Libguile build error (rpl_...) on Debian Squeeze

[Roland Orre]

I'm trying to build guile-2.0.9 on a Debian squeeze system, but get the error
./.libs/libguile-2.0.so: undefined reference to `rpl_regfree'
./.libs/libguile-2.0.so: undefined reference to `rpl_regcomp'
./.libs/libguile-2.0.so: undefined reference to `rpl_regerror'
./.libs/libguile-2.0.so: undefined reference to `rpl_regexec'

It builds fine on my Debian Wheezy systems. I'm using the same configparams
GUILEROOT=`pwd`
./configure --with-threads --with-readline \
 --prefix=${GUILEROOT}                  \
 --exec-prefix=${GUILEROOT}             \
 --bindir=${GUILEROOT}/bin              \
 --datadir=${GUILEROOT}                 \

On the same Wheezy system I could build guile-1.8.8, guile-2.0.0 fine as well
but on the Squeeze system guile-2.0.0 fails completely.

Anybody having a hint? I could not find any clue when searching (google and ddg)
(and as these Squeeze systems are servers, I do not want to clutter them with
all kinds of things)