[debian-mysql] 回复： openssl libcrypto.a and libmysqlclient.a on multiple definition of `ERR_remove_thread_state'

[刘菲]

Hi:
    Thank you very much for reply and option. Didn't exist the problem, When I used older version of mysql 5.7.22. 
    Please take a look when you are free, because our project must use mysql and openssl at the same time.


    Can we solve the problem through upate openssl to the openssl version matched yaSSL you used?


fei
Thank you very much.


发自网易邮箱大师
在2018年8月10日 18:17，Lars Tangvald<lars.tangvald at oracle.com> 写道：



On 08/09/2018 05:10 AM, 刘菲 wrote:

hi, the problem occurs  when I link to crypto Since mysqlclient update to the version"
| http://security.ubuntu.com/ubuntu/pool/main/m/mysql-5.7/ | libmysqlclient-dev_5.7.23-0ubuntu0.18.04.1_amd64.deb" |
.
The detail is below:

There is something wrong with multiple definition of `ERR_remove_thread_state' When I compile a c++ server and link openssl-1.0.2 libcrypto.a and libmysqlclient.a.Here is the error:

/usr/local/openssl-1.0.2/lib/libcrypto.a(err.o): In function `ERR_remove_thread_state':
err.c:(.text+0x1ac0): multiple definition of `ERR_remove_thread_state'
/usr/lib/x86_64-linux-gnu/libmysqlclient.a(ssl.cpp.o):(.text+0x1df0): first defined here





I try to resolve the problem by manual update crypto . but after "apt-get install libcrypto-dev", cannot update to the latest version"libcrypto++-dev_5.6.4-8_amd64.deb"(only can update to "libcrypto++-dev_5.6.1-9_amd64.deb"). 


how to resolve the problem? I have no idea, please take a look for me.


Hi,

I'll take a look and see if I can reproduce, but a couple of extra questions:
* Did this work with 5.7.22? MySQL 5.7 links yaSSL statically, and mixing this with your own link to openssl would always have a big chance of causing issues, but version updates to yaSSL or OpenSSL could have triggered the actual error.
* Have you tested the build without linking to openssl (this would mean you get all ssl functionality through libmysqlclient and yassl)?

Also note that if it is an option for you, MySQL 8.0 uses dynamic linking with OpenSSL, so this would no longer be a problem.

--
Lars

Thank you very much.





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