Mac OS X El Capitan and OpenSSL Headers

Datetime:2016-08-22 21:44:52         Topic: OpenSSL          Share        Original >>
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Apple stopped including the OpenSSL development headers on recent versions of OSX, trying to get people to move away from the old 0.9.8 version that’s been deprecated for a very long time. Making people stop using this shared library is a Good Thing to be sure but you may come across older software that you want to build for yourself.

If you try to compile a newer version of OpenSSL you will likely find that programs will fail to build against more recent versions because a lot of data structures have been hidden. You may see errors such as:

error: variable has incomplete type 'EVP_PKEY' (aka 'struct evp_pkey_st')

        EVP_PKEY pk;


/usr/local/include/openssl/ossl_typ.h:92:16: note: forward declaration of 'struct evp_pkey_st'

typedef struct evp_pkey_st EVP_PKEY;

If you want to get such code to compile there’s a quick and easy solution! OSX still ships with the 0.9.8 library, you just need to provide the headers. Remove any newer versions of OpenSSL, grab the 0.9.8 sources , and copy over the headers:

$ sudo cp -r include/openssl /usr/local/include/

And then you’re all set.


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