Wrong CMAKE_BINARY_DIR?

Question

I have the following trivial CMakeLists.txt (FreeBSD 9.1, CMake 2.8.11.2):

project(temp_proj CXX)
message(${CMAKE_BINARY_DIR})
message(${CMAKE_SOURCE_DIR})

This file is located in /root/trunk/temp. Since I want to perform an out-of-source build, I create a sibling directory temp2 and invoke cmake from there:

root@:/root/trunk # mkdir temp2
root@:/root/trunk # cd temp2
root@:/root/trunk/temp2 # cmake ../temp
/root/trunk/temp
/root/trunk/temp
-- Configuring done
-- Generating done
-- Build files have been written to: /root/trunk/temp

How comes CMAKE_BINARY_DIR and CMAKE_SOURCE_DIR are the same? What am I doing wrong?

Answer 1

As @Fraser suggested, the issue occurred because of CMakeCache.txt file, which was left in /root/trunk/temp.