Error while rebuilding Forms and Reports during the upgradation of 12.0.6 to 12.1.1

while upgrading the oracle Application from 12.0.6 to 12.1.1you may see the following errors during a relink of the 10.1.2 Oracle Home:

/usr/lib/libXtst.so.6: undefined reference to `__stack_chk_fail@GLIBC_2.4'
/usr/lib/libXtst.so.6: undefined reference to `__fprintf_chk@GLIBC_2.3.4'
/usr/lib/libXtst.so.6: undefined reference to `__sprintf_chk@GLIBC_2.3.4'

Rebuild Forms and Reports executables
cd $ORACLE_HOME/forms/lib32 Note: if this directory does not exist: cd $ORACLE_HOME/forms/lib $ make -f ins_forms.mk install
cd $ORACLE_HOME/reports/lib32 Note: if this directory does not exist: cd $ORACLE_HOME/reports/lib $ make -f ins_reports.mk install
Link to Motif library in Oracle Application Server 10.1.2 (on OEL 5 and RHEL 5 only)
Perform the following command (as root on your system) to update a required link to a Motif library prior to relinking or patching the 10.1.2 Application Server Oracle Home:

# unlink /usr/lib/libXtst.so.6# ln -s /usr/X11R6/lib/libXtst.so.6.1 /usr/lib/libXtst.so.6
Since the ldconfig command overrides this link, the above link command (ln) will have to be re-issued after running the ldconfig command.