Undefined Reference to "bn_get_words()" and "bn_get_top()".

[Tomas Mraz]

On Tue, 2022-01-11 at 10:15 +0000, Kumar Mishra, Sanjeev wrote:
> Hi,
> I am getting following linking Error for APIs "bn_get_words()" and
> "bn_get_top()" while compiling with OpenSSL 3.0. Although crypto/bn.h
> is included in file.
> Please help to resolve it.
> Regards,
> Sanjeev

These symbols are internal and not exported from the shared library. 

You would have to link statically to be able to use them. Of course
that is not recommended exactly because the symbols are internal and
thus can disappear or arbitrarily change meaning within any release.

-- 
Tomáš Mráz, OpenSSL