--- libtool-1.4.2/libtool.m4.orig	Tue Sep 11 05:16:01 2001
+++ libtool-1.4.2/libtool.m4	Fri May  3 13:20:45 2002
@@ -68,8 +68,8 @@
 AC_CHECK_TOOL(RANLIB, ranlib, :)
 AC_CHECK_TOOL(STRIP, strip, :)
 
-ifdef([AC_PROVIDE_AC_LIBTOOL_DLOPEN], enable_dlopen=yes, enable_dlopen=no)
-ifdef([AC_PROVIDE_AC_LIBTOOL_WIN32_DLL],
+AC_PROVIDE_IFELSE([AC_LIBTOOL_DLOPEN], enable_dlopen=yes, enable_dlopen=no)
+AC_PROVIDE_IFELSE([AC_LIBTOOL_WIN32_DLL],
 enable_win32_dll=yes, enable_win32_dll=no)
 
 AC_ARG_ENABLE(libtool-lock,
@@ -113,7 +113,7 @@
   fi
   ;;
 
-ifdef([AC_PROVIDE_AC_LIBTOOL_WIN32_DLL],
+AC_PROVIDE_IFELSE([AC_LIBTOOL_WIN32_DLL],
 [*-*-cygwin* | *-*-mingw* | *-*-pw32*)
   AC_CHECK_TOOL(DLLTOOL, dlltool, false)
   AC_CHECK_TOOL(AS, as, false)