How to make Openssl compile to hidden (Linux)

[duanduancq]

Issue：A process adds two different versions of libssl.so。how to Let one of the libssl become a hidden interface。when I add wo different versions. then the process occur crash。 so I thinks maybe hidden One of the dynamic libraries can solve the conflict.

1. How to add "-fvisibility=hidden" to a makefile？
   I try to add the keyword，but openssl compilation error。Prompt a large number of interfaces
   not found、
   like this:
   undefined reference to X509_STORE_CTX_free' undefined reference to ERR_print_errors'
   undefined reference to OPENSSL_strlcpy' undefined reference to OPENSSL_strlcat'
   undefined reference to X509_set_serialNumber' undefined reference to X509_set_version'
   undefined reference to `X509V3_set_ctx'

   makefile:
   Makefile.zip

2. Is there any other way to resolve this conflict? A process adds two different versions of libssl.

[wwong]

Hey @duanduancq, you might want to recreate this issue on https://github.com/apache/commons-crypto. This repo was only made as a copy to experiment with lgtm.com.