+if (CMAKE_EXECUTABLE_FORMAT STREQUAL "ELF")
+ add_subdirectory (thirdparty/libbacktrace)
+ include_directories (${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/libbacktrace)
+ set (LIBBACKTRACE_LIBRARIES dl backtrace)
+ add_definitions (-DHAVE_BACKTRACE=1)
+endif ()
+