def run_test(self):
                oldlibpath = self.env['LIBPATH']
                oldlib = self.env['LIB']

                # try the enumerator to find the correct libpath
                test = self.conf.create_library_enumerator()
                test.name = self.name
                test.want_message = 0
                test.path = self.path
                test.env = self.env
                ret = test.run()

                if ret:
                        self.env['LIBPATH_'+self.uselib] = ret

                self.env['LIB_'+self.uselib] = self.name

                val = {}

                #self.env['LIB'] = self.name
                #self.env['LIBPATH'] = self.lib_paths

                obj               = check_data()
                obj.code          = self.code
                obj.env           = self.env
                obj.uselib        = self.uselib
                obj.libpath       = self.path

                ret = int(self.conf.run_check(obj))
                self.conf.check_message('library %s' % self.name, '', ret)

                self.conf.add_define(self.define, ret)

                if ret:
                        val['LIBPATH_'+self.uselib] = self.env['LIBPATH_'+self.uselib]
                        val['LIB_'+self.uselib] = self.env['LIB_'+self.uselib]
                        val[self.define] = ret

                self.env['LIB'] = oldlib
                self.env['LIBPATH'] = oldlibpath

                if not ret: return {}
                return val