[slrn-svn] build fails: unknown symbol append_to_header

Trying to build slrn from svn fails, if I use the following options to
configure:

[snip]
% svn info
Path: .
URL: https://slrn.svn.sourceforge.net/svnroot/slrn/trunk
Repository Root: https://slrn.svn.sourceforge.net/svnroot/slrn
Repository UUID: b66dfc27-5e3b-0410-ac45-e82dab92a7d9
Revision: 251
Node Kind: directory
Schedule: normal
Last Changed Author: jedsoft
Last Changed Rev: 251
Last Changed Date: 2007-11-20 18:10:48 +0100 (Tue, 20 Nov 2007)

% grep VERSION_STRING src/version.h
#define SLRN_VERSION_STRING "pre0.9.9-60"

% ./configure --enable-strict-from --enable-mid-cache --enable-spool
[...]

% make
[...]
cd /tmp/slrn/src/objs; \
gcc art.o art_misc.o art_sort.o charset.oi decode.o editscore.o     \
    group.o grplens.o hash.o hdrutils.o help.o hooks.o interp.o     \
    menu.o mime.o misc.o post.o print.o ranges.o score.o server.o   \
    slrn.o slrndir.o snprintf.o sortdate.o startup.o strutil.o      \
    ttymsg.o util.o version.o vfile.o xover.o -o slrn   -lslang
post.o: In function `prepare_header':
/tmp/slrn/src/post.c:633: undefined reference to `append_to_header'
collect2: ld returned 1 exit status
make[1]: *** [/tmp/slrn/src/objs/slrn] Error 1

[snap]

Trying to build without configure options works fine, building to
following binary:

[snip]
% ./src/objs/slrn --version
slrn pre0.9.9-60
        * Note: This version is a developer preview.
S-Lang Library Version: 2.1.3
Compiled at: Nov 23 2007 09:56:10
Operating System: Linux

COMPILE TIME OPTIONS:
 Backends: +nntp -slrnpull -spool
 External programs / libs: -canlock -inews -ssl -uudeview +iconv
 Features: +decoding +emphasized_text +end_of_thread +fake_refs +gen_msgid
    -grouplens -msgid_cache +piping +rnlock +spoilers -strict_from

DEFAULTS:
 Default server object:     nntp
 Default posting mechanism: nntp
[snap]

Feel free to tell me if I'm doing something stupid. :-)

Regards, Frank

-- 
In protocol design, perfection has been reached not when there is
nothing left to add, but when there is nothing left to take away.
                                                  -- RFC 1925

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