sqlplus errored out with Segmentation fault (core dumped)

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 Segmentation fault (core dumped) when oracle client 32bit and 64bit Installed on same server

Cause: This is an os compiler related issue on RHEL 

Solution1: Try relinking 

as oracle user

go to $ORACLE_HOME/bin

./relink all

Solution2: Create an emptry directory 

if Solution 1 does not work 

1.  Login as root user.
2. Create an empty file /etc/sysconfig/64bit_strstr_via_64bit_strstr_sse2_unaligned