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      1  1.1  mrg AC_DEFUN([AC_PLUGINS],
      2  1.1  mrg [
      3  1.5  mrg   maybe_plugins=no
      4  1.5  mrg   AC_CHECK_HEADERS([dlfcn.h], [maybe_plugins=yes], [], [AC_INCLUDES_DEFAULT])
      5  1.5  mrg   AC_CHECK_HEADERS([windows.h], [maybe_plugins=yes], [], [AC_INCLUDES_DEFAULT])
      6  1.5  mrg 
      7  1.5  mrg   AC_ARG_ENABLE([plugins],
      8  1.5  mrg     AS_HELP_STRING([--enable-plugins], [Enable support for plugins]),
      9  1.5  mrg     [case "${enableval}" in
     10  1.5  mrg       no) plugins=no ;;
     11  1.5  mrg       *) plugins=yes
     12  1.5  mrg          if test "$maybe_plugins" != "yes" ; then
     13  1.5  mrg 	   AC_MSG_ERROR([Building with plugin support requires a host that supports dlopen.])
     14  1.5  mrg 	 fi ;;
     15  1.5  mrg      esac],
     16  1.5  mrg     [plugins=$maybe_plugins]
     17  1.5  mrg   )
     18  1.5  mrg   if test "$plugins" = "yes"; then
     19  1.8  mrg     AC_SEARCH_LIBS([dlsym], [dl])
     20  1.5  mrg   fi
     21  1.1  mrg ])
     22