31.01.2017, 10:21, "Nikos Mavrogiannopoulos":
> On Fri, 2017-01-27 at 10:54 -0600, Benjamin Kaduk via openssl-dev
> wrote:
>>  [moving from github to -dev]
>>
>>  On 01/27/2017 07:36 AM, mattcaswell wrote:
>>  > 1.0.2 is the software version.
>>  > The numbers on the end of lbssl.so.1.0.0 refer to the ABI version -
>>  > which is different. Software version 1.0.2 is a drop in replacement
>>  > for 1.0.1, which is a drop in replacement for 1.0.0 - hence they
>>  > all have the same ABI version.
>>  >
>>
>>  There was some discussion about 1.0.1 being EoL on a FreeBSD list
>>  [0], and whether it would make sense to move to 1.0.2 on their stable
>>  branch, which led to someone making the claim that 1.0.2 has removed
>>  4 symbols compared to 1.0.1, and thus is not strictly ABI compatible,
>>  linking to https://abi-laboratory.pro/tracker/timeline/openssl/ .  If
>>  I start semi-randomly clicking around, I can find a page [1] that
>>  seems to claim the missing symbols are:
>>  ASN1_STRING_clear_free()
>>  ENGINE_load_rsax()
>>  SRP_user_pwd_free()
>>  SRP_VBASE_get1_by_user()
>
> ...
>>  One (naive?) idea for a home-grown solution would be to come up with
>>  a scheme to serialize the public ABI to a file in the repo, maybe
>>  regenerated as part of 'make test', and ensure that that file is
>>  append-only, at least between releases.  But I don't know if the
>>  state of the art is more advanced than that -- are there better
>>  options?
>
> The abi-dumper and abi-compliance-checker tools can be used for that
> purpose. In fact they are the back-end tools used by the abi-laboratory
> you quote above.

Hello,

These pages on OpenSSL wiki may be helpful:

https://wiki.openssl.org/index.php/Binary_Compatibility
https://wiki.openssl.org/index.php/ABI_Tracker

Thank you.
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