Hello,

/usr/share/doc/libltdl-dev/copyright tells about GPL.

But looking at the source of libtool, the libltdl/ directory contains
COPYING.LIB (LGPL), and licensecheck confirms source files as announcing
LGPL.

So /usr/share/doc/libltdl-dev/copyright should tell about LGPL, not GPL.

This is especially important for a BSD program which makes use of
libltdl to allow loading of plugins of any kind of licence. If libltdl
was GPL, the plugin-capable BSD program, once linked against libltdl,
would become GPL.

Samuel

I stumbled on the same issue.  Note that this also applies to the
libltdl library package.

In addition, I'd like to mention that the libtool info[1] also states
that libltdl is LGPL.  It doesn't mention a version though.

 [1] https://www.gnu.org/software/libtool/manual/html_node/Using-libltdl.html

Hope this helps,