OTClient - Linux Debian 9 - Compile ERROR (RSA)

[Snavy]

[UPDATED]
I have been trying to Compile OTC on Debian 9 (OpenSSL 1.1.0) but im facing the following

error; crypt.cpp:358:52: error: invalid use of incomplete type ‘RSA {aka struct rsa_st}’ BN_mod_inverse(m_rsa->iqmp, m_rsa->q, m_rsa->p, ctx);

I tried downgrading OpenSSL to 1.0.1 but that didn't do anything about the issue.
After Doing some more research i found that, according to the OpenSSL WIKI, there are 2 things i need to do:

Access to deprecated functions/macros has been removed by default. To enable access you must do two things.
1) Build OpenSSL with deprecation support (pass "enable-deprecated" as an argument to config)
2) Applications must define "OPENSSL_USE_DEPRECATED" before including OpenSSL header files

but i am not sure how to accomplish this.

 

[gugu15]

Try to find another version of OpenSSL lib

 

[Snavy]

Downgraded openssl from 1.1.0 to 1.0.1 still same error..

 

[gugu15]

Look the OpenSSL's documentation and make changes on the otc's source