Howto: Install RMagick on Windows 64 bits

I ran into a lot of problems trying to install RMagick on my 64bits Windows, but finally succeeded.

Here is how:

1. Install ImageMagick: version 6.6.9-5 32 bits. The version is important: I tried with 64bits versions, and also with 6.6.9-9 and 6.7.* versions and it failed miserably. You can find it here. Don’t forget to include development headers for C and C++ and also modify the PATH environment variable during the installation process.
2. Install the Ruby Development Kit. You can find it here.
3. Modify a little header in the DevKit. Search for the file /mingw/include/sys/types.h, and replace int with long at line 115:

   mingw/include/sys/types.h

   104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120

   #ifndef _SIGSET_T_ #define _SIGSET_T_ typedef int _sigset_t;   #ifndef _NO_OLDNAMES typedef _sigset_t   sigset_t; #endif #endif  /* Not _SIGSET_T_ */   #ifndef _SSIZE_T_ #define _SSIZE_T_ typedef long _ssize_t;   #ifndef _NO_OLDNAMES typedef _ssize_t ssize_t; #endif #endif /* Not _SSIZE_T_ */

4. In a terminal, modify your environment this way:

   set DFImageMagick=<ImageMagickInstallationPath> set CPATH=%DFImageMagick%\include;%CPATH% set LIBRARY_PATH=%DFImageMagick%\lib;%LIBRARY_PATH%

5. Install RMagick gem:

   gem install rmagick

This worked for me, I hope it will help others.