make[1]: Entering directory '/tmp/portage/xfce-extra/xfce4-clipman-plugin-1.6.0/work/xfce4-clipman-plugin-1.6.0/po'
XGETTEXT_ARGS="--keyword=Q_ --from-code=UTF-8" INTLTOOL_EXTRACT="/usr/bin/intltool-extract" XGETTEXT="/usr/bin/xgettext --keyword=Q_ --from-code=UTF-8" srcdir=. /usr/bin/intltool-update --gettext-package xfce4-clipman-plugin --pot
rm -f missing notexist
srcdir=. /usr/bin/intltool-update -m
The following files contain translations and are currently not in use. Please
consider adding these to the POTFILES.in file, located in the po/ directory.

panel-plugin/common.c
panel-plugin/xfce4-clipman-history.c
panel-plugin/xfce4-clipman-settings.desktop.in

If some of these files are left out on purpose then please add them to
POTFILES.skip instead of POTFILES.in. A file 'missing' containing this list
of left out files has been written in the current directory.
Please report to http://bugzilla.xfce.org/
if [ -r missing -o -r notexist ]; then \
  exit 1; \
fi
make[1]: *** [Makefile:165: check] Error 1

Created attachment 9655 
/var/log/portage/xfce-extra:xfce4-clipman-plugin-1.6.0:20200330-064435.log

Seems like adding the mentioned files to POTFILES.in solves it:

```
diff --git a/po/POTFILES.in b/po/POTFILES.in
index c932cc2..4a50572 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -12,3 +12,6 @@ panel-plugin/collector.c
 panel-plugin/history.c
 panel-plugin/menu.c
 panel-plugin/plugin.c
+panel-plugin/common.c
+panel-plugin/xfce4-clipman-history.c
+panel-plugin/xfce4-clipman-settings.desktop.in
```

Comment 4 Git Bot 2020-04-01 18:47:16 CEST

Simon Steinbeiss referenced this bugreport in commit f793522f0067e6f37255179c8453efd00dbb967c

Add translateable files to POTFILES (Bug #16608)

https://git.xfce.org/panel-plugins/xfce4-clipman-plugin/commit?id=f793522f0067e6f37255179c8453efd00dbb967c

Comment 5 Simon Steinbeiss 2020-04-01 18:48:04 CEST

Thanks for the hint and sorry for overlooking that. I'll do a 1.6.1 release shortly to fix this (I'll give the translators a few days to catch up...)