> On 4 Feb 2023, at 13:42, Florian Weimer <fweimer@xxxxxxxxxx> wrote: > > 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. There's a tendency for quoting to go wrong with shell conditionals overall, which is why I try to push people towards AS_IF.
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