gem在Fedora16中安装nokogiri失败

Question

我在Fedora 16中运行Ruby1.9.3p194和Rails 3.2.9。

    ERROR:  Error installing nokogiri:
    ERROR: Failed to build gem native extension.

        /home/chelseaw/.rvm/rubies/ruby-1.9.3-p194/bin/ruby extconf.rb
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... no
checking for iconv_open() in -liconv... no
checking for iconv_open() in -liconv... no
checking for libiconv_open() in iconv.h... no
checking for libiconv_open() in -liconv... no
checking for libiconv_open() in -liconv... no
-----
libiconv is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
-----
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

我在谷歌上搜索了很长一段时间，但只为MacOS找到了一些解决方案。我不知道该怎么办，请帮帮忙。

编辑1 yum search iconv的结果

mingw32-iconv-debuginfo.noarch : Debug information for package mingw32-iconv
mingw32-iconv-static.noarch : Static version of the MinGW Windows Iconv library
mingw32-win-iconv.noarch : MinGW Windows Iconv library
mingw32-win-iconv-debuginfo.noarch : Debug information for package
                                   : mingw-win-iconv
mingw32-win-iconv-static.noarch : Static version of the MinGW Windows Iconv
                                : library
perl-Text-Iconv.i686 : Perl interface to iconv() codeset conversion function
perl-Text-Iconv-debuginfo.i686 : Debug information for package perl-Text-Iconv
psiconv-debuginfo.i686 : Debug information for package psiconv
psiconv-devel.i686 : Development files for psiconv
uniconvertor-debuginfo.i686 : Debug information for package uniconvertor
mingw32-iconv.noarch : GNU libraries and utilities for character set conversion
perl-HTML-WikiConverter.noarch : Perl module to convert HTML to wiki markup
perl-HTML-WikiConverter-Markdown.noarch : Convert HTML to Markdown markup
psiconv.i686 : A conversion utility for Psion files
uniconvertor.i686 : Universal vector graphics translator

Answer 1

终于成功了，下面是几个步骤：

• 下载libiconv wget http://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.11.tar.gz
• 提取文件tar -xvzf libiconv-1.11.tar.gz
• 输入目录cd libiconv-1.11
• 配置libiconv库./configure --prefix=/usr/local/libiconv
• 编译libiconv make CFLAGS="-O2 -fno-tree-dce -fno-optimize-sibling-calls" (我必须添加CFLAGS来完成编译工作)。
• 安装libiconv sudo make install
• 安装nokogiri CFLAGS="-O2 -fno-tree-dce -fno-optimize-sibling-calls" gem install nokogiri -- --with-iconv-dir=/usr/local/libiconv --with-iconv-lib=/usr/local/libiconv/lib --with-iconv-include=/usr/local/libiconv/include

瞧，它展示了成功的信息！

Answer 2

不需要自己编译它，试着运行以下命令：

sudo yum install -y gcc ruby-devel libxml2 libxml2-devel libxslt libxslt-devel

或者：

rvm get head && rvm requirements run force

Answer 3

尝试：

yum install -y iconv-devel

然后：

gem install nokogiri