Build criu 32-bit source code

[indusai99]

Hi, I want to run criu in 32-bit mode . As the 32-bit libraries are not available, I want to generate them from criu source build. I have cloned criu package and installed all required dependency libraries. Using make command, I have build criu. I could see libcriu.so is generated- which is of 64-bit But my requirement is building 32-bit criu source and generating 32-bit shared libs. From criu webiste, (https://criu.org/Installation#Distribution_Packages:~:text=For%20building%20with%2032bit%20tasks%20C/R%20support%20you%20will%20need%20libc6%2Ddev%2Di386%2C%20gcc%2Dmultilib%20instead%20of%20gcc.) , I could see criu supports 32-bit build if we have required libc6-dev-i386, gcc-multilib.
I have them in my machine. Apart from this, there is no info about 32-bit build process/command Can anyone guide me on how to do criu 32-bit build ?

Machine Details: Fedora based Linux kernel version - 5.12

Please let me know if any other input is required.

[indusai99]

x32 - specially compiled binaries to run on x86_64 machine with CONFIG_X86_X32 config option set. I could see something like this in https://criu.org/32bit_tasks_C/R Do we need to enable this CONFIG_X86_X32in kernel config or criu config?

[avagin]

But my requirement is building 32-bit criu source and generating 32-bit shared libs.

We don't support this configuration. But 64-bit criu on amd64 can C/R 32-bit processes.