正如标题所示，它似乎并没有因为缺少 libxml2 或 libxslt 而失败。我不太确定该做什么make的错误。 （明白了吗？因为问题出在make期间？呵呵...）
无论如何，这是我得到的输出。任何想法，将不胜感激：
Building native extensions. This could take a while...
ERROR: Error installing nokogiri:
ERROR: Failed to build gem native extension.
/usr/bin/ruby1.9.1 extconf.rb
extconf.rb:10: Use RbConfig instead of obsolete and deprecated Config.
checking for libxml/parser.h... yes
checking for libxslt/xslt.h... yes
checking for libexslt/exslt.h... yes
checking for iconv_open() in iconv.h... yes
checking for xmlParseDoc() in -lxml2... yes
checking for xsltParseStylesheetDoc() in -lxslt... yes
checking for exsltFuncRegister() in -lexslt... yes
checking for xmlHasFeature()... yes
checking for xmlFirstElementChild()... yes
checking for xmlRelaxNGSetParserStructuredErrors()... yes
checking for xmlRelaxNGSetParserStructuredErrors()... yes
checking for xmlRelaxNGSetValidStructuredErrors()... yes
checking for xmlSchemaSetValidStructuredErrors()... yes
checking for xmlSchemaSetParserStructuredErrors()... yes
creating Makefile
make
compiling xml_element_content.c
compiling xml_relax_ng.c
compiling xml_cdata.c
compiling xml_sax_parser_context.c
compiling xml_node_set.c
compiling xml_text.c
compiling xml_sax_parser.c
compiling xml_attribute_decl.c
compiling nokogiri.c
nokogiri.c: In function ‘ruby_strdup’:
nokogiri.c:43:31: warning: conversion to ‘size_t’ from ‘long int’ may change the sign of the result [-Wsign-conversion]
compiling xml_entity_reference.c
compiling xml_node.c
compiling xml_xpath_context.c
xml_xpath_context.c: In function ‘xpath_generic_exception_handler’:
xml_xpath_context.c:184:3: error: format not a string literal and no format arguments [-Werror=format-security]
cc1: some warnings being treated as errors
make: *** [xml_xpath_context.o] Error 1
Gem files will remain installed in /var/lib/gems/1.9.1/gems/nokogiri-1.5.0 for inspection.
Results logged to /var/lib/gems/1.9.1/gems/nokogiri-1.5.0/ext/nokogiri/gem_make.out
作为上下文，我昨晚从 Ubuntu 12.04 升级到 12.10。我之前在这个盒子上构建了 Nokogiri 本机扩展，尽管我不知道它是否是相同的版本。
我还检查了我是否拥有第二篇文章中指定的所有软件包“使用 Rails 3.1.0 和 ubuntu 安装 nokogiri 1.5.0 时出错 https://stackoverflow.com/questions/8003523/error-installing-nokogiri-1-5-0-with-rails-3-1-0-and-ubuntu”
无济于事。
我花了一些时间弄清楚如何附加 cflags。这是我对 nokogiri 1.4.7 的命令：
sudo gem install nokogiri -v '1.4.7' -- --with-cflags=\"-Wformat-nonliteral -Wno-format-security\"
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