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(libtool.info)Information sources


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Information sources
-------------------

   Once it is clear that a new port is necessary, you'll generally need
the following information:

canonical system name
     You need the output of `config.guess' for this system, so that you
     can make changes to the libtool configuration process without
     affecting other systems.

man pages for `ld' and `cc'
     These generally describe what flags are used to generate PIC, to
     create shared libraries, and to link against only static
     libraries.  You may need to follow some cross references to find
     the information that is required.

man pages for `ld.so', `rtld', or equivalent
     These are a valuable resource for understanding how shared
     libraries are loaded on the system.

man page for `ldconfig', or equivalent
     This page usually describes how to install shared libraries.

output from `ls -l /lib /usr/lib'
     This shows the naming convention for shared libraries on the
     system, including which names should be symbolic links.

any additional documentation
     Some systems have special documentation on how to build and install
     shared libraries.

   If you know how to program the Bourne shell, then you can complete
the port yourself; otherwise, you'll have to find somebody with the
relevant skills who will do the work.  People on the libtool mailing
list are usually willing to volunteer to help you with new ports, so
you can send the information to them.

   To do the port yourself, you'll definitely need to modify the
`libtool.m4' macros in order to make platform-specific changes to the
configuration process.  You should search that file for the `PORTME'
keyword, which will give you some hints on what you'll need to change.
In general, all that is involved is modifying the appropriate
configuration variables (Note: libtool script contents).

   Your best bet is to find an already-supported system that is similar
to yours, and make your changes based on that.  In some cases, however,
your system will differ significantly from every other supported system,
and it may be necessary to add new configuration variables, and modify
the `ltmain.in' script accordingly.  Be sure to write to the mailing
list before you make changes to `ltmain.in', since they may have advice
on the most effective way of accomplishing what you want.


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