爲什麼我有一個問題，安裝rmagick

Question

關於Ruby 1.8.7和2.3.5軌道，我得到：

gem install rmagick 

ERROR: Error installing rmagick: 

ERROR: Failed to build gem native extension. 


    /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb 
    mkmf.rb can't find header files for ruby at  
    /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h 


Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1 for inspection. 

Results logged to /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/ext/RMagick/gem_make.out 

Building native extensions. This could take a while... 

Cynicalgrinch:levelous pawel$ gem install rmagick 

Building native extensions. This could take a while... 

ERROR: Error installing rmagick: 

    ERROR: Failed to build gem native extension. 


     /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb 

mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h 


Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1 for inspection. 

Results logged to /Library/Ruby/Gems/1.8/gems/rmagick-2.13.1/ext/RMagick/gem_make.out 


Gem_make.out says this: 

/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb 
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h 

Answer 1

要與寶石系統安裝rmagick，你必須有「ImageMagick的」您的系統上。以下錯誤行表示rmagick無法構建，因爲系統上不存在本機擴展名（imagemagick）。

ERROR: Failed to build gem native extension. 

在OSX，可以使用brew安裝的ImageMagick（最好在我看來的方式）。一旦沖泡安裝：

brew install imagemagick 
gem install rmagick 

在山獅（OSX），後：

brew install imagemagick 

可能需要強制能夠安裝rmagick寶石之前手動重新創建一些符號鏈接。

> brew link -f jpeg 
> brew link -f libpng 
> brew link -f freetype 
> brew link -f imagemagick 

Answer 2

在Ubuntu/Debian的，你需要安裝：

sudo apt-get install libmagickwand-dev 

在RedHat/Fedora的/ CentOS的：

yum install ImageMagick-devel