Address requested change

CMakeLists.txt

@@ -15,6 +15,7 @@ SET(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake;${CMAKE_MODULE_PATH}")
 include(cmake/DefaultBuildType.cmake)
 include(cmake/UnsetIfUpdated.cmake)
 include(cmake/CheckNameExists.cmake)
+include(cmake/CheckStructHasBitField.cmake)
 
 # Intialize git submodules if not done already
 include(cmake/GitSubmoduleUpdate.cmake)
@@ -134,6 +135,12 @@ if(NOT CLOCK_GETTIME_FOUND)
     unset(CMAKE_REQUIRED_LIBRARIES)
 endif()
 
+CHECK_STRUCT_HAS_BITFIELD("struct perf_event_attr" context_switch linux/perf_event.h HAVE_PERF_RECORD_SWITCH)
+
+if(NOT HAVE_PERF_RECORD_SWITCH)
+    message(FATAL_ERROR "lo2s requires support for perf context switch recording. Make sure that you are running on a kernel that support context_switch with perf_event_open")
+endif()
+
 # detect version of running kernel
 string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" LINUX_VERSION ${CMAKE_SYSTEM_VERSION})