Update: Check out this follow-up question: Gem Update on Windows - is it broken?
On Windows, when I do this:
gem install sqlit
first from sqlite.org(http://www.sqlite.org/download.html)
download ->
Precompiled Binaries: sqlite-dll-win32-x86-3071700.zip
and Source Code: sqlite-autoconf-3071700.tar.gz
then extract as:
-include
--sqlite3.h
--sqlite3ext.h
-lib
--shell.c
--sqlite3.c
--sqlite3.def
--sqlite3.dll
last install gem like:
gem install sqlite3 --platform=ruby -- --with-sqlite3-include=path\to\include
--with-sqlite3-lib=path\to\lib --no-ri --no-rdoc
Good luck!