* lib/mkmf.rb (find_executable0): default path if environment is not

set.  [ruby-dev:27281]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9271 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,5 +1,10 @@
+Thu Sep 22 23:36:24 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/mkmf.rb (find_executable0): default path if environment is not
+	  set.  [ruby-dev:27281]
+
 Thu Sep 22 17:31:48 2005  Shugo Maeda  <shugo@ruby-lang.org>
-	
+
 	* test/readline/test_readline.rb (TestReadline::replace_stdio):
 	  merged the patch of [ruby-dev:25232] instead of [ruby-dev:25223].
 	  (merged from ruby_1_8 branch)

lib/mkmf.rb

@@ -762,8 +762,17 @@ def what_type?(type, member = nil, headers = nil, &b)
 end
 
 def find_executable0(bin, path = nil)
-  path = (path || ENV['PATH']).split(File::PATH_SEPARATOR)
   ext = config_string('EXEEXT')
+  if File.expand_path(bin) == bin
+    return bin if File.executable?(bin)
+    return file if ext and File.executable?(file = bin + ext)
+    return nil
+  end
+  if path ||= ENV['PATH']
+    path = path.split(File::PATH_SEPARATOR)
+  else
+    path = %w[/usr/local/bin /usr/ucb /usr/bin /bin]
+  end
   file = nil
   path.each do |dir|
     return file if File.executable?(file = File.join(dir, bin))