Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
https://stackoverflow.com/questions/27699304/bundle-error-on-os-x
xcode-select -s /Library/Developer/CommandLineTools/
をしないといけないっぽい時がある??
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
https://stackoverflow.com/questions/27699304/bundle-error-on-os-x
xcode-select -s /Library/Developer/CommandLineTools/
をしないといけないっぽい時がある??