On 27/10/16 09:59 AM, Ondřej Surý wrote:
I can probably generate two sets of packages with versioned symbols if I have some help with that. Cheers,
Yes, but this will not help and I'm not sure it is required since OpenSSL is versioned already.
The problem is that Qt5 is using dlopen for OpenSSL. Versioned symbols are not used with dlopen as is so we are SOL. Either Qt5 needs to be linked directly against OpenSSL, or Qt5 needs to use symbols from old OpenSSL library.
And now I'm looking at Qt source, and it looks like for Qt5 it is possible to specify SHLIB version number for OpenSSL. see
qtbase/src/network/ssl/qsslsocket_openssl_symbols.cpp line 653which means it *may be* possible to have multiple OpenSSL versions installed and have Qt use only the old version. But this needs to be tested with some test application to make sure correct functions are actually called.
SHLIB_VERSION_NUMBER = 1.0.2during compilation of Qt maybe all that is required to keep Qt crypto support working in a mixed environment.
- Adam