patch by Sandro Tolaini to do good (better?) on FreeBSD

ltmain.sh

@@ -1043,14 +1043,14 @@ compiler."
 	    # These systems don't actually have a C library (as such)
 	    test "X$arg" = "X-lc" && continue
 	    ;;
-	  *-*-openbsd*)
+	  *-*-openbsd* | *-*-freebsd*)
 	    # Do not include libc due to us having libc/libc_r.
 	    test "X$arg" = "X-lc" && continue
 	    ;;
 	  esac
 	 elif test "X$arg" = "X-lc_r"; then
 	  case $host in
-	  *-*-openbsd*)
+	  *-*-openbsd* | *-*-freebsd*)
 	    # Do not include libc_r directly, use -pthread flag.
 	    continue
 	    ;;
@@ -2441,7 +2441,7 @@ compiler."
 	  *-*-netbsd*)
 	    # Don't link with libc until the a.out ld.so is fixed.
 	    ;;
-	  *-*-openbsd*)
+	  *-*-openbsd* | *-*-freebsd*)
 	    # Do not include libc due to us having libc/libc_r.
 	    ;;
 	  *)