Windows: default install dir is C, check for previous installation

CMakeLists.txt

@@ -13,7 +13,7 @@ set(BornAgain_VERSION_PATCH 2)
 
 # --- General project settings ---
 option(BORNAGAIN_PYTHON "Build with python support" ON)
-option(BORNAGAIN_APP "Build test application" ON)
+option(BORNAGAIN_APP "Build test application" OFF)
 option(BORNAGAIN_GUI "Build a graphical user interface" OFF)
 option(BORNAGAIN_MAN "Build a user manual" OFF)
 option(BUILD_DEBIAN "Build a debian package" OFF)

cmake/CMakeLists.txt

 # this script is a trick to print the message at the end of installation
 
+if(NOT WIN32)
 set(after_install_text "
 Installation done. Please read below.
 -------------------------------------------------------------------------------
@@ -13,3 +14,4 @@ Just add this command into your .bashrc or .bash_profile file.
 
 install(CODE "MESSAGE(\"${after_install_text}\")")
 
+endif()

cmake/modules/CPackWindows.cmake

@@ -3,7 +3,8 @@
 set(CPACK_GENERATOR "NSIS")  
 
 #set(CPACK_NSIS_MODIFY_PATH ON)
-
+set( CPACK_NSIS_INSTALL_ROOT "C:")
+set(CPACK_NSIS_ENABLE_UNINSTALL_BEFORE_INSTALL ON)
 
 set (CPACK_NSIS_EXTRA_INSTALL_COMMANDS "
   Push \\\"PATH\\\"