Rename msg to rule in configuration files (#2080)

Rename the -msg switch to -rule in configuration files as it is more
clear.

resolves #2068

bin/verilator

@@ -2737,8 +2737,8 @@ controlled by configuration files, typically named with the .vlt
 extension. An example:
 
   `verilator_config
-  lint_off -msg WIDTH
+  lint_off -rule WIDTH
-  lint_off -msg CASEX  -file "silly_vendor_code.v"
+  lint_off -rule CASEX  -file "silly_vendor_code.v"
 
 This disables WIDTH warnings globally, and CASEX for a specific file.
 
@@ -2767,9 +2767,9 @@ Enable/disable coverage for the specified filename (or wildcard with '*' or
 omitted).  Often used to ignore an entire module for coverage analysis
 purposes.
 
-=item lint_on  [-msg <message>] [-file "<filename>" [-lines <line> [ - <line>]]]
+=item lint_on  [-rule <message>] [-file "<filename>" [-lines <line> [ - <line>]]]
 
-=item lint_off [-msg <message>] [-file "<filename>" [-lines <line> [ - <line>]]]
+=item lint_off [-rule <message>] [-file "<filename>" [-lines <line> [ - <line>]]]
 
 Enable/disables the specified lint warning, in the specified filename (or
 wildcard with '*' or '?', or all files if omitted) and range of line
@@ -2778,10 +2778,13 @@ numbers (or all lines if omitted).
 With lint_off using '*' will override any lint_on directives in the source,
 i.e. the warning will still not be printed.
 
-If the -msg is omitted, all lint warnings (see list in -Wno-lint) are
+If the -rule is omitted, all lint warnings (see list in -Wno-lint) are
 enabled/disabled.  This will override all later lint warning enables for
 the specified region.
 
+In previous versions -rule was named -msg. The latter is deprecated, but
+still works with a deprecation info, it may be removed in future versions.
+
 =item tracing_on  [-file "<filename>" [-lines <line> [ - <line> ]]]
 
 =item tracing_off [-file "<filename>" [-lines <line> [ - <line> ]]]

src/verilog.l

@@ -145,6 +145,7 @@ vnum    {vnum1}|{vnum2}|{vnum3}|{vnum4}|{vnum5}
   -?"-file"             { FL; return yVLT_D_FILE; }
   -?"-lines"            { FL; return yVLT_D_LINES; }
   -?"-msg"              { FL; return yVLT_D_MSG; }
+  -?"-rule"             { FL; return yVLT_D_RULE; }
 }
 
   /************************************************************************/

src/verilog.y

@@ -283,6 +283,7 @@ class AstSenTree;
 %token<fl>		yVLT_D_FILE	"--file"
 %token<fl>		yVLT_D_LINES	"--lines"
 %token<fl>		yVLT_D_MSG	"--msg"
+%token<fl>		yVLT_D_RULE	"--rule"
 
 %token<strp>		yaD_IGNORE	"${ignored-bbox-sys}"
 %token<strp>		yaD_DPI		"${dpi-sys}"
@@ -5596,6 +5597,10 @@ vltOffFront<errcodeen>:
 	|	yVLT_TRACING_OFF			{ $$ = V3ErrorCode::I_TRACING; }
 	|	yVLT_LINT_OFF				{ $$ = V3ErrorCode::I_LINT; }
 	|	yVLT_LINT_OFF yVLT_D_MSG yaID__ETC
+			{ $$ = V3ErrorCode((*$3).c_str());
+			  if ($$ == V3ErrorCode::EC_ERROR) { $1->v3error("Unknown Error Code: "<<*$3<<endl); }
+			  $1->v3info("Deprecated -msg in configuration files, use -rule instead."<<endl); }
+	|	yVLT_LINT_OFF yVLT_D_RULE yaID__ETC
 			{ $$ = V3ErrorCode((*$3).c_str());
 			  if ($$ == V3ErrorCode::EC_ERROR) { $1->v3error("Unknown Error Code: "<<*$3<<endl);  } }
 	;
@@ -5605,6 +5610,10 @@ vltOnFront<errcodeen>:
 	|	yVLT_TRACING_ON				{ $$ = V3ErrorCode::I_TRACING; }
 	|	yVLT_LINT_ON				{ $$ = V3ErrorCode::I_LINT; }
 	|	yVLT_LINT_ON yVLT_D_MSG yaID__ETC
+			{ $$ = V3ErrorCode((*$3).c_str());
+			  if ($$ == V3ErrorCode::EC_ERROR) { $1->v3error("Unknown Error Code: "<<*$3<<endl);  }
+			  $1->v3info("Deprecated -msg in configuration files, use -rule instead."<<endl); }
+	|	yVLT_LINT_ON yVLT_D_RULE yaID__ETC
 			{ $$ = V3ErrorCode((*$3).c_str());
 			  if ($$ == V3ErrorCode::EC_ERROR) { $1->v3error("Unknown Error Code: "<<*$3<<endl);  } }
 	;

test_regress/t/t_vlt_warn.v

@@ -6,7 +6,7 @@
 // Try inline config
 `ifdef verilator
   `verilator_config
-    lint_off -msg CASEX -file "t/t_vlt_warn.v"
+    lint_off -rule CASEX -file "t/t_vlt_warn.v"
   `verilog
 `endif
 

test_regress/t/t_vlt_warn.vlt

@@ -5,12 +5,12 @@
 
 `verilator_config
 
-lint_off -msg CASEINCOMPLETE -file "t/t_vlt_warn.v"
+lint_off -msg  CASEINCOMPLETE -file "t/t_vlt_warn.v" // Deprecation info about msg
-lint_off -msg WIDTH          -file "t/t_vlt_warn.v" -lines 18
+lint_off -rule WIDTH          -file "t/t_vlt_warn.v" -lines 18
 // Test wildcard filenames
-lint_off -msg WIDTH          -file "*/t_vlt_warn.v" -lines 19-19
+lint_off -rule WIDTH          -file "*/t_vlt_warn.v" -lines 19-19
 // Test global disables
-lint_off                     -file "*/t_vlt_warn.v" -lines 20-20
+lint_off                      -file "*/t_vlt_warn.v" -lines 20-20
 
 coverage_off -file "t/t_vlt_warn.v"
 // Test --flag is also accepted