Building recode

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

I'm having problems building converters/recode. Building with 
PKGSRC_COMPILER=clang gives me autohell problems mentioned elsewhere, but 
building with gcc gives me

Making all in src
/bin/sh ../libtool --mode=compile gcc -DLIBDIR=\"/usr/pkg/lib\" -DHAVE_CONFIG_H 
-I.. -I. -I../lib -I../libiconv  -no-cpp-precomp -isystem /usr/include 
-I/usr/pkg/include -I/usr/include  -pipe -O2 -I/usr/pkg/include -I/usr/include 
-c argmatch.c
libtool: compile: unable to infer tagged configuration
libtool: compile: specify a tag with `--tag'

Any libtool experts around?