I'm still really new at this - a few questions:
-----Original Message-----
From: openssl-users <openssl-users-boun...@openssl.org> On Behalf Of Viktor
Dukhovni
Sent: Wednesday, July 17, 2019 12:42 PM
To: openssl-users@openssl.org
Subject: Re: Errors building 1.1.1 on RHEL 7
On a system with OpenSSL 1.0.2 or OpenSSL 1.1.0 in /usr/lib (on the default
search path), and especially when you're linking with other libraries that in
turn were linked against the OpenSSL version in /usr/lib, using OpenSSL
1.1.1 in your application requires care...
Specifically:
1. Choose some location that is not on the default library search path
to install the 1.1.1 custom libraries. I use /opt/openssl/1.1/lib
> How do I specify that? A config parameter (and which one)?
2. Configure your OpenSSL build to use the corresponding "rpath":
-Wl,-rpath,/opt/openssl/1.1/lib
> Again, how do I specify that?
3. Add a custom target platform to the "targets" array in
Configurations/<some-file>.conf. This can inherit from
the configuration you're using now, but add a setting
for "shlib_variant" as described in Configurations/README
...
inherit_from => "<your platform>",
shlib_variant => "-opt",
...
> I can find that...
4. Build and install OpenSSL 1.1.1c with "--prefix=/opt/openssl/1.1"
or similar for the custom target platorm. Make sure that the
SONAME and symbol versions contain the "-opt" or "_OPT" tweak.
> Not familiar with that tweak.
5. Link your application against this library:
-I/opt/openssl/1.1/include -L/opt/openssl/1.1/lib
-Wl,-rpath,/opt/openssl/1.1/lib
> Can do.
6. Check with "readelf -d" that the application records the expected SONAME
for the OpenSSL library (libcrypto and/or libssl) dependencies.
> Can do.
You can now have your code using OpenSSL 1.1.1 and other libraries you use,
using whichever OpenSSL they were compiled with. However, you cannot pass
OpenSSL objects you create into such libraries, their use of OpenSSL must be
self-contained.
--
Viktor.
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