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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-8187) Incompatible callback function pointer casts fail to build on GCC 8
Date Thu, 10 May 2018 12:41:00 GMT

    [ https://issues.apache.org/jira/browse/QPID-8187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16470336#comment-16470336
] 

ASF GitHub Bot commented on QPID-8187:
--------------------------------------

Github user chrisrichardson77 commented on the issue:

    https://github.com/apache/qpid-cpp/pull/15
  
    -1, fails on older compiler versions.


> Incompatible callback function pointer casts fail to build on GCC 8
> -------------------------------------------------------------------
>
>                 Key: QPID-8187
>                 URL: https://issues.apache.org/jira/browse/QPID-8187
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: qpid-cpp-1.38.0
>         Environment: Gentoo x64, GCC 8.1
>            Reporter: Chris Richardson
>            Priority: Major
>             Fix For: qpid-cpp-1.39.0
>
>
> {quote}[ 22%] Building CXX object src/CMakeFiles/qpidcommon.dir/qpid/sys/epoll/EpollPoller.cpp.o
>  /home/chrisr/projects/qpid/qpid-cpp/source/src/qpid/SaslFactory.cpp: In constructor
‘qpid::CyrusSasl::CyrusSasl(const string&, const string&, const string&, const
string&, int, int, bool)’:
>  /home/chrisr/projects/qpid/qpid-cpp/source/src/qpid/SaslFactory.cpp:215:46: error: cast
between incompatible function types from ‘int (*)(void*, int, const char**, unsigned int*)’
to ‘int (*)()’ [-Werror=cast-function-type]
>  callbacks[i].proc = (CallbackProc*) &getUserFromSettings;
>  ^~~~~~~~~~~~~~~~~~~
>  /home/chrisr/projects/qpid/qpid-cpp/source/src/qpid/SaslFactory.cpp:223:50: error: cast
between incompatible function types from ‘int (*)(sasl_conn_t*, void*, int, sasl_secret_t**)’
> Unknown macro: \{aka ‘int (*)(sasl_conn*, void*, int, sasl_secret**)’}
> to ‘int (*)()’ [-Werror=cast-function-type]
>  callbacks[i].proc = (CallbackProc*) &getPasswordFromSettings;
>  ^~~~~~~~~~~~~~~~~~~~~~ 
> {quote}
> Given the constrains of the SASL library interface, the only obvious solution for this
I can think of is to add "-Wno-error=cast-function-type" to the compiler settings.



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