Hi, songbird's autotools wrote: > configure: WARNING: sys/ioctl.h: see the Autoconf documentation > configure: WARNING: sys/ioctl.h: section "Present But Cannot Be
According to https://www.gnu.org/software/autoconf/manual/autoconf-2.64/html_node/Present-But-Cannot-Be-Compiled.html you will have to find out where your auto-empire (starting at your configure.ac) has a test which matches this grep expression: AC_CHECK_HEADER[S]*(.*sys/ioctl.h.* and either fix it by giving the necessary helper headers or by just throwing it out. The helper headers would have to be determined by try and error and then included in the fourth argument code snippet like "number.h" in the autoconf documentation example. Throwing out the test might suppress early failure on systems which have no sys/ioctl.h or might prevent workarounds if it is missing. This depends much on the second and third argument of the macro: [action-if-found], [action-if-not-found]. See also https://www.gnu.org/software/autoconf/manual/autoconf-2.64/html_node/Generic-Headers.html#Generic-Headers A quick look into my own code shows that i happily include <sys/ioctl.h> but never check for its existence. Works on all contemporary Unixes and with Cygwin. Have a nice day :) Thomas
