PL/Proxy compiling error in Postgres 9.4 Development Server on Ubuntu 14.10

Dear Postgres team
gssadmin@dbtest:~/plproxy-2.4$ sudo make PG_CONFIG=pg_config

Error when installing PL/Proxy in Postgres 9.4 Development Server on Ubuntu
14.10

Detailed error is attached
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*Iyappan,*
*Global Software Solutions (TVL) Pvt. Ltd.,*
*+91 97152 30226*