Those guarantees are outlined in the RHEL 7 Application Compatibility Guide (ACG) and the RHEL 8 Application Compatibility Guide. Red Hat makes certain guarantees regarding application compatibility between releases.

The function and symbol names and their versions.Īs the toolchain and operating environment evolve with successive versions of Red Hat Enterprise Linux, the details of the ABI will change.

The calling conventions, which define how function arguments are passed and how return values are retrieved.

The application's data type, size, and alignment.

This interface requires tools such as compilers and linkers, as well as the produced runtime libraries and the operating system itself, to agree upon the following: The ABI describes the low-level binary interface between an application and its operating environment. When moving an application that you've compiled on Red Hat Enterprise Linux (RHEL) 7 to RHEL 8, you will likely encounter issues due to changes in the application binary interface (ABI).

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