From: fonta72@... (Angelo)
Date: 2007-03-04T23:10:05+09:00
Subject: Re: Installing .gem in an embedded system

Jan Svitok ha scritto:

> On 3/1/07, Angelo <fonta72@gmail.com> wrote:
> > Hi,
> > I am trying to install sqlite3-ruby-1.1.0.gem on an embedded system (with
> > ARM cpu).
> >
> > From the target I use the command
> > gem install sqlite3-ruby-1.1.0.gem
> > but the installation fail, saying that sqlite3.h cannot be found.
> >
> > This is the mkmf.log:
> >
> > --------- mkmf.log -----------
> >
> > have_header: checking for sqlite3.h... -------------------- no
> >
> > "arm-linux-gcc -E -I. -I/usr/local/lib/ruby/1.8/arm-linux -I. -I/include/
> > -I/usr
> > checked program was:
> > /* begin */
> > 1: #include <sqlite3.h>
> > /* end */
> >
> > --------------------
> >
> >
> > It seems that the installation process wants a gcc compiler but on my
> > target I have not a toolchain.
> >
> > How can I install sqlite3-ruby gem on my target without compiling?

> extract the sources, compile the extension where you have the
> toolchain, and then repack with binary extension (inspire yourself
> with -win32 gems -- typically win32 has no toolchain installed as
> well)

> I'll leave the details up to you ;-)

I am not able to build a non-empty .gem, so I worked with .tar.gz package.
I have crosscompiled the extension with the toolchain, I installed the
package in /tmp/sqlite3-ruby (with the command: ruby setup.rb install
--prefix=/tmp/sqlite3-ruby) and I copied /tmp/sqlite3-ruby on the target.
Then I had to build an empty .gem, because sqlite3-ruby didn't appear in
the list of installed .gem on the target.
After the installation of the empty .gem, the package worked properly.

Now I should learn how to build a non-empty .gem! ;-)

Thanks you for your help!

Angelo.

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