Сертифицированная платформа - это OS на которой инженеры делают очень много тестов и вносят потом соответствующие изменения в код ASE специфичнные для данной OS. Redhat9 как и Redhat8 никогда не были сертифицировнны ни под ASE15 ни под ASE12.5, ни под ASE12. Есть конечно workaround (ниже) как установить ASE на RH9, но никто не гарантирует ее стабильную работу в дальнейшем

http://www.peppler.org/FAQ/linux.html
Running ASE 12.5.x on RH 9

ASE 12.5.x fails to run on RH 9 because of a fix added to glibc. This fix causes the dynamic linker to revert to the i386 version of glibc in situations where the binary being run accesses _errno directly. The fix was done to ensure correct behavior for multi-threaded applications. Unfortunately ASE isn't compatible with this fix. A solution to this problem is provided below:

We now have a solution (courtesy of Jakub Jelinek from RedHat) rather than just a workaround:

From the Rawhide branch:

http://ftp.redhat.com/pub/redhat/linux/rawhide/i386/RedHat/RPMS
glibc-2.3.2-71.i686.rpm
glibc-common-2.3.2-71.i386.rpm
glibc-devel-2.3.2-71.i386.rpm
tzdata-2003a-2.noarch.rpm

Note - as these files are no longer available from Red Hat I have made them available at http://www.peppler.org/downloads/RPM/redhat-9.0/.

1) ASE needs to use /lib/i686/libpthread.so.0 to run properly. The RedHat patch makes us load /lib/libpthread.so.0 instead. On a default installation of AS 2.1, the library /lib/tls/libpthread.so.0 was not installed.

2) Only glibc < 2.3.2-31 should load /lib/libpthread.so.0 if the warning is printed.

3) Later glibc 2.3.2-31 and higher, will correctly load the /lib/i686/libpthread.so.0.

Thanks to everyone that was involved to resolve this issue!