diff --git a/ChangeLog b/ChangeLog
index d15c69cf..87861221 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2005-11-05  Kean Johnston  <jkj@sco.com>,
+	    Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	* libltdl/config/ltmain.m4sh (func_mode_link) [*-*-sco3.2v5*]:
+	Don't pass through -lc, nor add it to deplibs.
+	[*-*-sysv5*]: Ditto.
+	[*-*-openbsd*, *-*-freebsd*, *-*-dragonfly*]: Remove bogus
+	`$arg'.
+
 2005-11-04  Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
 
 	* THANKS: Updated.
diff --git a/libltdl/config/ltmain.m4sh b/libltdl/config/ltmain.m4sh
index 0c012de2..498d41c7 100644
--- a/libltdl/config/ltmain.m4sh
+++ b/libltdl/config/ltmain.m4sh
@@ -2613,6 +2613,15 @@ func_mode_link ()
 	    # Rhapsody C and math libraries are in the System framework
 	    deplibs="$deplibs System.ltframework"
 	    continue
+	    ;;
+	  *-*-sco3.2v5* | *-*-sco5v6*)
+	    # Causes problems with __ctype
+	    test "X$arg" = "X-lc" && continue
+	    ;;
+	  *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*)
+	    # Compiler inserts libc in the correct place for threads to work
+	    test "X$arg" = "X-lc" && continue
+	    ;;
 	  esac
 	elif test "X$arg" = "X-lc_r"; then
 	 case $host in
@@ -4502,8 +4511,13 @@ func_mode_link ()
 	    ;;
 	  *-*-openbsd* | *-*-freebsd* | *-*-dragonfly*)
 	    # Do not include libc due to us having libc/libc_r.
-	    test "X$arg" = "X-lc" && continue
 	    ;;
+	  *-*-sco3.2v5* | *-*-sco5v6*)
+	    # Causes problems with __ctype
+	    ;;
+	  *-*-sysv4.2uw2* | *-*-sysv5* | *-*-unixware* | *-*-OpenUNIX*)
+	    # Compiler inserts libc in the correct place for threads to work
+ 	    ;;
  	  *)
 	    # Add libc to deplibs on all other systems if necessary.
 	    if test "$build_libtool_need_lc" = "yes"; then