1 files changed, 30 insertions, 5 deletions
diff --git a/ext/psych/extconf.rb b/ext/psych/extconf.rb
index ccc8c9c304..b294aabcff 100644
--- a/ext/psych/extconf.rb
+++ b/ext/psych/extconf.rb
@@ -1,15 +1,40 @@
 require 'mkmf'
+require 'fileutils'
 
 # :stopdoc:
 
 dir_config 'libyaml'
 
-def asplode missing
-  raise "#{missing} is missing. Please install libyaml."
-end
+unless find_header('yaml.h') && find_library('yaml', 'yaml_get_version')
+  # Embed libyaml since we could not find it.
+
+  srcdir = File.expand_path File.dirname __FILE__
+  files = Dir.chdir File.join(srcdir, 'yaml') do
+    Dir.entries(Dir.pwd).find_all { |f|
+      File.file?(f) && File.extname(f) =~ /^\.[hc]/
+    }.map { |f| File.expand_path f }
+  end
+
+  FileUtils.cp_r files, srcdir
 
-asplode('yaml.h')  unless find_header  'yaml.h'
-asplode('libyaml') unless find_library 'yaml', 'yaml_get_version'
+  if $mswin
+    $CFLAGS += " -DYAML_DECLARE_STATIC -DHAVE_CONFIG_H"
+  end
+
+  have_header 'dlfcn.h'
+  have_header 'inttypes.h'
+  have_header 'memory.h'
+  have_header 'stdint.h'
+  have_header 'stdlib.h'
+  have_header 'strings.h'
+  have_header 'string.h'
+  have_header 'sys/stat.h'
+  have_header 'sys/types.h'
+  have_header 'unistd.h'
+
+  find_header 'yaml.h'
+  have_header 'config.h'
+end
 
 create_makefile 'psych'