* lib/mkmf.rb (check_sizeof): should return integer always.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@30068 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/mkmf/test_find_executable.rb

@@ -0,0 +1,36 @@
+require File.join(File.dirname(__FILE__), 'base')
+
+class TestMkmf
+  class TestFindExecutable < TestMkmf
+    class F
+      def do_find_executable(name)
+        find_executable(name)
+      end
+    end
+
+    def test_find_executable
+      bug2669 = '[ruby-core:27912]'
+      path, ENV["PATH"] = ENV["PATH"], path
+      ENV["PATH"] = @tmpdir
+      f = F.new
+      name = "foobar#{$$}#{rand(1000)}"
+      if /mswin\d|mingw|cygwin/ =~ RUBY_PLATFORM
+        exts = %w[.exe .com .cmd .bat]
+      else
+        exts = [""]
+      end
+      exts.each do |ext|
+        full = name+ext
+        begin
+          open(full, "w") {|ff| ff.chmod(0755)}
+          result = f.do_find_executable(name)
+        ensure
+          File.unlink(full)
+        end
+        assert_equal("#{@tmpdir}/#{name}#{ext}", result, bug2669)
+      end
+    ensure
+      ENV["PATH"] = path
+    end
+  end
+end