1AC_DEFUN([AC_PLUGINS],
2[
3  maybe_plugins=no
4  AC_CHECK_HEADERS([dlfcn.h], [maybe_plugins=yes], [], [AC_INCLUDES_DEFAULT])
5  AC_CHECK_HEADERS([windows.h], [maybe_plugins=yes], [], [AC_INCLUDES_DEFAULT])
6
7  AC_ARG_ENABLE([plugins],
8    AS_HELP_STRING([--enable-plugins], [Enable support for plugins]),
9    [case "${enableval}" in
10      no) plugins=no ;;
11      *) plugins=yes
12         if test "$maybe_plugins" != "yes" ; then
13	   AC_MSG_ERROR([Building with plugin support requires a host that supports dlopen.])
14	 fi ;;
15     esac],
16    [plugins=$maybe_plugins]
17  )
18  if test "$plugins" = "yes"; then
19    AC_SEARCH_LIBS([dlopen], [dl])
20  fi
21])
22