Adding strongswan plugin to yocto build

[musawir8012]

I am trying to add strongswan plugin to my yocto build but i get "nothing provides strongswan-plugin-eap-identity needed by strongswan-5.5.3-r0.core2_64" error.
I am new to yocto project, can anyone provide a solution.
My local config file and layer file are as follows.
local.txt
strongswan_5.5.3.txt

[akuster]

You need to enable 'eap-identity'

In your local.conf add this: ( there is a space after the first " )

PACKAGECONFIG_append_pn-strongswan = " eap-identity"

or create strongswan_5.5.3.bbappend to contain

PACKAGECONFIG += "eap-identity"

or you may need to add
PACKAGECONFIG[eap-identity] = "--enable-eap-identity,--disable-eap-identity,,${PN}-plugin-eap-identity"

depending on the version of strongswan. Its possible the version you are using may not support that option.