+CHECK_WITH([shuttle],[shuttle device],[SHUTTLE],[yes])
+CHECK_WITH([wintv],[usb 2040:826d wintv device],[WINTV],[yes])
+CHECK_WITH([x10tv],[usb 0bc7:0004 X10 remote device],[X10TV],[yes])
+CHECK_WITH([vaapi],[video acceleration api],[VAAPI],[yes])
+CHECK_WITH([vdpau],[video decode+presentation api for unix],[VDPAU],[yes])
+CHECK_WITH([nv],[nvenc/nvdec ffnvcodec api],[NV],[yes])
+CHECK_WITH([cuda],[nv cuda plugins],[CUDA],[auto])
+CHECK_WITH([clang],[use clang instead of gcc/g++],[CLANG],[no])