From 5fb03eeb4a06134c20157bb9006359e47544cc8d Mon Sep 17 00:00:00 2001
From: Alexander Bock <alexander.bock@liu.se>
Date: Mon, 1 Aug 2016 14:13:42 +0200
Subject: [PATCH] CMake generator fix for when no modules are selected

---
 support/cmake/support_macros.cmake | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/support/cmake/support_macros.cmake b/support/cmake/support_macros.cmake
index 5ecebf7b91..b2781d778b 100644
--- a/support/cmake/support_macros.cmake
+++ b/support/cmake/support_macros.cmake
@@ -434,8 +434,13 @@ function (handle_internal_modules)
         endif ()
     endforeach ()
 
-    string(REPLACE ";" "" MODULE_HEADERS ${MODULE_HEADERS})
-    string(REPLACE ";" "" MODULE_CLASSES ${MODULE_CLASSES})
+    if (NOT "${MODULE_HEADERS}" STREQUAL "")
+        string(REPLACE ";" "" MODULE_HEADERS ${MODULE_HEADERS})
+    endif ()
+
+    if (NOT "${MODULE_CLASSES}" STREQUAL "")
+        string(REPLACE ";" "" MODULE_CLASSES ${MODULE_CLASSES})
+    endif ()
 
     configure_file(
         ${OPENSPACE_CMAKE_EXT_DIR}/module_registration.template