some platform specific cmake stuff

src/CMakeLists.txt

 CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
 PROJECT( BrainCognize )
 
+# First of all find out which platform we are on
+# and set our own platform variable
+SET( BRAINCOGNIZE_PLATFORM_LINUX "Linux" )
+SET( BRAINCOGNIZE_PLATFORM_WINDOWS "Windows" )
+
+IF( CMAKE_HOST_SYSTEM MATCHES Linux )
+  SET( BRAINCOGNIZE_PLATFORM 
+       ${BRAINCOGNIZE_PLATFORM_LINUX} 
+       CACHE STRING "The platform we are building on." )
+ENDIF( CMAKE_HOST_SYSTEM MATCHES Linux )
+IF( CMAKE_HOST_SYSTEM MATCHES Windows )
+  SET( BRAINCOGNIZE_PLATFORM 
+       ${BRAINCOGNIZE_PLATFORM_WINDOWS}
+       CACHE STRING "The platform we are building on." )
+ENDIF( CMAKE_HOST_SYSTEM MATCHES Windows )
+
 # Package dependencies:
 FIND_PACKAGE( Qt4 REQUIRED )
 FIND_PACKAGE( OpenGL REQUIRED )
@@ -17,9 +33,20 @@ SET( QT_LINK_LIBRARIES ${QT_QTCORE_LIBRARY}
                        ${QT_QTGUI_LIBRARY}
                        ${QT_QTOPENGL_LIBRARY} )
 
-SET( LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib )
+IF( BRAINCOGNIZE_PLATFORM MATCHES ${BRAINCOGNIZE_PLATFORM_WINDOWS} )
+  SET( LIBRARY_OUTPUT_PATH 
+       ${PROJECT_BINARY_DIR}/bin 
+       CACHE PATH "The libraries will be put into this directory.")
+  MESSAGE( STATUS "WIN" )
+ELSE( BRAINCOGNIZE_PLATFORM MATCHES ${BRAINCOGNIZE_PLATFORM_WINDOWS} )
+  SET( LIBRARY_OUTPUT_PATH 
+       ${PROJECT_BINARY_DIR}/lib 
+       CACHE PATH "The libraries will be put into this directory.")
+  MESSAGE( STATUS "LIN" )
+ENDIF( BRAINCOGNIZE_PLATFORM MATCHES ${BRAINCOGNIZE_PLATFORM_WINDOWS} )
 MARK_AS_ADVANCED( LIBRARY_OUTPUT_PATH )
-SET( EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin )
+
+SET( EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin CACHE PATH "The executables will be put into this directory.")
 MARK_AS_ADVANCED( EXECUTABLE_OUTPUT_PATH )
 
 IF( CXXTEST_FOUND )