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我正在尝试安装并使用Sablon红宝石宝石。我已经安装了xcode命令行开发者工具。但是,我继续得到以下错误:错误:无法在安装Sablon gem时创建gem本机扩展
ERROR: Error installing sablon:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb
checking if the C compiler accepts ... yes
checking if the C compiler accepts -Wno-error=unused-command-line-argument-hard-error-in-future... no
Building nokogiri using packaged libraries.
Using mini_portile version 2.1.0
checking for iconv.h... yes
checking for gzdopen() in -lz... yes
checking for iconv... yes
有关可能会发生什么的任何想法?