在Ubuntu 12上安装Nokogiri时出现错误：
Installing nokogiri (1.4.4) with native extensions
Gem::Installer::ExtensionBuildError: 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 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 html_sax_parser_context.c
compiling xml_io.c
compiling xml_entity_reference.c
compiling xml_schema.c
compiling xml_element_content.c
compiling xml_reader.c
compiling xml_sax_push_parser.c
compiling xml_sax_parser.c
compiling xslt_stylesheet.c
compiling xml_element_decl.c
compiling xml_node.c
compiling xml_cdata.c
compiling xml_processing_instruction.c
compiling xml_entity_decl.c
compiling xml_attribute_decl.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 /home/alex/.bundler/tmp/22194/gems/nokogiri-1.4.4 for inspection.
Results logged to /home/alex/.bundler/tmp/22194/gems/nokogiri-1.4.4/ext/nokogiri/gem_make.out
An error occurred while installing nokogiri (1.4.4), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.4.4'` succeeds before bundling.
我已经安装了libxslt-dev和libxml2-dev，但正如你所看到的那样，它没有帮助。
我该如何解决？
答案 0 :(得分：2)
我偶然发现这个尝试在ubuntu 13.04上安装bigbluebutton
我解决了这个诀窍，编译恢复系统范围内的-Wformat-security gcc标志
小心做第一个rm。它会打破你的整个系统!!
rm /usr/bin/gcc
nano /usr/bin/gcc
## contents of /usr/bin/gcc
#!/bin/sh
gcc-4.7 $* -Wno-format-security
## save and exit
chmod u+x /usr/bin/gcc
gem install nokogiri -v '1.4.4'
答案 1 :(得分：0)
是否有特定原因需要1.4.4而不是最新的1.5.6？否则我建议升级。
Nokogiri changelog显示他们在1.5.4中解决了这个问题：
为使用的强化Debian系统构建支持
-Werror=format-security。 ＃680。
答案 2 :(得分：0)
@Confusion有正确的想法。
Bundler可能在Gemfile和/或Gemfile.lock中被锁定为nokogiri-1.4.4。 @ Confusion运行bundle update的答案应该允许你的Ruby Bundler环境使用成功安装的nokogiri-1.5.6。