Installation EM13c failed with missing packages - even if higher Versions are installed

OEM 13c on Oracle Linux 7.9

Installation started in silent mode but it fails with :

Checking for gcc-4.8.2-16; Not found.  Failed

Checking for glibc-devel-2.17-55-i686; Not found.      Failed

but

rpm -qa --queryformat "%{NAME}-%{VERSION}-%{RELEASE}(%{ARCH})\n" | grep glibc

glibc-2.17-326.0.9.el7_9(x86_64)

rpm -qa --queryformat "%{NAME}-%{VERSION}-%{RELEASE}(%{ARCH})\n" | grep gcc

libgcc-4.8.5-44.0.3.el7(x86_64)

so higher versions are installed by default.

How can I proceed ?

-ignoreprereqs does not work, and -ignoresysprereqs will also ends up in this error

tia

Uwe