ENH: Add SKIP_RULE_DEPENDS option for add_custom_command()

  - Allows make rules to be created with no dependencies.
  - Such rules will not re-run even if the commands themselves change.
  - Useful to create rules that run only if the output is missing.

1 files changed, 5 insertions, 0 deletions

diff --git a/Source/cmCustomCommand.h b/Source/cmCustomCommand.h
index 70319e5..c6ad772 100644
--- a/Source/cmCustomCommand.h
+++ b/Source/cmCustomCommand.h
@@ -68,6 +68,10 @@ public:
   bool GetEscapeAllowMakeVars() const;
   void SetEscapeAllowMakeVars(bool b);
 
+  /** Set/Get whether to skip the dependency on the rule itself.  */
+  bool GetSkipRuleDepends() const;
+  void SetSkipRuleDepends(bool b);
+
   typedef std::pair<cmStdString, cmStdString> ImplicitDependsPair;
   class ImplicitDependsList: public std::vector<ImplicitDependsPair> {};
   void SetImplicitDepends(ImplicitDependsList const&);
@@ -83,6 +87,7 @@ private:
   std::string WorkingDirectory;
   bool EscapeAllowMakeVars;
   bool EscapeOldStyle;
+  bool SkipRuleDepends;
   ImplicitDependsList ImplicitDepends;
 };