当我尝试使用以下命令安装 rmagic 时：
gem install rmagic
它给出错误：
Building native extensions. This could take a while...
ERROR: Error installing rmagick:
ERROR: Failed to build gem native extension.
/home/biske/.rbenv/versions/2.0.0-p247/bin/ruby extconf.rb
checking for Ruby version >= 1.8.5... yes
checking for gcc... yes
checking for Magick-config... yes
checking for ImageMagick version >= 6.4.9... yes
checking for HDRI disabled version of ImageMagick... yes
checking for stdint.h... yes
checking for sys/types.h... yes
checking for wand/MagickWand.h... no
Can't install RMagick 2.13.2. Can't find MagickWand.h.
*** 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.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/home/biske/.rbenv/versions/2.0.0-p247/bin/ruby
Gem files will remain installed in /home/biske/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rmagick-2.13.2 for inspection.
Results logged to /home/biske/.rbenv/versions/2.0.0-p247/lib/ruby/gems/2.0.0/gems/rmagick-2.13.2/ext/RMagick/gem_make.out
我试图寻找问题，发现我缺少 libmagickwand-dev。我尝试使用以下命令安装它：
sudo apt-get install libmagickwand-dev
但它会引发错误：
The following packages have unmet dependencies:
libmagickwand-dev : Depends: libmagickcore-dev (= 8:6.7.7.10-5ubuntu2) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
如果我尝试使用以下命令安装它：
sudo apt-get install libmagickcore-dev
它给出错误：
The following packages have unmet dependencies:
libmagickcore-dev : Depends: librsvg2-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
如果我尝试使用以下命令安装它：
sudo apt-get install librsvg2-dev
它给出错误：
The following packages have unmet dependencies:
librsvg2-dev : Depends: libglib2.0-dev (>= 2.24.0) but it is not going to be installed
Depends: libgdk-pixbuf2.0-dev (>= 2.23.5-2) but it is not going to be installed
Depends: libcairo2-dev (>= 1.2.0) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
如果我尝试使用以下命令安装 libglib2.0-dev：
sudo apt-get install libglib2.0-dev
它给出错误：
The following packages have unmet dependencies:
libglib2.0-dev : Depends: libglib2.0-0 (= 2.36.0-1ubuntu1) but 2.36.0-1ubuntu2 is to be installed
Depends: libglib2.0-bin (= 2.36.0-1ubuntu1)
E: Unable to correct problems, you have held broken packages.
如果我使用以下命令安装 libglib2.0-0：
sudo apt-get install libglib2.0-0
它给：
libglib2.0-0 is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
如果我使用以下命令安装 libglib2.0-bin：
sudo apt-get install libglib2.0-bin
它给：
Reading package lists... Done
Building dependency tree
Reading state information... Done
libglib2.0-bin is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
这 2 个库已安装但再次发出：
sudo apt-get install libglib2.0-dev
它给出了同样的错误：
The following packages have unmet dependencies:
libglib2.0-dev : Depends: libglib2.0-0 (= 2.36.0-1ubuntu1) but 2.36.0-1ubuntu2 is to be installed
Depends: libglib2.0-bin (= 2.36.0-1ubuntu1)
E: Unable to correct problems, you have held broken packages.
这里可能有什么问题？
我正在使用 Ubuntu 13.04、rbenv、ruby 2.0.0（如果有的话）。
