Have you installed Xcode/Developer tools?

- Colby

On Nov 8, 2011, at 5:29 PM, Adrian wrote:

> When trying to install the lib ffi as a ruby gem from bundler or brew
> i get the following output.. Has anybody run into this and found a
> solution?
> 
> Adrian
> 
> 
> 11.2.0 Darwin Kernel Version 11.2.0: Tue Aug  9 20:54:00 PDT 2011;
> root:xnu-1699.24.8~1/RELEASE_X86_64 x86_64
> 
> 
> 
> Installing ffi (1.0.9) with native extensions
> Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native
> extension.
> 
>        /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/
> ruby extconf.rb
> checking for ffi.h in /usr/local/include... no
> checking for rb_thread_blocking_region()... no
> checking for ruby_thread_has_gvl_p()... no
> checking for ruby_native_thread_p()... no
> checking for rb_thread_call_with_gvl()... no
> creating extconf.h
> creating Makefile
> 
> make
> Configuring libffi for rch
> configure: WARNING: If you wanted to set the --build type, don't use --
> host.
>    If a cross compiler is detected then cross compile mode will be
> used.
> Invalid configuration `rch-apple-darwin': machine `rch-apple' not
> recognized
> configure: error: /bin/sh /Users/adrian/.bundler/tmp/21514/gems/
> ffi-1.0.9/ext/ffi_c/libffi/config.sub rch-apple-darwin failed
> make[1]: *** No targets specified and no makefile found.  Stop.
> Configuring libffi for rch
> configure: WARNING: If you wanted to set the --build type, don't use --
> host.
>    If a cross compiler is detected then cross compile mode will be
> used.
> Invalid configuration `rch-apple-darwin': machine `rch-apple' not
> recognized
> configure: error: /bin/sh /Users/adrian/.bundler/tmp/21514/gems/
> ffi-1.0.9/ext/ffi_c/libffi/config.sub rch-apple-darwin failed
> make[1]: *** No targets specified and no makefile found.  Stop.
> make: *** [/Users/adrian/.bundler/tmp/21514/gems/ffi-1.0.9/ext/ffi_c/
> libffi/.libs/libffi_convenience.a] Error 2
> 
> 
> Gem files will remain installed in /Users/adrian/.bundler/tmp/21514/
> gems/ffi-1.0.9 for inspection.
> Results logged to /Users/adrian/.bundler/tmp/21514/gems/ffi-1.0.9/ext/
> ffi_c/gem_make.out
> An error occured while installing ffi (1.0.9), and Bundler cannot
> continue.
> Make sure that `gem install ffi -v '1.0.9'` succeeds before bundling.