osx - ERROR: Error installing ffi: ERROR: Failed to build gem native extension -

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i getting error in mac 64 bit , have xcode inatalled on machine.

building native extensions.  take while... error:  error installing ffi:     error: failed build gem native extension.  /users/jreddy/.rvm/rubies/ruby-1.8.7-p302/bin/ruby extconf.rb checking ffi.h in /usr/local/include... no checking rb_thread_blocking_region()... no checking ruby_thread_has_gvl_p()... no checking ruby_native_thread_p()... no checking rb_thread_call_with_gvl()... no creating extconf.h creating makefile  make sh: make: command not found

i use homebrew, after did brew install libffi gem installed me. have xcode 4.2 tools active (with xcode-select). did have close , open new terminal window home-brew's install recognised gem installation. working ruby 1.8.7 not 1.9.3 (using rvm).


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