After m4 has been changed to do its temporary work in a subdirectory,
"make world" leaves a lot of /tmp/m4* directories behind.

This patch fix it for me. It is not protected by a "#ifndef vms" though.
I don't know if vms has rmdir() or not and I'm not sure if we care
about it.


Index: usr.bin/m4/main.c
RCS file: /home/ncvs/src/usr.bin/m4/main.c,v
retrieving revision 1.8
diff -u -r1.8 main.c
--- usr.bin/m4/main.c   2000/11/22 11:09:30     1.8
+++ usr.bin/m4/main.c   2001/02/20 05:58:02
@@ -227,9 +227,10 @@
                (void) remove(m4temp);
                (void) unlink(m4temp);
-               (void) rmdir(m4dir);
+       if (m4dir != NULL)
+               (void) rmdir(m4dir);
        return 0;

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