AS_IF([test ! -z "${zfsdevel}"], [
AS_IF([test -d "${zfsdevel}/usr/include/libspl" && test -d "${zfsdevel}/usr/include/libzfs"], [
zfsinc="-I $zfsdevel/usr/include/libspl -I $zfsdevel/usr/include/libzfs"
AS_IF([test ! -z "${zfsdevel}"], [
AS_IF([test -d "${zfsdevel}/usr/include/libspl" && test -d "${zfsdevel}/usr/include/libzfs"], [
zfsinc="-I $zfsdevel/usr/include/libspl -I $zfsdevel/usr/include/libzfs"