[gtkmm] 'GLIBMM_CHECK_PERL(5.6.0)' configure error

[Martins Barinskis <m barinskis apollo lv>]

I've already successfully installed the glibmm and libsigc++ but now, 
compiling a fresh cvs copy of gtkmm after invoking ./autogen.sh, the 
configure script fails with error:

<cut>
./configure: line 8021: syntax error near unexpected token `5.6.0'
./configure: line 8021: `GLIBMM_CHECK_PERL(5.6.0)'
</cut>

According to error text, there's something to do with perl:

<cut>
perl -v

This is perl, v5.8.0 built for i486-linux
</cut>

Yes, i've got Perl 5.8.0 (I'm using Slackware 9.1, btw). Does gtkmm need 
_exactly_ perl 5.6.0, not _at least_ perl 5.6.0?  Or maybe i've glibmm 
compiled incorrectly (./autogen.sh --prefix=/usr/devgnome2 , all paths 
and ld.so.conf are updateded accordingly) ?
Thanks in advance,
Martins.