This post will be moving to here: http://blog.ipnweb.com/2008/08/installing-32-bit-oracle-software-on-64.html
Some 32-bit Oracle software is certified to run on 64-bit Linux. Others are not. Several years ago, I had to install Oracle Enterprise Manager 10g Grid Control R2 (only a 32-bit version was available at the time) on Red Hat AS 3 x86_64.
There are a few points that must first be understood regarding Oracle software on Red Hat 64-bit:
- Red Hat AS 3 guarantees that 100% of all 32-bit applications can run on their 64-bit OS (see http://www.redhat.com/magazine/009jul05/features/multilib/).
- Red Hat 64-bit is a multilib OS (both 32-bit and 64-bit libraries, down to the C library itself, are installed).
- Oracle binaries are linked during installations and upgrades on Unix-based OS'.
If a particular Oracle product is not certified and will not install under a 64-bit Red Hat OS, you can do the following:
1. Confirm that all prequisites of your Oracle product are met. Refer to the Oracle installation documentation for details.
2. Confirm that all Oracle required 32-bit versions of the prerequisite RPMs are installed.
- For example, 64-bit RPM prequisites may include:
gcc-3.2.3-53.x86_64.rpm gnome-libs-220.127.116.11.90-34.2.x86_64.rpm compat-db-4.0.14-5.1.x86_64.rpm libpng10-1.0.13-15.x86_64.rpm ORBit_0.5.17-10.4.x86_64.rpmYou may need to manually install the 32-bit versions of some RPMs such as:
glibc-devel-2.3.2-95.37.i386.rpm gcc-3.2.3-53.i386.rpm gnome-libs-18.104.22.168.90-34.2.i386.rpm3. Force the OS to link in 32-bit (i.e., essentially overriding gcc):
su - root mv /usr/bin/gcc /usr/bin/gcc.oracle.original echo "/usr/bin/gcc.oracle.original -m32 $*" > /usr/bin/gcc chmod 755 /usr/bin/gcc4. Login as the oracle user in a 32-bit shell:
su - oracle linux32 bash export LDEMULATION=elf_i3865. Install the Oracle product.
6. After installation, restore the original gcc file:
rm /usr/bin/gcc mv /usr/bin/gcc.oracle.original /usr/bin/gcc
Upgrading or patching
Make a habit of always logging in to the oracle account in a 32-bit shell (see Step 4). Also, whenever you need to upgrade or patch the Oracle software, make sure to temporarily revert to the modified gcc file (Steps 3 and 6).