Hi,

Currently, I install SuSe 10.2 in my notebook with 64-bit system. When I install the system, I also select 32-bit runtime to be installed.
After the system installed, I can compile my application with C++ by default which is 64-bit binary.
When I try to compile with an option - "-m32", during link, the 32-bit library can not be found.

Question: How can I make my 64-bit system to run 32-bit application?

Thank you.

Answer: Install the 32-bit version of the library or tell the linker where to find the 32-bit version of the library.

Look at your filesytem. There should be a */lib directory for 32-bit libraries and a */lib64 directory for 64-bit libraries. If not, then you probably don't have a multilib system and can only use the 64-bit ABI.

SuSE does have a multilib system. Look in the install disk under /docu/ for the SuSE documentation. One of the documents covers building 32 bit apps when running the 64 bit distro. Some of the 32 bit versions are also available as rpms and some packages such as firefox will install the 32 bit version by default. This is done for firefox to allow running 32 bit plugins. For other packages, there simply isn't a 64 bit version to install.

Thank you for your information.

There are two set libraries - lib and lib64 as you described in the mail.
But, under lib, I can not find libstdc++.so.
Under lib64, I do see that there is a directory-32 under /usr/lib64/gcc/x86_64-suse-linux/4.1.2. In oder to have libstdc++.so to install under 32, do I need to get 32-bit gcc software? Where I can get 32-bit software?

Thank you.

There are 303 packages in the x86_64 directory on the SuSE install disk. There are 46 packages in the i586 directory. There are 406 packages in the noarch directory. This is the x86_64 install disk that I am refering to. Check if the package exists before trying to compile from source.

These are the 32 bit libstd++ packages on the installation disk:
libstdc++41-32bit-4.1.2_20061115-5.x86_64.rpm
libstdc++41-devel-32bit-4.1.2_20061115-5.x86_64.rpm

There may also be earlier versions in packages beginning with "compat-".

What 32 bit program are you trying to install?
Or is this a program you wrote yourself?

By the way, the SuSE documentationn I was referring to earlier is in the docu/en/opensuse-reference_en.pdf file.
Chapter 12: 32-Bit and 64-Bit Applications in a 64-Bit System Environment

It covers building 32 bit applications.

Thank you for your response.

For 32-bit environment, I will use for my own developed application.