ENH: Improve FILE GLOB_RECURSE handling of symlinks with a new CMake policy....

ENH: Improve FILE GLOB_RECURSE handling of symlinks with a new CMake policy. CMP0009 establishes NEW default behavior of not recursing through symlinks. OLD default behavior or explicit FOLLOW_SYMLINKS argument to FILE GLOB_RECURSE will still recurse through symlinks.

Glob.cxx

@@ -67,6 +67,7 @@ Glob::Glob()
   this->RecurseThroughSymlinks = true;
     // RecurseThroughSymlinks is true by default for backwards compatibility,
     // not because it's a good idea...
+  this->FollowedSymlinkCount = 0;
 }
 
 //----------------------------------------------------------------------------
@@ -266,9 +267,13 @@ void Glob::RecurseDirectory(kwsys_stl::string::size_type start,
       }
     if ( kwsys::SystemTools::FileIsDirectory(realname.c_str()) )
       {
-      if (!kwsys::SystemTools::FileIsSymlink(realname.c_str()) ||
-        this->RecurseThroughSymlinks)
+      bool isSymLink = kwsys::SystemTools::FileIsSymlink(realname.c_str());
+      if (!isSymLink || this->RecurseThroughSymlinks)
         {
+        if (isSymLink)
+          {
+          ++this->FollowedSymlinkCount;
+          }
         this->RecurseDirectory(start+1, realname, dir_only);
         }
       }

Glob.hxx.in

@@ -64,6 +64,9 @@ public:
   void SetRecurseThroughSymlinks(bool i) { this->RecurseThroughSymlinks = i; }
   bool GetRecurseThroughSymlinks() { return this->RecurseThroughSymlinks; }
 
+  //! Get the number of symlinks followed through recursion
+  unsigned int GetFollowedSymlinkCount() { return this->FollowedSymlinkCount; }
+
   //! Set relative to true to only show relative path to files.
   void SetRelative(const char* dir);
   const char* GetRelative();
@@ -98,6 +101,7 @@ protected:
   bool Recurse;
   kwsys_stl::string Relative;
   bool RecurseThroughSymlinks;
+  unsigned int FollowedSymlinkCount;
 
 private:
   Glob(const Glob&);  // Not implemented.

kwsysDateStamp.cmake

@@ -4,7 +4,7 @@
 SET(KWSYS_DATE_STAMP_YEAR  2008)
 
 # KWSys version date month component.  Format is MM.
-SET(KWSYS_DATE_STAMP_MONTH 08)
+SET(KWSYS_DATE_STAMP_MONTH 09)
 
 # KWSys version date day component.  Format is DD.
-SET(KWSYS_DATE_STAMP_DAY   20)
+SET(KWSYS_DATE_STAMP_DAY   11)