This directory contains the serialized ABI definitions for a typical build of the lttng-ust librairies. This information is extracted using libabigail (https://sourceware.org/libabigail/). The artefacts used to generate these were built with CFLAGS="-O0 -ggdb" and all optional configure switches enabled. You can compare the serialized ABI with a shared object to check for breaking changes. For example, here we compare an in-tree built version of liblttng-ust.so with the serialized ABI of stable-2.13 : abidiff \ extras/abi/2.13/x86_64-pc-linux-gnu/liblttng-ust.so.1.xml \ src/lib/lttng-ust/.libs/liblttng-ust.so