Add sys/sysctl.h to get sysctlbyname declaration on kFreeBSD
Updated by Thorsten “mirabilos” Glaser <t.glaser@tarent.de>
to add autoconf check and only include <sys/sysctl.h> if it
is detected by configure as it’s unusable on Linux/x32 (and
others, e.g. other new architectures).
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
AC_SYS_LARGEFILE
AC_FUNC_ALLOCA
-AC_CHECK_HEADERS([sys/mkdev.h])
+AC_CHECK_HEADERS([sys/mkdev.h sys/sysctl.h])
# Initialize libtool
LT_PREREQ([2.2])
#include <stdint.h>
#include <stdlib.h>
#include <sys/ioctl.h>
+#ifdef HAVE_SYS_SYSCTL_H
+#include <sys/sysctl.h>
+#endif
#include <stdio.h>
#include <stdbool.h>