Add lint_off -match waivers (#2102)

* Add more directives to configuration files

Allow to set the same directives in configuration files that can also
be set by comment attributes (such as /* verilator public */ etc).

* Add support for lint messsage waivers

Add configuration file switch '-match' for lint_off. It takes a string
with wildcards allowed and warnings will be matched against it (if
rule and file also match). If it matches, the warning is waived.

Fixes #1649 and #1514 
Closes #2072

src/V3LinkParse.cpp

@@ -28,6 +28,7 @@
 #include "V3Global.h"
 #include "V3LinkParse.h"
 #include "V3Ast.h"
+#include "V3Config.h"
 
 #include <algorithm>
 #include <cstdarg>
@@ -106,6 +107,8 @@ private:
 
     // VISITs
     virtual void visit(AstNodeFTask* nodep) {
+        V3Config::applyFTask(m_modp, nodep);
+
         if (!nodep->user1SetOnce()) {  // Process only once.
             cleanFileline(nodep);
             m_ftaskp = nodep;
@@ -189,6 +192,9 @@ private:
             return;
         }
 
+        // Maybe this variable has a signal attribute
+        V3Config::applyVarAttr(m_modp, m_ftaskp, nodep);
+
         if (v3Global.opt.publicFlatRW()) {
             switch (nodep->varType()) {
             case AstVarType::VAR:
@@ -438,6 +444,8 @@ private:
     }
 
     virtual void visit(AstNodeModule* nodep) {
+        V3Config::applyModule(nodep);
+
         // Module: Create sim table for entire module and iterate
         cleanFileline(nodep);
         //
@@ -474,6 +482,17 @@ private:
         visitIterateNoValueMod(nodep);
     }
 
+    virtual void visit(AstBegin* nodep) {
+        V3Config::applyCoverageBlock(m_modp, nodep);
+        cleanFileline(nodep);
+        iterateChildren(nodep);
+    }
+    virtual void visit(AstCase* nodep) {
+        V3Config::applyCase(nodep);
+        cleanFileline(nodep);
+        iterateChildren(nodep);
+    }
+
     virtual void visit(AstNode* nodep) {
         // Default: Just iterate
         cleanFileline(nodep);