Re: Statically linking

[Mihai Moldovan <ionic@xxxxxxxx>]

* On 4/12/19 9:28 PM, Paul Beerkens wrote:> [...]
> I am getting tons of error messages about undefined reference like these:
>
>     /usr/local/lib/libssh.a(pki.c.o): In function `ssh_key_clean':
>     /home/paul.beerkens/Downloads/libssh-0.8.7/src/pki.c:136: undefined
>     reference to `DSA_free'
>     /home/paul.beerkens/Downloads/libssh-0.8.7/src/pki.c:137: undefined
>     reference to `RSA_free'
>     /home/paul.beerkens/Downloads/libssh-0.8.7/src/pki.c:139: undefined
>     reference to `EC_KEY_free'
>     /usr/local/lib/libssh.a(pki.c.o): In function `ssh_signature_free':
>     /home/paul.beerkens/Downloads/libssh-0.8.7/src/pki.c:505: undefined
>     reference to `DSA_SIG_free'
>     /home/paul.beerkens/Downloads/libssh-0.8.7/src/pki.c:521: undefined
>     reference to `ECDSA_SIG_free'
>     /usr/local/lib/libssh.a(wrapper.c.o): In function `crypto_free':
>
>
>
> What do I need to do to get static linking to work?

Interesting. Note that a full build log is always a nice thing to provide
because at that point in time, we can tell you what went wrong, but not exactly why.

The underline issue is that your crypto-backend is not linked in - which seems
to be OpenSSL in your case (yes, libssh supports multiple backends, it needn't
be OpenSSL.)

The reason *why* this is not automatically pulled in correctly is because you
just linked libssh manually, leading to said problems. I think (but am not 100 %
positive) that libssh provides a libssh_static.pc file which can be used exactly
for this case and includes the dependent libraries.



Mihai

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