The new autoconf AC_PROG_AR macro has similar logic to what we have in
AM_PROG_AR, but less than what we need (since autoconf doesn't support
the MS archiver), so make sure we are run before AC_PROG_AR.
* m4/ar-lib.m4: Call AC_BEFORE for AC_PROG_AR.
AC_DEFUN([AM_PROG_AR],
[AC_BEFORE([$0], [LT_INIT])dnl
AC_BEFORE([$0], [AC_PROG_LIBTOOL])dnl
+AC_BEFORE([$0], [AC_PROG_AR])dnl
AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl
AC_REQUIRE_AUX_FILE([ar-lib])dnl
AC_CHECK_TOOLS([AR], [ar lib "link -lib"], [false])