#cmakedefine HAVE_RINT
#cmakedefine HAVE_TIMEGM
#cmakedefine HAVE_ISNAN
+#cmakedefine HAVE_STD_ISNAN
#cmakedefine HAVE_WINDOWS_H
#cmakedefine HAVE_MKDTEMP
#cmakedefine GCC_ATOMIC_BUILTINS_FOUND
#cmakedefine SYSTEM_EXPAT
+#cmakedefine ENABLE_SOUND
+#cmakedefine SIMGEAR_HEADLESS