 =item -Wwarn-I<message>
 
@@ -884,12 +889,12 @@ Enable all lint related warning messages (note by default they are already
 enabled), but do not affect style messages.  This is equivalent to
 "-Wwarn-CASEINCOMPLETE -Wwarn-CASEOVERLAP -Wwarn-CASEX -Wwarn-CASEWITHX
 -Wwarn-CMPCONST -Wwarn-IMPLICIT -Wwarn-LITENDIAN -Wwarn-UNDRIVEN
--Wwarn-UNSIGNED -Wwarn-UNUSED -Wwarn-VARHIDDEN -Wwarn-WIDTH".
+-Wwarn-UNSIGNED -Wwarn-UNUSED -Wwarn-WIDTH".
 
 =item -Wwarn-style
 
 Enable all code style related warning messages.  This is equivalent to
-"-WDEFPARAM".
+"-Wwarn-DEFPARAM -Wwarn-VARHIDDEN".
 
 =item -x-assign 0
 
@@ -951,7 +956,7 @@ We'll compile this example into C++.
 Now we run Verilator on our little example.
 
     export VERILATOR_ROOT=/path/to/where/verilator/was/installed
-    $VERILATOR_ROOT/bin/verilator --cc our.v --exe sim_main.cpp
+    $VERILATOR_ROOT/bin/verilator -Wall --cc our.v --exe sim_main.cpp
 
 We can see the source code under the "obj_dir" directory.  See the FILES
 section below for descriptions of some of the files that were created.
@@ -1013,7 +1018,7 @@ This is an example similar to the above, but using SystemPerl.
 Now we run Verilator on our little example.
 
     export VERILATOR_ROOT=/path/to/where/verilator/was/installed
-    $VERILATOR_ROOT/bin/verilator --sp our.v
+    $VERILATOR_ROOT/bin/verilator -Wall --sp our.v
 
 Then we convert the SystemPerl output to SystemC.
 
@@ -2626,7 +2631,7 @@ the same name as a variable in the upper level module or begin/end block
 (thus hiding the upper variable from being able to be used.)  Rename the
 variable to avoid confusion when reading the code.
 
-Ignoring this warning will only suppress the lint check, it will simulate
+Disabled by default as this is a code style warning, it will simulate
 correctly.
 
 =item WIDTH

src/V3Error.h

@@ -128,10 +128,11 @@ public:
 				      || m_e==IMPLICIT
 				      || m_e==LITENDIAN
 				      || m_e==UNDRIVEN || m_e==UNSIGNED
-				      || m_e==UNUSED || m_e==VARHIDDEN
+				      || m_e==UNUSED
 				      || m_e==WIDTH); }
     // Warnings that are style only
-    bool styleError() const { return ( m_e==DEFPARAM); }
+    bool styleError() const { return ( m_e==DEFPARAM
+				       || m_e==VARHIDDEN ); }
   };
   inline bool operator== (V3ErrorCode lhs, V3ErrorCode rhs) { return (lhs.m_e == rhs.m_e); }
   inline bool operator== (V3ErrorCode lhs, V3ErrorCode::en rhs) { return (lhs.m_e == rhs); }

src/V3Options.cpp

@@ -772,6 +772,10 @@ void V3Options::parseOptsList(FileLine* fl, const string& optdir, int argc, char
 		showVersion(false);
 		exit(0);
 	    }
+	    else if ( !strcmp (sw, "-Wall") )	{
+		FileLine::globalWarnLintOff(false);
+		FileLine::globalWarnStyleOff(false);
+	    }
 	    else if ( !strncmp (sw, "-Werror-",strlen("-Werror-")) )	{
 		string msg = sw+strlen("-Werror-");
 		V3ErrorCode code (msg.c_str());

test_regress/t/t_var_bad_hide.pl

@@ -8,7 +8,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Version 2.0.
 
 compile (
-	 v_flags2 => ["--lint-only"],
+	 v_flags2 => ["--lint-only -Wall"],
 	 fails=>$Self->{v3},
 	 expect=>
 '%Warning-VARHIDDEN: t/t_var_bad_hide.v:\d+: Declaration of signal hides declaration in upper scope: top

test_regress/t/t_var_bad_hide2.pl

@@ -8,7 +8,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 # Version 2.0.
 
 compile (
-	 v_flags2 => ["--lint-only"],
+	 v_flags2 => ["--lint-only -Wall"],
 	 fails=>$Self->{v3},
 	 expect=>
 '%Warning-VARHIDDEN: t/t_var_bad_hide2.v:\d+: Declaration of signal hides declaration in upper scope: t