install_driver(Oracle) failed: Can't load `.../DBD/Oracle/Oracle.so' for module DBD::Oracle

Description



This section is from the "Practical mod_perl " book, by Stas Bekman and Eric Cholet . Also available from Amazon: Practical mod_perl



Here's an example of the full error report that you might see:



    install_driver(Oracle) failed: Can't load





    '/usr/lib/perl5/site_perl/5.6.1/i386-linux/auto/DBD/Oracle/Oracle.so'





    for module DBD::Oracle:





    libclntsh.so.8.0: cannot open shared object file:





    No such file or directory at





    /usr/lib/perl5/5.6.1/i386-linux/DynaLoader.pm line 169.





    at (eval 27) line 3





    Perhaps a required shared





    library or dll isn't installed where expected at





    /usr/local/apache/perl/tmp.pl line 11







     



On BSD-style filesystems, LD_LIBRARY_PATH is not searched for setuid programs. If Apache is a setuid executable, you might receive this error. Therefore, the first solution is to explicitly load the library from the system-wide ldconfig configuration file:



    panic# echo $ORACLE_HOME/lib >> /etc/ld.so.conf





    panic# ldconfig





    (使用该方法我的问题就解决了)



Another solution to this problem is to modify the Makefile file (which is created when you run perl Makefile.PL ) as follows:



    Search for the line LD_RUN_PATH=



    Replace it with LD_RUN_PATH=my_oracle_home/lib



where my_oracle_home is, of course, the home path to your Oracle installation. In particular, the file libclntsh.so.8.0 should exist in the lib subdirectory.



Then just type make install , and all should go well.



Note that setting LD_RUN_PATH has the effect of hardcoding the path to my_oracle_home/lib in the file Oracle.so , which is generated by DBD::Oracle . This is an efficiency mechanism, so that at runtime it doesn't have to search through LD_LIBRARY_PATH or the
default directories used by ld .



For more information, see the ld manpage and the essay on LD_LIBRARY_PATH at http://www.visi.com/~barr/ldpath.html .