2.8.2. Prefixing the Library Major soname with the Software Collection Name

When using libraries included in the Software Collection, always remember that a library with the same major soname can already be available on the system as a part of the base system installation. It is thus important not to forget to use the scl enable command when building an application against a library included in the Software Collection. Failing to do so may result in the application being executed in an incorrect environment, linked against the incorrect system version of the library.

Warning

Keep in mind that executing your application in an incorrect environment (for example in the system environment instead of the Software Collection environment) as well as linking your application against an incorrect library can lead to undesired behavior of your application, including unexpected termination and data loss.
To ensure that your application is not linked against an incorrect library even if the LD_LIBRARY_PATH environment variable has not been set properly, change the major soname of the library included in the Software Collection. The recommended way to change the major soname is to prefix the major soname version number with the Software Collection name.
Below is an example of the MySQL client library with the mysql55- prefix:
$ rpm -ql mysql55-mysql-libs | grep 'lib.*so'
/usr/lib64/mysql/libmysqlclient.so.mysql55-18
/usr/lib64/mysql/libmysqlclient.so.mysql55-18.0.0
On the same system, the system version of the MySQL client library is listed below:
$ rpm -ql mysql-libs | grep 'lib.*so'
/usr/lib64/mysql/libmysqlclient.so.18
/usr/lib64/mysql/libmysqlclient.so.18.0.0