how to disable shared libs with pkgsrc libtool

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello,
I have a package (an update of syslog-ng to 3.3.7) which has a
library inclued. The build system of this library uses libtool, and
is configured with shared libraries disabled:
toccata:/usr/tmp/sysutils/syslog-ng/work/syslog-ng-3.3.7/lib/ivykis>./libtool 
--features
host: i386--netbsdelf
disable shared libraries
enable static libraries

But pkgsrc overwrite this libtool with the pkgsrc one, which has shared libs
enabled. This leads to a binary linked against a shared library, which is not
installed (and I'm not sure we want to install it).
How can I disable binding this shared library ?


-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--