[gentoo-user]

Karl:
> Thelma:
> > I have app-office/glabels installed with (barcode -eds)
> > but the style menus is not showing "GNU Barcode
> >
> > Is it a bug?
>
> app-text/barcode doesn't provide the lib needed, see below.

Instead of barcode you could try out zint:

git clone https://git.code.sf.net/p/zint/code zint-code
cd zint-code
git co ade31c41fba14b942cca30a4a605e48517613d25
mkdir build
cd build
cmake ..
make
make install

Note:
 Since ZBarcode_Render was removed in
 commit f9d969cdd66984906719c87ed486909a673decec
 you have to check out an earlier commit e.g. the one
 I used above.

 possible also as root
ldconfig

 And then reinstalling glabels

emerge -aqv app-office/glabels

///

There is also the iec16022 package,

wget https://archive.kernel.org/debian-archive/debian/pool/main/i/iec16022/iec16022_0.2.4.orig.tar.gz
tar zxf iec16022_0.2.4.orig.tar.gz
cd iec16022_0.2.4
./configure
make
make install

and then reemerge glabels.

Regards,
/Karl Hammar