find_library: Refactor lib->lib64 conversion

Previously methods AddArchitecturePaths and AddLib64Paths were almost
identical.  Replace the latter with a call to the former.  Fix the
AddArchitecturePaths implementation to add trailing slashes to all
tested paths.

Source/cmFindLibraryCommand.cxx

@@ -105,7 +105,10 @@ bool cmFindLibraryCommand
      ->GetPropertyAsBool("FIND_LIBRARY_USE_LIB64_PATHS"))
     {
     // add special 64 bit paths if this is a 64 bit compile.
-    this->AddLib64Paths();
+    if(this->Makefile->PlatformIs64Bit())
+      {
+      this->AddArchitecturePaths("64");
+      }
     }
 
   std::string library = this->FindLibrary();
@@ -149,6 +152,7 @@ void cmFindLibraryCommand::AddArchitecturePaths(const char* suffix)
     // Now look for lib<suffix>
     s = *i;
     s += suffix;
+    s += "/";
     if(cmSystemTools::FileIsDirectory(s.c_str()))
       {
       found = true;
@@ -168,53 +172,6 @@ void cmFindLibraryCommand::AddArchitecturePaths(const char* suffix)
     }
 }
 
-void cmFindLibraryCommand::AddLib64Paths()
-{  
-  std::string voidsize =
-    this->Makefile->GetSafeDefinition("CMAKE_SIZEOF_VOID_P");
-  int size = atoi(voidsize.c_str());
-  if(size != 8)
-    {
-    return;
-    }
-  std::vector<std::string> path64;
-  bool found64 = false;
-  for(std::vector<std::string>::iterator i = this->SearchPaths.begin(); 
-      i != this->SearchPaths.end(); ++i)
-    {
-    std::string s = *i;
-    std::string s2 = *i;
-    cmSystemTools::ReplaceString(s, "lib/", "lib64/");
-    // try to replace lib with lib64 and see if it is there,
-    // then prepend it to the path
-    // Note that all paths have trailing slashes.
-    if((s != *i) && cmSystemTools::FileIsDirectory(s.c_str()))
-      {
-      path64.push_back(s);
-      found64 = true;
-      }  
-    // now just add a 64 to the path name and if it is there,
-    // add it to the path
-    s2 += "64/";
-    if(cmSystemTools::FileIsDirectory(s2.c_str()))
-      {
-      found64 = true;
-      path64.push_back(s2);
-      } 
-    // now add the original unchanged path
-    if(cmSystemTools::FileIsDirectory(i->c_str()))
-      {
-      path64.push_back(*i);
-      }
-    }
-  // now replace the SearchPaths with the 64 bit converted path
-  // if any 64 bit paths were discovered
-  if(found64)
-    {
-    this->SearchPaths = path64;
-    }
-}
-
 //----------------------------------------------------------------------------
 std::string cmFindLibraryCommand::FindLibrary()
 {

Source/cmFindLibraryCommand.h

@@ -62,7 +62,6 @@ public:
   
 protected:
   void AddArchitecturePaths(const char* suffix);
-  void AddLib64Paths();
   std::string FindLibrary();
   virtual void GenerateDocumentation();
 private: