How to point Qt to use different OpenSSL version

Marek

Hi

I have linux with Qt 4:4.6.3-4+squeeze1 and openssl 0.9.8o-4squeeze14
There is problem with communication between openssl.0.9.8 and openssl 1.0 described here:

http://stackoverflow.com/questions/8619706/running-curl-with-openssl-0-9-8-against-openssl-1-0-0-server-causes-handshake-er

http://marc.info/?l=openssl-dev&m=136760073921954&w=2

I have built openssl-1.0.2j to /home/openssl but I can't make Qt using this library. SSL is dynamically linked so ldd my_program doesn't show libssl.
I have tried

LD_LIBRARY_PATH=/home/openssl ./my_program

But it doesnt work, I can see with command:

$ lsof -p 16126|grep -i ssl
ccbox-ccd 16126 root  mem    REG       80,5   310296  8389597 /usr/lib/i686/cmov/libssl.so.0.9.8
$ lsof -p 16126|grep -i crypt
ccbox-ccd 16126 root  mem    REG       80,5   469632 29365978 /usr/lib/libgcrypt.so.11.5.3
ccbox-ccd 16126 root  mem    REG       80,5   143180 29375951 /usr/lib/libk5crypto.so.3.1
ccbox-ccd 16126 root  mem    REG       80,1    38360  1104731 /lib/i686/cmov/libcrypt-2.11.3.so
ccbox-ccd 16126 root  mem    REG       80,5  1393308  8389598 /usr/lib/i686/cmov/libcrypto.so.0.9.8

that it is always using 0.9.8 also editing /etc/ld.so.conf doesn't help

How to point Qt to use never version of openssl

Best Regards
Marek

SGaist

Hi,

Out of curiosity, why do you need to work with such an outdated system ? Qt 4.6.3 is more than 6 years old. Can't you upgrade to a more recent version ? At least 4.8.7 or better like Qt 5 (5.8 beta has been released)

Marek

Hi

You are right it is old server. One of the options is to compile some Qt version or try to upgrade Linux to wheezy.
The problem is that it is old computer and I have a few more applications running on it like dnyDNS, upgrade is risky, so I thought I can get away with only new openssl version. Simply I'm affraid that apt -get diist-upgrade may end wiith a disaster ;)
On the other hand, I'm frustrated with this problem, I thought LD_LIBRARY_PATH should work, so why isn't ?

Best Regards
Marek

SGaist

If the distribution package is built the same as the precompiled package then OpenSSL is not linked but dlopened.

Marek

which means that dlopened libraries can't be changed ?
new Qt veersion seems to be a good option.

Marek

ok after reading some more dynamic loading looks like just mapping specific library/executable and not resolving so files.
Thanks or that answer

Marek

I ended up with Qt 5.3.2 and openssl-1.0.1t
Finally works.

Best Regards
Marek