From e1222202dd1f980cc541e81f297b82360c9c2b51 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sun, 12 May 2013 17:41:59 +0200
Subject: [PATCH] 0001097: CMake stops with error: Circular ... <- ...
 dependency dropped.

---
 CMakeLists.txt               | 6 ++++++
 data/examples/CMakeLists.txt | 5 ++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 104dffe66..17cda74bc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -439,8 +439,14 @@ IF(APPLE)
 	SET(CMAKE_SHARED_LIBRARY_SUFFIX ".so")
 ENDIF(APPLE)
 
+# force build directory to be different to source directory
+#if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
+#MESSAGE(SEND_ERROR "The build directory (${CMAKE_BINARY_DIR}) must be different to the source directory "
+#                   "(${CMAKE_SOURCE_DIR}). Please choose another build directory!")
+#elseif()
 add_subdirectory(src)
 add_subdirectory(data)
+#endif()
 
 # ================================================================================
 # == Packaging ===================================================================
diff --git a/data/examples/CMakeLists.txt b/data/examples/CMakeLists.txt
index eb0e2f991..4c92d776b 100644
--- a/data/examples/CMakeLists.txt
+++ b/data/examples/CMakeLists.txt
@@ -12,7 +12,10 @@ ADD_CUSTOM_TARGET(Example_data ALL
     SOURCES ${Examples_Files}
 )
 
-fc_copy_sources(Examples "${CMAKE_BINARY_DIR}/data/examples" ${Examples_Files})
+# 0001097: CMake stops with error "Circular ... <- ... dependency dropped."
+if(NOT "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
+    fc_copy_sources(Examples "${CMAKE_BINARY_DIR}/data/examples" ${Examples_Files})
+endif()
 
 INSTALL(
     FILES