> I just pushed 1.1.0.rc2 to rubygems.  Please try it out and report any 
> installation problems on your favourite platform.

uname -rsm
Linux 3.2.13-1-ARCH i686

ruby --version
ruby 2.0.0dev (2012-04-05 trunk 35241) [i686-linux]

gcc --version
gcc (GCC) 4.7.0 20120324 (prerelease)

gem install ffi --pre --user-install
Fetching: ffi-1.1.0.rc2.gem (100%)
Building native extensions.  This could take a while...
Successfully installed ffi-1.1.0.rc2
1 gem installed

ripl -r ffi

>> FFI::Platform::IS_LINUX

=> true

>> FFI::Platform::IS_WINDOWS

=> false

=============================

# Win7 Ultimate 32bit
ruby --version
ruby 1.9.3p174 (2012-04-03 revision 35222) [i386-mingw32]

gcc --version
gcc (GCC) 4.6.2

gem install ffi --pre
Fetching: ffi-1.1.0.rc2-x86-mingw32.gem (100%)
Successfully installed ffi-1.1.0.rc2-x86-mingw32
1 gem installed

ripl -r ffi

>> FFI::Platform::IS_LINUX

=> false

>> FFI::Platform::IS_WINDOWS

=> true


Jon

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