ENH: add a way to suppress the new policy warnings, still need ccmake and gui's

Source/cmMakefile.cxx

@@ -296,7 +296,16 @@ void cmMakefile::IssueMessage(cmake::MessageType t, std::string const& text) con
     }
   else
     {
-    msg << "CMake Warning:";
+    msg << "CMake Warning";
+    if(t == cmake::AUTHOR_WARNING)
+      {
+      if(this->IsOn("CMAKE_SUPPRESS_DEVELOPER_WARNINGS"))
+        {
+        return;
+        }
+      msg << "(Code)";
+      }
+    msg << ":";
     }
 
   // Add the immediate context.
@@ -2462,7 +2471,16 @@ int cmMakefile::TryCompile(const char *srcdir, const char *bindir,
   // to save time we pass the EnableLanguage info directly
   gg->EnableLanguagesFromGenerator
     (this->LocalGenerator->GetGlobalGenerator());
-
+  if(this->IsOn("CMAKE_SUPPRESS_DEVELOPER_WARNINGS"))
+    {
+    cm.AddCacheEntry("CMAKE_SUPPRESS_DEVELOPER_WARNINGS",
+                     "TRUE", "", cmCacheManager::INTERNAL);
+    }
+  else
+    {
+    cm.AddCacheEntry("CMAKE_SUPPRESS_DEVELOPER_WARNINGS",
+                     "FALSE", "", cmCacheManager::INTERNAL);
+    }    
   if (cm.Configure() != 0)
     {
     cmSystemTools::Error(

Source/cmake.cxx

@@ -373,6 +373,23 @@ bool cmake::SetCacheArgs(const std::vector<std::string>& args)
         return false;
         }
       }
+    else if(arg.find("-Wno-dev",0) == 0)
+      {
+      this->CacheManager->
+        AddCacheEntry("CMAKE_SUPPRESS_DEVELOPER_WARNINGS", "TRUE",
+                      "Suppress Warnings that are meant for"
+                      " the author of the CMakeLists.txt files.",
+                      cmCacheManager::INTERNAL);
+      }
+    else if(arg.find("-Wdev",0) == 0)
+      {
+      this->CacheManager->
+        AddCacheEntry("CMAKE_SUPPRESS_DEVELOPER_WARNINGS", "FALSE",
+                      "Suppress Warnings that are meant for"
+                      " the author of the CMakeLists.txt files.",
+                      cmCacheManager::INTERNAL);
+      
+      }
     else if(arg.find("-U",0) == 0)
       {
       std::string entryPattern = arg.substr(2);

Source/cmakemain.cxx

@@ -81,6 +81,12 @@ static const char * cmDocumentationOptions[][3] =
    "variables being created. If A is specified, then it will display also "
    "advanced variables. If H is specified, it will also display help for "
    "each variable."},
+  {"-Wno-dev", "Suppress developer warnings.",
+   "Suppress warnings that are meant for the author"
+   " of the CMakeLists.txt files."},
+  {"-Wdev", "Enable developer warnings.",
+   "Enable warnings that are meant for the author"
+   " of the CMakeLists.txt files."},
   {"-N", "View mode only.",
    "Only load the cache. Do not actually run configure and generate steps."},
   {"-P <file>", "Process script mode.",