ENH: fix crash in cpack when CPACK_CYGWIN_PATCH_NUMBER not specified

CMakeCPackOptions.cmake.in

@@ -32,8 +32,9 @@ if(CPACK_GENERATOR MATCHES "NSIS")
   SET(CPACK_NSIS_CONTACT @CPACK_PACKAGE_CONTACT@)
   SET(CPACK_NSIS_MODIFY_PATH ON)
 endif(CPACK_GENERATOR MATCHES "NSIS")
-# include the cpack options 
-INCLUDE("@QT_DIALOG_CPACK_OPTIONS_FILE@")
+# include the cpack options for qt dialog if they exisit
+# they might not if qt was not enabled for the build
+INCLUDE("@QT_DIALOG_CPACK_OPTIONS_FILE@" OPTIONAL)
 
 if(CPACK_GENERATOR MATCHES "CygwinSource")
   # when packaging source make sure the .build directory is not included

Source/CPack/cmCPackCygwinBinaryGenerator.cxx

@@ -106,7 +106,7 @@ const char* cmCPackCygwinBinaryGenerator::GetOutputExtension()
                   "CPACK_CYGWIN_PATCH_NUMBER not specified using 1"
                   << std::endl);
     }
-  this->OutputExtension += 
+  this->OutputExtension += patchNumber;
   this->OutputExtension += ".tar.bz2";
   return this->OutputExtension.c_str();
 }

Source/CPack/cmCPackCygwinSourceGenerator.cxx

@@ -124,7 +124,14 @@ int cmCPackCygwinSourceGenerator::CompressFiles(const char* outFileName,
   std::string outerTarFile
     = this->GetOption("CPACK_TEMPORARY_DIRECTORY");
   outerTarFile += "-";
-  outerTarFile += this->GetOption("CPACK_CYGWIN_PATCH_NUMBER");
+  const char* patch = this->GetOption("CPACK_CYGWIN_PATCH_NUMBER");
+  if(!patch)
+    {
+    cmCPackLogger(cmCPackLog::LOG_WARNING, "CPACK_CYGWIN_PATCH_NUMBER"
+                  << " not specified, defaulting to 1\n");
+    patch = "1";
+    }
+  outerTarFile += patch;
   outerTarFile += "-src.tar";
   std::string buildScript = cmSystemTools::GetFilenameName(
     this->GetOption("CPACK_CYGWIN_BUILD_SCRIPT"));
@@ -176,7 +183,14 @@ const char* cmCPackCygwinSourceGenerator::GetPackagingInstallPrefix()
 const char* cmCPackCygwinSourceGenerator::GetOutputExtension()
 {
   this->OutputExtension = "-";
-  this->OutputExtension += this->GetOption("CPACK_CYGWIN_PATCH_NUMBER");
+  const char* patch = this->GetOption("CPACK_CYGWIN_PATCH_NUMBER"); 
+  if(!patch)
+    {
+    cmCPackLogger(cmCPackLog::LOG_WARNING, "CPACK_CYGWIN_PATCH_NUMBER"
+                  << " not specified, defaulting to 1\n");
+    patch = "1";
+    }
+  this->OutputExtension += patch;
   this->OutputExtension += "-src.tar.bz2";
   return this->OutputExtension.c_str();
 }

Source/CPack/cmCPackGenerator.cxx

@@ -817,7 +817,15 @@ bool cmCPackGenerator::IsSet(const char* name) const
 //----------------------------------------------------------------------
 const char* cmCPackGenerator::GetOption(const char* op)
 { 
-  return this->MakefileMap->GetDefinition(op);
+  const char* ret = this->MakefileMap->GetDefinition(op);
+  if(!ret)
+    { 
+    cmCPackLogger(cmCPackLog::LOG_DEBUG, 
+                  "Warning, GetOption return NULL for: "
+                  << op 
+                  << std::endl);
+    }
+  return ret;
 }
 
 //----------------------------------------------------------------------