Only use include_directory() if the directory path is defined

2015-02-27 12:40:50 +01:00
parent 0ec82c104d
commit e6569a1090
2 changed files with 13 additions and 5 deletions
@@ -74,10 +74,18 @@ include_directories(${ICONV_INCLUDE_DIRS})
 include_directories(${LIBUUID_INCLUDE_DIRS})

 # If they are found in louloulibs CMakeLists.txt, we inherite these values
-include_directories(${LIBIDN_INCLUDE_DIRS})
-include_directories(${SYSTEMD_INCLUDE_DIRS})
-include_directories(SYSTEM ${BOTAN_INCLUDE_DIRS})
-include_directories(${CARES_INCLUDE_DIRS})
+if(LIBIDN_FOUND)
+  include_directories(${LIBIDN_INCLUDE_DIRS})
+endif()
+if(SYSTEMD_FOUND)
+  include_directories(${SYSTEMD_INCLUDE_DIRS})
+endif()
+if(BOTAN_FOUND)
+  include_directories(SYSTEM ${BOTAN_INCLUDE_DIRS})
+endif()
+if(CARES_FOUND)
+  include_directories(${CARES_INCLUDE_DIRS})
+endif()

 #
 ## irclib