.. as a specific example, hostmot2.h defines hostmot2_t. Between 2.7
and master, we added the config.pktuarts and pktuart fields to it. This
is technically API compatible, since the fields were only added; the
meaning of existing fields is not changed. However, it is ABI
incompatible since the size and layout of the structure changed. We've
never tried to be ABI compatible in this way.
Between 2.6 and 2.7, we made an incompatible API change, removing one
API and adding two to replace it:
-int hm2_sserial_check_errors(hostmot2_t *hm2, hm2_sserial_instance_t *inst);
+int hm2_sserial_check_local_errors(hostmot2_t *hm2, hm2_sserial_instance_t
*inst);
+int hm2_sserial_check_remote_errors(hostmot2_t *hm2, hm2_sserial_instance_t
*inst);
If this had been public API, then we would have needed to provide the
old API too, during the interval that the old API was deprecated.
Jeff
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