Add includedirexcldep makgen.xml flag

- New flag is used to add include directories without making them part
  of the include dependency graph.
- Can be used to remove dependency graphs for include directories that
  aren't generally modified, like operating system library include
  directories

src/ConfigUtils.h

@@ -18,7 +18,7 @@ struct ConfigCache
 enum class ConfigSetting
 {
   // vectors
-  Library = 0, LibraryDir = 1, IncludeDir = 2, Define = 3, Dependency = 4, CFlag = 5, LFlag = 6, ExcludeSource = 7, ExcludeHeader = 8, ExecPreArgument = 9, ExecArgument = 10, SourceFile = 11,
+  Library = 0, LibraryDir = 1, IncludeDir = 2, Define = 3, Dependency = 4, CFlag = 5, LFlag = 6, ExcludeSource = 7, ExcludeHeader = 8, ExecPreArgument = 9, ExecArgument = 10, SourceFile = 11, IncludeDirExclDep = 12,
   // Strings
   SourceDir = 32, OutputDir = 33, OutputName = 34, OutputType = 35, ProjectName = 36, HFileName = 37,
   // Bools
@@ -71,6 +71,8 @@ struct ConfigUtils
         return "generatehfile";
       case ConfigSetting::SourceFile:
         return "sourcefile";
+      case ConfigSetting::IncludeDirExclDep:
+        return "includedirexcldep";
       case ConfigSetting::Invalid:
         return "invalid";
     }
@@ -86,6 +88,7 @@ struct ConfigUtils
       case ConfigSetting::LibraryDir:
       case ConfigSetting::IncludeDir:
       case ConfigSetting::Dependency:
+      case ConfigSetting::IncludeDirExclDep:
         return true;
       case ConfigSetting::OutputName:
       case ConfigSetting::OutputType:
@@ -131,6 +134,7 @@ struct ConfigUtils
       case ConfigSetting::ExecArgument:
       case ConfigSetting::GenerateHFile:
       case ConfigSetting::SourceFile:
+      case ConfigSetting::IncludeDirExclDep:
       case ConfigSetting::Invalid:
         return false;
     }
@@ -153,6 +157,7 @@ struct ConfigUtils
       case ConfigSetting::ExecPreArgument:
       case ConfigSetting::ExecArgument:
       case ConfigSetting::SourceFile:
+      case ConfigSetting::IncludeDirExclDep:
         return true;
       case ConfigSetting::SourceDir:
       case ConfigSetting::OutputDir:
@@ -191,6 +196,7 @@ struct ConfigUtils
       case ConfigSetting::ExecArgument:
       case ConfigSetting::SourceFile:
       case ConfigSetting::Invalid:
+      case ConfigSetting::IncludeDirExclDep:
         return false;
     }
     return false;