OpenSSL BIGNUM lib

[kuratkull]

Hello,
I am using the OpenSSL BIGNUM lib for my program. I got rid of all the compiler errors/warnings about it's usage, and when I thought it would compile:

rabler.c:(.text+0x1a8): undefined reference to `BN_CTX_new'
rabler.c:(.text+0x1cc): undefined reference to `BN_mod_exp'

The file is there, and the compiler knows where it is.
I guess I have to use some special GCC flags(like with math.h "-lm")?

Tried to Google, but didn't succeed.

Thanks in advance.

[weaknessforcats]

A compiler undefined reference usually means that you are missing a header file or that a preprocessor symbol has not been defined.

[kuratkull]

I said I had the file, and the compiler detected it. It knows where it is and how to access it.
Proof: It got the "BIGNUM" from the lib