ENH: turn off extra rules for nmake and wmake

Source/cmLocalUnixMakefileGenerator3.cxx

@@ -738,18 +738,22 @@ cmLocalUnixMakefileGenerator3
     makefileStream, "Disable implicit rules so canoncical targets will work.",
     ".SUFFIXES", no_depends, no_commands, false);
 
-  // turn off RCS and SCCS automatic stuff from gmake
-  makefileStream << "# Remove some rules from gmake that .SUFFIXES does not remove.\n"
-                 << "# This makes gmake faster as it does not try to run implicit rules\n"
-                 << "# on targets that never exist.\n"
-                 << "%: %,v\n"
-                 << "%: RCS/%,v\n"
-                 << "%: RCS/%\n"
-                 << "%: s.%\n"
-                 << "%: %.w\n"
-                 << "%.c: %.w %.ch\n"
-                 << "%: %.tex\n"
-                 << "%: SCCS/s.%\n\n";
+  if(!this->NMake && !this->WatcomWMake)
+    {
+    // turn off RCS and SCCS automatic stuff from gmake
+    makefileStream << "# Remove some rules from gmake that .SUFFIXES does not remove.\n"
+                   << "# This makes gmake faster as it does not try to run implicit rules\n"
+                   << "# on targets that never exist.\n"
+                   << "SUFFIXES =\n"
+                   << "%: %,v\n"
+                   << "%: RCS/%,v\n"
+                   << "%: RCS/%\n"
+                   << "%: s.%\n"
+                   << "%: %.w\n"
+                   << "%.c: %.w %.ch\n"
+                   << "%: %.tex\n"
+                   << "%: SCCS/s.%\n\n";
+    }
   // Add a fake suffix to keep HP happy.  Must be max 32 chars for SGI make.
   std::vector<std::string> depends;
   depends.push_back(".hpux_make_needs_suffix_list");