Hi can you please add 

mingw

as a calling convention so that gd2 works on Windows with RubyInstaller as well. RubyInstaller uses MingW as compiler.

Please see:

http://url.ba/cu4f

Luis Lavena helped to debug this:

Seems our mingw is not covered... let's do some small changes:

  def self.gd_library_name
    case RbConfig::CONFIG['host_os']
    when /darwin/
      'libgd.2.dylib'
    when /mingw|mswin/, /cygwin/
      'bgd.dll'
    else
      'libgd.so.2'
    end
  end 

the code you need to add is "ming" on line 29.

Best
Zeno

Date: 2011-02-16 19:59
Sender: Zeno R.R. Davatz

I am getting a very similar error on Max OS X 10.6.6

RuntimeError: dlopen(libgd.2.dylib, 9): image not found
	from /Library/Ruby/Gems/1.8/gems/gd2-1.1.1/lib/gd2.rb:58:in
`initialize'
	from /Library/Ruby/Gems/1.8/gems/gd2-1.1.1/lib/gd2.rb:58:in
`dlopen'
	from /Library/Ruby/Gems/1.8/gems/gd2-1.1.1/lib/gd2.rb:58
	from
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:32:in
`gem_original_require'
	from
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:32:in
`require'
	from (irb):2
	from /Library/Ruby/Site/1.8/rubygems/specification.rb:668

Date: 2011-01-16 07:46
Sender: Zeno R.R. Davatz

Thank you Jonas! I am also letting Luis Lavena now!

Best
Zeno

Date: 2011-01-15 20:49
Sender: Jonas Tingeborn

Ooops, was a reverse patch :)

Here's the proper one (in the right direction)

diff --git a/lib/gd2.rb b/lib/gd2.rb
index aaee294..b8f6080 100644
--- a/lib/gd2.rb
+++ b/lib/gd2.rb
@@ -30,7 +30,7 @@ module GD2
     case Config::CONFIG['arch']
     when /darwin/
       'libgd.2.dylib'
-    when /mswin32/, /cygwin/
+    when /mswin32/, /cygwin/, /mingw/
       'bgd.dll'
     else
       'libgd.so.2'
@@ -39,7 +39,7 @@ module GD2
 
   def self.name_for_symbol(symbol, signature)
     case Config::CONFIG['arch']
-    when /mswin32/, /cygwin/
+    when /mswin32/, /cygwin/, /mingw/
       sum = -4
       signature.each_byte do |char|
         sum += case char
@@ -147,7 +147,14 @@ module GD2
     :gdFontCacheShutdown                => '0',
     :gdFTUseFontConfig                  => 'II',
     :gdFree                             => '0P'
-  }.inject({}) { |x, (k, v)| x[k] = LIB[name_for_symbol(k, v),
v]; x }
+  }.inject({}) { |x, (k, v)| 
+    begin
+      x[k] = LIB[name_for_symbol(k, v), v]
+    rescue
+      x[k] = LIB["_" + name_for_symbol(k, v), v]
+    end
+    x 
+  }
 
   # Bit flags for Image#compare
 

Date: 2011-01-15 20:47
Sender: Jonas Tingeborn

I've added the fix via a repo on github, based on the 1.1.1 release
and added a fix for mingw (rubyinstaller). In addition, there
was an also an issue with underscore prefixed function names
in the bgd.dll I got from the latest binary release of gd2, so
that went in as well.

The commit is at https://github.com/jojje/gd2-ruby/commit/5bf06e8
37a9370633fd640ef9b1e2545d0ab3680
I've kept changes separate from the original source (in a mingw-fix
branch) to make it easy to spot any "unofficial"
changes.

Below is the patch against 1.1.1 for this problem:


diff --git a/lib/gd2.rb b/lib/gd2.rb
index b8f6080..aaee294 100644
--- a/lib/gd2.rb
+++ b/lib/gd2.rb
@@ -30,7 +30,7 @@ module GD2
     case Config::CONFIG['arch']
     when /darwin/
       'libgd.2.dylib'
-    when /mswin32/, /cygwin/, /mingw/
+    when /mswin32/, /cygwin/
       'bgd.dll'
     else
       'libgd.so.2'
@@ -39,7 +39,7 @@ module GD2
 
   def self.name_for_symbol(symbol, signature)
     case Config::CONFIG['arch']
-    when /mswin32/, /cygwin/, /mingw/
+    when /mswin32/, /cygwin/
       sum = -4
       signature.each_byte do |char|
         sum += case char
@@ -147,14 +147,7 @@ module GD2
     :gdFontCacheShutdown                => '0',
     :gdFTUseFontConfig                  => 'II',
     :gdFree                             => '0P'
-  }.inject({}) { |x, (k, v)| 
-    begin
-      x[k] = LIB[name_for_symbol(k, v), v]
-    rescue
-      x[k] = LIB["_" + name_for_symbol(k, v), v]
-    end
-    x 
-  }
+  }.inject({}) { |x, (k, v)| x[k] = LIB[name_for_symbol(k, v),
v]; x }
 
   # Bit flags for Image#compare