From: Jason Roelofs <jameskilton@...>
Date: 2008-03-17T22:43:50+09:00
Subject: Re: How to make an unix library from some ruby code?

Pavel,

perlembed is about embedding Perl into your programs, not libraries
and even then it's about building a C / C++ program that can call out
perl functions, like for using Perl as a scripting language. If you
want a library that's linked to by other programs, it has to be
written in a language that can be compiled into a static library.
Thus, you're stuck with C / C++.

What you want, you can't do, whether in Ruby, Perl, Lua, etc.

You can fake it by:

Creating a C library with a single function that starts up the Ruby vm
and executes installed Ruby scripts or Ruby code compiled into the
library as a giant string.
Link to that library, link to Ruby, and then call the function to
start the whole process.

Please don't do this. If it needs to be a Unix library, just write it
in C / C++.

Jason

On Mon, Mar 17, 2008 at 9:24 AM, Pavel Smerk <smerk@fi.muni.cz> wrote:
> Marc Heiler wrote:
>  >> I need to have some functionality "packaged" as an unix library
>  > Just write the ruby code or use what is already available.
>  > Ruby can do the same what the unix tools can. Its just a question of
>  > how much work to invest :-)
>
>  Unfortunately, I definitely need a library which could be easily used in
>  C programs (or elsewhere). A ruby script does not fit my needs.
>
>  Because it is possible to embed Perl interpreter to a C program (man
>  perlembed, http://perldoc.perl.org/perlembed.html), I believe there
>  could be something similar in Ruby.
>
>  Thanks, P.
>
>