...
| Pros | Cons |
|---|---|
| different codes can use different versions of libraries | with each release of new version of the library user's code must be recompiled |
| each library is released as a separate installation (it's easy to maintain each version separately) | it's not possible to move libraries from their original location |
| we are not forced to build log LD_LIBRARY_PATH variables | |
| LD_LIBRARY_PATH has lower precedence than rpath | |
| It is still possible to use LD_PRELOAD to enforce given library to be used (e.g. debugging purposes) |
RPATH - slightly different layout
...
of directories
In case of rpath based compilation we don't need centrally located lib directory at all. All files (paths) will be provided by pc files for each and every module.
| Code Block |
|---|
swimas
|-- etc
| `-- modulefiles
| `-- xmllib
| |-- 4.0-GCC-6.1.0
| `-- 4.0-intel-17.0.4
`-- extra
`-- xmllib
|-- 4.0-GCC-4.8.5
| |-- include
| | |-- f90_file_reader.mod
| | |-- mod_f90_kind.mod
| | |-- string_manipulation_tools.mod
| | |-- xml2eg_mdl.mod
| | |-- xml_file_reader.mod
| | |-- xmllib_parser.mod
| | |-- xmllib_pathquery.mod
| | `-- xmllib_types.mod
| `-- lib
| |-- libxmllib.a
| `-- pkgconfig
| `-- xmllib.pc
`-- 4.0-intel-17.0.4
|-- include
| |-- f90_file_reader.mod
| |-- mod_f90_kind.mod
| |-- string_manipulation_tools.mod
| |-- xml2eg_mdl.mod
| |-- xml_file_reader.mod
| |-- xmllib_parser.mod
| |-- xmllib_pathquery.mod
| `-- xmllib_types.mod
`-- lib
|-- libxmllib.a
`-- pkgconfig
`-- xmllib.pc
|