The x11vnc configure.ac script contains this: | if test "x$with_v4l" != "xno"; then | AC_CHECK_HEADER(linux/videodev.h, | [AC_DEFINE(HAVE_LINUX_VIDEODEV_H)],,) | fi This is the point where all the default header check are inserted, so when the condition is false, they are not run. Making the AC_CHECK_HEADER invocation unconditional fixes that. I want to submit this upstream. Is there are some explanation somewhere why it's not permitted to invoke AC_CHECK_HEADER under shell conditional statement? I couldn't find it in the manual. Thanks, Florian
