--- configure.orig
+++ configure
@@ -22378,7 +22378,7 @@
 int
 main ()
 {
-pthread_t k; k * 1;
+pthread_t k; k = (pthread_t) -1;
   ;
   return 0;
 }
@@ -26520,7 +26520,7 @@
     ;;
 
     v4l)
-    if test "${have_linux_ioctl_defines}" != "yes" \
+    if test "${have_libv4l1}" != "yes" \
       || test "${have_libv4l1}" != "yes"; then
       echo "*** $be backend requires v4l libraries - $DISABLE_MSG"
       backend_supported="no"
@@ -26734,7 +26734,7 @@
     ;;
 
     v4l)
-    if test "${have_linux_ioctl_defines}" != "yes" \
+    if test "${have_libv4l1}" != "yes" \
       || test "${have_libv4l1}" != "yes"; then
       echo "*** $be backend requires v4l libraries - $DISABLE_MSG"
       backend_supported="no"