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- Perl 5 DynaLoader
-
- See DynaLoader.pm for detailed specification.
-
- This module is very similar to the other Perl 5 modules except that
- Configure selects which dl_*.xs file to use.
-
- After Configure has been run the Makefile.PL will generate a Makefile
- which will run xsubpp on a specific dl_*.xs file and write the output
- to DynaLoader.c
-
- After that the processing is the same as any other module.
-
- Note that, to be effective, the DynaLoader module must be _statically_
- linked into perl! Configure should arrange this.
-
- This interface is based on the work and comments of (in no particular
- order): Larry Wall, Robert Sanders, Dean Roehrich, Jeff Okamoto, Anno
- Siegel, Thomas Neumann, Paul Marquess, Charles Bailey and others.
-
- The dl_*.xs files should either be named after the dynamic linking
- operating system interface used if that interface is available on more
- than one type of system, e.g.:
- dlopen for dlopen()/dlsym() type functions (SunOS, BSD)
- dld for the GNU dld library functions (linux, ?)
- or else the osname, e.g., hpux, next, vms etc.
-
- Both are determined by Configure and so only those specific names that
- Configure knows/uses will work.
-
- If porting the DynaLoader to a platform that has a core dynamic linking
- interface similar to an existing generic type, e.g., dlopen or dld,
- please try to port the corresponding dl_*.xs file (using #ifdef's if
- required).
-
- Otherwise, or if that proves too messy, create a new dl_*.xs file named
- after your osname. Configure will give preference to a dl_$osname.xs
- file if one exists.
-
- The file dl_dlopen.xs is a reference implementation by Paul Marquess
- which is a good place to start if porting from scratch. For more complex
- platforms take a look at dl_dld.xs. The dlutils.c file holds some
- common definitions that are #included into the dl_*.xs files.
-
- After the initial implementation of a new DynaLoader dl_*.xs file you
- may need to edit or create ext/MODULE/MODULE.bs files (library bootstrap
- files) to reflect the needs of your platform and linking software.
-
- Refer to DynaLoader.pm, lib/ExtUtils/MakeMaker.pm and any existing
- ext/MODULE/MODULE.bs files for more information.
-
- Tim Bunce.
- August 1994
-