[yocto] Export bitbake variables between recipes

[Fabrice Coulon]

Hi,

Is it possible to export one bitbake variable from one recipe and make it
available from inside another recipe? For example: we want to export 
from our
systemd_%.bbappend where the systemctl command has been installed, in 
order to,
from another recipe depending on systemd, refer to the absolute path where
systemctl was installed. Any ideas or suggestions on how to do that?

thanks,
Regards,

/Fabrice