Fixed cmake 2.4 failing if data/levels contains a dir without levels

SVN-Revision: 5213

diff --git a/CMakeLists.txt b/CMakeLists.txt
index b49edf8..9f65048 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,12 +32,6 @@
 #
 
 
-#
-# Open Issues:
-#  - none?
-#
-
-
 ## Project name to use as command prefix
 
 PROJECT(SUPERTUX)
@@ -242,6 +236,8 @@ IF(GENERATE_MESSAGESPOT)
     FOREACH(SUPERTUX_LEVEL_DIR ${SUPERTUX_LEVEL_DIRS})
       FILE(GLOB SUPERTUX_LEVELS RELATIVE ${SUPERTUX_SOURCE_DIR} ${SUPERTUX_LEVEL_DIR}/*.stl ${SUPERTUX_LEVEL_DIR}/*.stwm ${SUPERTUX_LEVEL_DIR}/*.txt)
 
+      ## Do not add target if SUPERTUX_LEVELS is empty. This is needed for cmake <=2.4
+      IF(SUPERTUX_LEVELS)
       SET(MESSAGES_POT_FILE ${SUPERTUX_SOURCE_DIR}/${SUPERTUX_LEVEL_DIR}/messages.pot)
       ADD_CUSTOM_COMMAND(
         OUTPUT ${MESSAGES_POT_FILE}
@@ -252,6 +248,7 @@ IF(GENERATE_MESSAGESPOT)
         COMMENT "Generating POT file ${MESSAGES_POT_FILE}"
       )
       LIST(APPEND MESSAGES_POT_FILES ${MESSAGES_POT_FILE})
+      ENDIF(SUPERTUX_LEVELS)
 
     ENDFOREACH(SUPERTUX_LEVEL_DIR)