OEM grid control 10.2.0.1 installation issue

While performing a full install of Oracle Enterprise manager 10.2.0.1, the 'product specific prerequisite checks' page shows an error for the following pacakes even if they are installed.

compat-libstdc++-296-2.96-132.7.2
libstdc++devel-3.4.3-22.1
openmotif-21-2.1.30-11

One can manually check the prerequisite pacakages for OEM using metalink note 343364.1 and safely ignore the installer warnings and continue for a successful installation.