1dnl ######################################################################
2dnl NTP_VPATH_HACK
3dnl
4dnl Are we using FreeBSD's make?
5dnl if we are building outside the srcdir and either
6dnl   force_ntp_vpath_hack is set
7dnl     or
8dnl   we're on freebsd and not using GNU make
9dnl then we want VPATH_HACK to be true in automake tests
10dnl
11AC_DEFUN([NTP_VPATH_HACK], [
12AC_MSG_CHECKING([to see if we need a VPATH hack])
13ntp_vpath_hack="no"
14case "$srcdir::$build_os::${force_ntp_vpath_hack+set}" in
15 .::*::*)
16    ;;
17 *::*::set)
18    ntp_vpath_hack="yes"
19    ;;
20 *::freebsd*::)
21    case "`${MAKE-make} -v -f /dev/null 2>/dev/null | grep 'GNU Make'`" in
22     '')
23	ntp_vpath_hack="yes"
24    esac
25esac
26AC_MSG_RESULT([$ntp_vpath_hack])
27AM_CONDITIONAL([VPATH_HACK], [test x$ntp_vpath_hack = xyes])
28])
29dnl ======================================================================
30