To achieve this mapping, you may include conditional compilation #ifdef in places where you access the registers.
为了实现这种映射，您可以在访问寄存器的位置包括条件编译#指令。
Adding or removing conditional compilation directives.
加入或移除条件式编译指示词。
Specifies symbols on which to perform conditional compilation.
指定要对其执行条件编译的符号。
Describes prohibited edits of conditional compilation directives.
说明条件式编译指示词所禁止的编辑。
Lists the predefined variables available for conditional compilation.
列出条件式编译之可用的已定义变数。
Use the project Settings for defining conditional compilation constants.
使用项目设置定义条件编译常量。
This allows hosts that do not support conditional compilation to ignore it.
这样，不支持条件编译的宿主就可以忽略该代码。
B. Conditional compilation is used to allow tested classes to run at full speed.
有条件的编辑常被用于允许测试的类全速运行。
This enables hosts that do not support conditional compilation to ignore this code.
这样，不支持条件编译的宿主就可以忽略该代码。
Conditional compilation is also useful for server-side scripts and command-line programs.
编译对于服务器端脚本和命令行程序也很有用。
Before using a conditional compilation variable, conditional compilation must be turned on.
在使用条件编译变量之前，必须先打开条件编译。
When writing a script for a Web page, always place conditional compilation code in comments.
当编写用于网页的脚本时，始终将条件编译代码放在注释中。
When you write a script for a Web page, always put conditional compilation code in comments.
当编写用于网页的脚本时，始终将条件编译代码放入注释中。
Adding, removing, or changing the evaluation expression of a conditional compilation statement.
加入、移除，或变更条件式编译陈述式的评估运算式。
Conditional compilation constants have a special scope and cannot be accessed from standard code.
条件编译常数具有特殊的范围并且不能从标准代码访问。
Conditional compilation variables can be used to determine the version information of the engine interpreting a script.
条件编译变量可用于确定解释脚本的引擎的版本信息。
Conditional compilation constants determine whether tracing and debugging statements should be compiled into the assembly.
条件编译常量确定是否应当将跟踪和调试语句编译到程序集中。
A preprocessing step performs macro substitution on program text, inclusion of other source files, and conditional compilation.
编译的预处理阶段对程序文本进行宏替换，包含进其他源文件，并进行条件编译。
These conditional compilation directives can "hide" code by turning off the emission of debug symbols and resetting the line position.
这些条件式编译指示词可以“隐藏”程序码，方法为关闭侦错符号的发出并重设行位置。
Lists and discusses the statements that control compilation of a script depending on the values of the conditional compilation variables.
列出并讨论根据条件编译变量的值控制脚本编译的语句。
Syntaxes 3 and 4 are used to support conditional compilation while retaining compatibility with browsers that do not support that feature.
当与不支持该功能的浏览器之间保留兼容性时，语法3和4用来支持条件编译。
Code excluded during conditional compilation is completely omitted from the final executable file, so it has no effect on size or performance.
条件编译时被排除的代码在最终的可执行文件中被完全忽略，所以不会对大小或性能有任何影响。
Directives to the output, at the beginning and end of each included file and around lines removed by preprocessor directives for conditional compilation.
指令添加到输出中，位于每个包含文件的开头和结尾以及被条件编译预处理器指令移除的行的周围。
Scripting engines that do not support conditional compilation display a message advising of the need for a new scripting engine without generating errors.
不支持条件编译的脚本引擎显示一则消息，建议需要使用新的脚本引擎，而不会产生错误。
Note: If you do not enable this conditional compilation flag, you will get the release version of the driver object that will be used in the target environment.
注：如果我们没有启用这个条件编译标志，那么就可以得到一个可以在目标环境中使用的驱动程序对象文件。
Note: If you do not enable this conditional compilation flag, you will get the release version of the driver object that will be used in the target environment.
注：如果我们没有启用这个条件编译标志，那么就可以得到一个可以在目标环境中使用的驱动程序对象文件。
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