This don't work, renders "libtool: link: `pp_ftp.lo' is not a valid libtool object"

[oden@n1 snort-2.6.0]$ cat ./building/plain/src/dynamic-preprocessors/ftptelnet/pp_ftp.lo
pic_object='.libs/pp_ftp.o'

# Name of the non-PIC object.
non_pic_object='pp_ftp.o'

This works (on 2006 x86_64):

[oden@oe snort-2.6.0]$ cat ./building/plain/src/dynamic-preprocessors/ftptelnet/pp_ftp.lo
# pp_ftp.lo - a libtool object file
# Generated by ltmain.sh - GNU libtool 1.5.18 (1.1220.2.246 2005/05/16 10:00:18)
#
# Please DO NOT delete this file!
# It is necessary for linking the library.

# Name of the PIC object.
pic_object='.libs/pp_ftp.o'

# Name of the non-PIC object.
non_pic_object='pp_ftp.o'