diff -Naur SDL2-2.0.9/configure.in SDL2-2.0.9-patched/configure.in
--- SDL2-2.0.9/configure.in	2018-11-03 15:06:14.850371202 +0100
+++ SDL2-2.0.9-patched/configure.in	2018-11-03 16:59:08.199290985 +0100
@@ -3819,6 +3819,12 @@
             SOURCES="$SOURCES $srcdir/src/timer/unix/*.c"
             have_timers=yes
         fi
+        # Set up files for the sensor library
+        if test x$enable_sensor = xyes; then
+            AC_DEFINE(SDL_SENSOR_COREMOTION, 1, [ ])
+            SOURCES="$SOURCES $srcdir/src/sensor/coremotion/*.m"
+            have_sensor=yes
+        fi
         # Set up other core UNIX files
         SOURCES="$SOURCES $srcdir/src/core/unix/*.c"
         # The iOS platform requires special setup.