Install ArrayFire to /opt/ArrayFire for *nix

Author: mlloreda

CMakeModules/CPackConfig.cmake

@@ -70,6 +70,7 @@ endif()
 # - Windows
 #   - NSIS64 Generator
 if(APPLE)
+  set(CPACK_PACKAGING_INSTALL_PREFIX "/opt/arrayfire")
   set(OSX_INSTALL_SOURCE ${PROJECT_SOURCE_DIR}/CMakeModules/osx_install)
   set(WELCOME_FILE       "${OSX_INSTALL_SOURCE}/welcome.html.in")
   set(WELCOME_FILE_OUT   "${CMAKE_CURRENT_BINARY_DIR}/welcome.html")
@@ -109,6 +110,7 @@ elseif(WIN32)
     set(CPACK_NSIS_INSTALL_ROOT "$PROGRAMFILES")
   endif (CMAKE_CL_64)
 else()
+  set(CPACK_PACKAGING_INSTALL_PREFIX "/opt/arrayfire")
   set(CPACK_RESOURCE_FILE_LICENSE "${ArrayFire_SOURCE_DIR}/LICENSE")
   set(CPACK_RESOURCE_FILE_README "${ArrayFire_SOURCE_DIR}/README.md")
 endif()