--- configure.ac.orig	2017-04-24 07:30:15.000000000 -0400
+++ configure.ac	2019-05-27 13:03:39.615962000 -0400
@@ -1787,19 +1787,26 @@
 
 if test x"$libzfs_excuse" = x ; then
   # Only check for system headers if libzfs support has not been disabled.
-  AC_CHECK_HEADERS(libzfs.h libnvpair.h)
+  AC_CHECK_HEADERS(libzfs.h libnvpair.h, [], [], [
+#include <stdint.h>
+
+typedef unsigned int uint_t;
+typedef uint64_t hrtime_t;
+typedef unsigned char uchar_t;
+typedef int boolean_t;
+])
 fi
 
 if test x"$libzfs_excuse" = x ; then
   AC_CHECK_LIB([zfs], [libzfs_init],
                [],
-               [libzfs_excuse="need zfs library"])
+               [libzfs_excuse="need zfs library"], [-lavl -lnvpair -luutil -lm])
 fi
 
 if test x"$libzfs_excuse" = x ; then
   AC_CHECK_LIB([nvpair], [nvlist_lookup_string],
                [],
-               [libzfs_excuse="need nvpair library"])
+               [libzfs_excuse="need nvpair library"], [-lavl -lnvpair -luutil -lm])
 fi
 
 if test x"$enable_libzfs" = xyes && test x"$libzfs_excuse" != x ; then
@@ -1812,6 +1819,9 @@
   AC_DEFINE([HAVE_LIBZFS], [1],
             [Define to 1 if you have the ZFS library.])
   LIBNVPAIR="-lnvpair"
+  if test x$host_kernel = xkfreebsd; then
+    LIBNVPAIR="$LIBNVPAIR -lavl -luutil -lm"
+  fi
   AC_DEFINE([HAVE_LIBNVPAIR], [1],
             [Define to 1 if you have the NVPAIR library.])
 fi