Hi:

I had a similar error. The error went away when I installed
libsqlite3-dev on Linux (Ubuntu).via Synaptic. 

Hope this helps. 

Good day.

On Wed, 2009-06-10 at 13:47 +0900, Francisco Colina wrote:
> Hello I'm trying to install gem sqlite 3 and I'm getting this error:
> 
> 
> 
> root@kundera-laptop:/usr/local/lib/ruby/gems# gem install sqlite3-ruby
> --version 1.2.2
> Building native extensions.  This could take a while...
> ERROR:  Error installing sqlite3-ruby:
>   ERROR: Failed to build gem native extension.
> 
> /usr/local/bin/ruby extconf.rb
> checking for fdatasync() in -lrt... yes
> checking for sqlite3.h... no
> *** extconf.rb failed ***
> Could not create Makefile due to some reason, probably lack of
> necessary libraries and/or headers.  Check the mkmf.log file for more
> details.  You may need configuration options.
> 
> Provided configuration options:
>   --with-opt-dir
>   --without-opt-dir
>   --with-opt-include
>   --without-opt-include=${opt-dir}/include
>   --with-opt-lib
>   --without-opt-lib=${opt-dir}/lib
>   --with-make-prog
>   --without-make-prog
>   --srcdir=.
>   --curdir
>   --ruby=/usr/local/bin/ruby
>   --with-sqlite3-dir
>   --without-sqlite3-dir
>   --with-sqlite3-include
>   --without-sqlite3-include=${sqlite3-dir}/include
>   --with-sqlite3-lib
>   --without-sqlite3-lib=${sqlite3-dir}/lib
>   --with-rtlib
>   --without-rtlib
> 
> 
> Gem files will remain installed in
> /usr/local/lib/ruby/gems/1.9.1/gems/sqlite3-ruby-1.2.2 for inspection.
> Results logged to
> /usr/local/lib/ruby/gems/1.9.1/gems/sqlite3-ruby-1.2.2/ext/sqlite3_api/gem_make.out
> 
> The make out file was not helpful at all so if anyone knows what is the
> problem , what do I need to install I will highly appreciate it.
> Regards