Make UNUSED/UNDRIVEN -Wall only

bin/verilator

@@ -2573,7 +2573,7 @@ cases would result in simulator mismatches.
 
 Warns that the specified signal is never sourced.
 
-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 UNOPT
@@ -2659,7 +2659,7 @@ correctly.
 Warns that the specified signal is never sinked.  This is a future message,
 currently Verilator will not produce this warning.
 
-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 VARHIDDEN

src/V3Error.h

@@ -132,13 +132,14 @@ public:
 				      || m_e==CMPCONST
 				      || m_e==IMPLICIT
 				      || m_e==LITENDIAN
-				      || m_e==UNDRIVEN || m_e==UNSIGNED
-				      || m_e==UNUSED
+				      || m_e==UNSIGNED
 				      || m_e==WIDTH); }
     // Warnings that are style only
     bool styleError() const { return ( m_e==DEFPARAM
 				       || m_e==DECLFILENAME
 				       || m_e==INCABSPATH
+				       || m_e==UNDRIVEN
+				       || m_e==UNUSED
 				       || m_e==VARHIDDEN ); }
   };
   inline bool operator== (V3ErrorCode lhs, V3ErrorCode rhs) { return (lhs.m_e == rhs.m_e); }

test_regress/t/t_lint_implicit_bad.pl

@@ -10,7 +10,7 @@ if (!$::Driver) { use FindBin; exec("$FindBin::Bin/bootstrap.pl", @ARGV, $0); di
 top_filename("t/t_lint_implicit.v");
 
 compile (
-	 v_flags2 => ["--lint-only"],
+	 v_flags2 => ["--lint-only -Wall -Wno-DECLFILENAME"],
 	 fails=>1,
 	 expect=>
 '%Warning-IMPLICIT: t/t_lint_implicit.v:\d+: Signal definition not found, creating implicitly: b

test_regress/t/t_lint_implicit_def_bad.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 -Wno-DECLFILENAME"],
 	 fails=>1,
 	 expect=>
 '%Warning-IMPLICIT: t/t_lint_implicit_def_bad.v:\d+: Signal definition not found, creating implicitly: imp_warn