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gem 기본 확장을 빌드하지 못했습니다 (Compass 설치)
최신 버전의 나침반 ( https://rubygems.org/gems/compass/versions/1.0.0.alpha.17 ) 을 설치하려고 하면 다음 오류가 발생합니다. ERROR: Error installing compass: ERROR: Failed to build gem native extension. ERROR: Error installing compass: ERROR: Failed to build gem native extension. /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb checking for ffi.h... no checking for ffi.h in /usr/local/include,/usr/include/ffi... yes checking for ffi_call() in …