Bluecloth v2.0.10 with windows 7 not working - ruby-on-rails

Question

WIth Ruby 187, I had downloaded devkit from http://rubyinstaller.org/downloads
and followed the instruction per https://github.com/oneclick/rubyinstaller/wiki/Development-Kit.
I had also ensured that devkit is installed properly by following
smoke test.
I had then tried installing bluecloth (v2.0.10). It had failed with
following error:
C:\test\typo>gem install bluecloth --platform=ruby
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error installing bluecloth:
ERROR: Failed to build gem native extension.
c:/Ruby187/bin/ruby.exe extconf.rb
checking for srand()... yes
checking for random()... no
checking for rand()... yes
checking for bzero() in string.h,strings.h... no
checking for strcasecmp()... yes
checking for strncasecmp()... yes
checking for mkdio.h... yes
checking for ruby/encoding.h... no
creating extconf.h
creating Makefile
make
gcc -I. -I. -Ic:/Ruby187/lib/ruby/1.8/i386-mingw32 -I. -
DRUBY_EXTCONF_H=\"extcon
f.h\" -DVERSION=\"2.0.4\" -g -O2 -DFD_SETSIZE=256 -I. -Wall -c
bluecloth.c
In file included from c:\rubydevkit\mingw\bin\../lib/gcc/
mingw32/4.5.1/../../../../include/windows.h:48:0,
from c:\rubydevkit\mingw\bin\../lib/gcc/
mingw32/4.5.1/../../../../include/winsock2.h:22,
from c:/Ruby187/lib/ruby/1.8/i386-mingw32/win32/
win32.h:27,
from c:/Ruby187/lib/ruby/1.8/i386-mingw32/defines.h:
186,
from c:/Ruby187/lib/ruby/1.8/i386-mingw32/ruby.h:37,
from bluecloth.h:14,
from bluecloth.c:25:
c:\rubydevkit\mingw\bin\../lib/gcc/mingw32/4.5.1/../../../../include/
windef.h:229:23: error: duplicate 'unsigned'
c:\rubydevkit\mingw\bin\../lib/gcc/mingw32/4.5.1/../../../../include/
windef.h:238:23: error: duplicate 'unsigned'
c:\rubydevkit\mingw\bin\../lib/gcc/mingw32/4.5.1/../../../../include/
windef.h:238:23: error: two or more data types in declaration
specifiers
c:\rubydevkit\mingw\bin\../lib/gcc/mingw32/4.5.1/../../../../include/
windef.h:241:24: error: duplicate 'unsigned'
bluecloth.c: In function 'bluecloth_initialize':
bluecloth.c:190:9: warning: unused variable 'utf8text'
make: *** [bluecloth.o] Error 1
Gem files will remain installed in c:/Ruby187/lib/ruby/gems/1.8/gems/
bluecloth-2.0.10 for inspection.
Results logged to c:/Ruby187/lib/ruby/gems/1.8/gems/bluecloth-2.0.10/
ext/gem_make.out
C:\test\typo>

Answer 1

If you need 2.2.0 (the latest version), here's how I got it to work:
Install DevKit
Run the command below to install bluecloth:
gem install bluecloth
this will fail miserably when building "native extensions", but will successfully install the gem's source code.
Patch bluecloth.h file (for me, this is found in: D:\ruby\Ruby-1.9.3-p125\lib\ruby\gems\1.9.1\gems\bluecloth-2.2.0\ext), with the patch from here: https://gist.github.com/1539611
Go to bluecloth's gem installation folder. For me, this looks like below:
D:\ruby\Ruby-1.9.3-p125\lib\ruby\gems\1.9.1\gems\bluecloth-2.2.0
Run the following command:
rake gem
It may prompt you to install some other gems, follow accordingly.
When it's done, you should see a bluecloth-2.2.0.gem created. For me, it is found here:
D:\ruby\Ruby-1.9.3-p125\lib\ruby\gems\1.9.1\gems\bluecloth-2.2.0\pkg\bluecloth-2.2.0.gem
Go to bluecloth-2.2.0.gem location, and run the following command:
gem install bluecloth-2.2.0.gem --platform=ruby

Answer 2

It seems there is a bug/issue with version 2.0.10 of BlueCloth. You can try using an older version like 2.0.7:
gem install bluecloth -v 2.0.7
Which seems to work.
Also probably this worth checking latest version (2.2.0?) and if not work, report it back to gem author:
http://deveiate.org/projects/BlueCloth/query

Answer 3

This is the patched bluecloth.h code, for people in a hurry...
#ifndef BLUECLOTH_H
#define BLUECLOTH_H
#include "ruby.h"
#if defined(HAVE_RUBY_ENCODING_H) && HAVE_RUBY_ENCODING_H
# define M17N_SUPPORTED
# include "ruby/encoding.h"
#endif
#include "config.h"
#include "assert.h"
#include "mkdio.h"
void mkd_initialize _(( void ));
void mkd_with_html5_tags _(( void ));
/* Replace the macro from encoding.h that refers to static 'rb_encoding_list' */
#ifdef ENC_FROM_ENCINDEX
#undef ENC_FROM_ENCINDEX
#define ENC_FROM_ENCINDEX(idx) (rb_enc_from_index(idx))
#endif
#endif

Answer 4

There's a fork on github that already includes the patch:
https://github.com/drakontia/bluecloth