Adrelink fails with ld cannot find lclntsh

1.Patch application was failing with the below error in Non production instance

/usr/bin/ld: cannot find -lclntsh

2.We observed that the issue was due to libclntsh soft link which was incorrect, As you can see below the soft link was pointing to the PROD

3. Run the script  $ORACLE_HOME/bin/genclntsh which will fix the soft link issue

[appstest@test001]$ sh genclntsh

[appstest@test001]$

[appstest@test001]$ pwd

/ebs/oracle/TEST/apps/tech_st/10.1.2/bin

4.Check the soft link  of libclntsh  again which will be corrected by the script we have run in 3^rd script as seen in below screenshot.

5.Run the relink again which will be successfully now