libtool: compile: cannot determine name of library object

[Norberto Meijome]

Hi guys and gals, I need some help here.

I'm trying to compile the maildir plugin for sylpheed-claws
( http://claws.sylpheed.org/plugins.php ). The build process dies with:

----
$ make
make  all-recursive
Making all in src
if /usr/local/bin/bash ../libtool --tag=CC --mode=compile gcc
-DHAVE_CONFIG_H -I. -I. -I..  -I/usr/local/include
-I/usr/local/include/gpgme -I/usr/X11R6/include/sylpheed-claws
-I/usr/X11R6/include/sylpheed-claws/common
-I/usr/X11R6/include/sylpheed-claws/gtk  -D_REENTRANT
-I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include
-DXTHREADS -DXUSE_MTSAFE_API -I/usr/local/include/atk-1.0
-I/usr/local/include/cairo -I/usr/local/include/glib-2.0
-I/usr/local/lib/glib-2.0/include -I/usr/X11R6/include/gtk-2.0
-I/usr/X11R6/lib/gtk-2.0/include -I/usr/X11R6/include/pango-1.0
-I/usr/X11R6/include -I/usr/local/include/freetype2
-I/usr/local/include   -g -O2 -MT maildir_la-plugin.lo -MD -MP -MF
".deps/maildir_la-plugin.Tpo" -c -o maildir_la-plugin.lo `test -f
'plugin.c' || echo './'`plugin.c;  then mv -f
".deps/maildir_la-plugin.Tpo" ".deps/maildir_la-plugin.Plo"; else rm -f
".deps/maildir_la-plugin.Tpo"; exit 1; fi libtool: compile: cannot
determine name of library object from `' *** Error code 1

Stop
in /usr/home/betom/Numard_Stuff/_SOFTWARE_BITS/Sylpheed-claws/2.0/maildir-0.19/src.
*** Error code 1

Stop
in /usr/home/betom/Numard_Stuff/_SOFTWARE_BITS/Sylpheed-claws/2.0/maildir-0.19.
*** Error code 1

Stop
in /usr/home/betom/Numard_Stuff/_SOFTWARE_BITS/Sylpheed-claws/2.0/maildir-0.19.

------

I quickly tried the rssyl- plugin from the same webpage and the build finished with the same issue.

I checked that the sylpheed-claws include files are present.
I tried using the libtool in my system instead of the one generated by 
the configure script - same result.

FreeBSD 6.1-PRERELEASE #3: Mon Feb 27 23:38:18 EST 2006

sylpheed-claws-2.0.0_1
libtool-1.5.22_2
$ gcc --version
gcc (GCC) 3.4.4 [FreeBSD] 20050518
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is
NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.

The maildir plugin is version 0.19.
The RSS plugin is version 0.4

Thanks in advanced for your time :)
Beto