It is best to start from a blank template such as the one that follows rather than to start from a similar recipe and modify it, as the result will be cleaner and contain only the strictly
required instructions.

A good starting base for a minimal recipe addition is:

SUMMARY = "The package description for the package management 
   system" 
 
LICENSE = "The package's licenses typically from 
   meta/files/common-licenses/" 
LIC_FILES_CHKSUM = "License checksum used to track open license 
   changes" 
DEPENDS = "Package list of build time dependencies" 
 
SRC_URI = "Local or remote file or repository to fetch" 
SRC_URI[md5sum] = "md5 checksums for all remote fetched files (not 
   for repositories)" 
SRC_URI[sha256sum] = "sha256 checksum for all remote fetched files 
   (not for repositories)" 
 
S = "Location of the source in the working directory, by default 
   ${WORKDIR}/${PN}-${PV}." 
 
inherit <class needed for some functionality> 
 
# Task overrides, like do_configure, do_compile and do_install, or 
   nothing. 
 
# Package splitting (if needed). 
 
# Machine selection variables (if needed).