gcc库的原代码,对编程有很大帮助.

				'xrdef {Top-title}{The C Preprocessor}				'xrdef {Top-pg}{1}				'xrdef {Top-snt}{Chapter'tie1}				'xrdef {Global Actions-title}{Transformations Made Globally}				'xrdef {Global Actions-pg}{1}				'xrdef {Global Actions-snt}{Section'tie1.1}				'xrdef {Commands-title}{Preprocessor Commands}				'xrdef {Commands-pg}{3}				'xrdef {Commands-snt}{Section'tie1.2}				'xrdef {Header Files-title}{Header Files}				'xrdef {Header Files-pg}{3}				'xrdef {Header Files-snt}{Section'tie1.3}				'xrdef {Header Uses-title}{Uses of Header Files}				'xrdef {Header Uses-pg}{4}				'xrdef {Header Uses-snt}{Section'tie1.3.1}				'xrdef {Include Syntax-title}{The \samp {#include} Command}				'xrdef {Include Syntax-pg}{4}				'xrdef {Include Syntax-snt}{Section'tie1.3.2}				'xrdef {Include Operation-title}{How \samp {#include} Works}				'xrdef {Include Operation-pg}{5}				'xrdef {Include Operation-snt}{Section'tie1.3.3}				'xrdef {Once-Only-title}{Once-Only Include Files}				'xrdef {Once-Only-pg}{6}				'xrdef {Once-Only-snt}{Section'tie1.3.4}				'xrdef {Inheritance-title}{Inheritance and Header Files}				'xrdef {Inheritance-pg}{8}				'xrdef {Inheritance-snt}{Section'tie1.3.5}				'xrdef {Macros-title}{Macros}				'xrdef {Macros-pg}{9}				'xrdef {Macros-snt}{Section'tie1.4}				'xrdef {Simple Macros-title}{Simple Macros}				'xrdef {Simple Macros-pg}{9}				'xrdef {Simple Macros-snt}{Section'tie1.4.1}				'xrdef {Argument Macros-title}{Macros with Arguments}				'xrdef {Argument Macros-pg}{10}				'xrdef {Argument Macros-snt}{Section'tie1.4.2}				'xrdef {Predefined-title}{Predefined Macros}				'xrdef {Predefined-pg}{13}				'xrdef {Predefined-snt}{Section'tie1.4.3}				'xrdef {Standard Predefined-title}{Standard Predefined Macros}				'xrdef {Standard Predefined-pg}{13}				'xrdef {Standard Predefined-snt}{Section'tie1.4.3.1}				'xrdef {Nonstandard Predefined-title}{Nonstandard Predefined Macros}				'xrdef {Nonstandard Predefined-pg}{15}				'xrdef {Nonstandard Predefined-snt}{Section'tie1.4.3.2}				'xrdef {Stringification-title}{Stringification}				'xrdef {Stringification-pg}{17}				'xrdef {Stringification-snt}{Section'tie1.4.4}				'xrdef {Concatenation-title}{Concatenation}				'xrdef {Concatenation-pg}{18}				'xrdef {Concatenation-snt}{Section'tie1.4.5}				'xrdef {Undefining-title}{Undefining Macros}				'xrdef {Undefining-pg}{20}				'xrdef {Undefining-snt}{Section'tie1.4.6}				'xrdef {Redefining-title}{Redefining Macros}				'xrdef {Redefining-pg}{20}				'xrdef {Redefining-snt}{Section'tie1.4.7}				'xrdef {Macro Pitfalls-title}{Pitfalls and Subtleties of Macros}				'xrdef {Macro Pitfalls-pg}{21}				'xrdef {Macro Pitfalls-snt}{Section'tie1.4.8}				'xrdef {Misnesting-title}{Improperly Nested Constructs}				'xrdef {Misnesting-pg}{21}				'xrdef {Misnesting-snt}{Section'tie1.4.8.1}				'xrdef {Macro Parentheses-title}{Unintended Grouping of Arithmetic}				'xrdef {Macro Parentheses-pg}{22}				'xrdef {Macro Parentheses-snt}{Section'tie1.4.8.2}				'xrdef {Swallow Semicolon-title}{Swallowing the Semicolon}				'xrdef {Swallow Semicolon-pg}{23}				'xrdef {Swallow Semicolon-snt}{Section'tie1.4.8.3}				'xrdef {Side Effects-title}{Duplication of Side Effects}				'xrdef {Side Effects-pg}{24}				'xrdef {Side Effects-snt}{Section'tie1.4.8.4}				'xrdef {Self-Reference-title}{Self-Referential Macros}				'xrdef {Self-Reference-pg}{25}				'xrdef {Self-Reference-snt}{Section'tie1.4.8.5}				'xrdef {Argument Prescan-title}{Separate Expansion of Macro Arguments}				'xrdef {Argument Prescan-pg}{26}				'xrdef {Argument Prescan-snt}{Section'tie1.4.8.6}				'xrdef {Cascaded Macros-title}{Cascaded Use of Macros}				'xrdef {Cascaded Macros-pg}{29}				'xrdef {Cascaded Macros-snt}{Section'tie1.4.8.7}				'xrdef {Newlines in Args-title}{Newlines in Macro Arguments}				'xrdef {Newlines in Args-pg}{30}				'xrdef {Newlines in Args-snt}{Section'tie1.4.9}				'xrdef {Conditionals-title}{Conditionals}				'xrdef {Conditionals-pg}{30}				'xrdef {Conditionals-snt}{Section'tie1.5}				'xrdef {Conditional Uses-title}{Why Conditionals are Used}				'xrdef {Conditional Uses-pg}{31}				'xrdef {Conditional Uses-snt}{Section'tie1.5.1}				'xrdef {Conditional Syntax-title}{Syntax of Conditionals}				'xrdef {Conditional Syntax-pg}{31}				'xrdef {Conditional Syntax-snt}{Section'tie1.5.2}				'xrdef {#if Command-title}{The \samp {#if} Command}				'xrdef {#if Command-pg}{31}				'xrdef {#if Command-snt}{Section'tie1.5.2.1}				'xrdef {#else Command-title}{The \samp {#else} Command}				'xrdef {#else Command-pg}{32}				'xrdef {#else Command-snt}{Section'tie1.5.2.2}				'xrdef {#elif Command-title}{The \samp {#elif} Command}				'xrdef {#elif Command-pg}{33}				'xrdef {#elif Command-snt}{Section'tie1.5.2.3}				'xrdef {Deleted Code-title}{Keeping Deleted Code for Future Reference}				'xrdef {Deleted Code-pg}{34}				'xrdef {Deleted Code-snt}{Section'tie1.5.3}				'xrdef {Conditionals-Macros-title}{Conditionals and Macros}				'xrdef {Conditionals-Macros-pg}{34}				'xrdef {Conditionals-Macros-snt}{Section'tie1.5.4}				'xrdef {Assertions-title}{Assertions}				'xrdef {Assertions-pg}{36}				'xrdef {Assertions-snt}{Section'tie1.5.5}				'xrdef {#error Command-title}{The \samp {#error} and \samp {#warning} Commands}				'xrdef {#error Command-pg}{38}				'xrdef {#error Command-snt}{Section'tie1.5.6}				'xrdef {Combining Sources-title}{Combining Source Files}				'xrdef {Combining Sources-pg}{39}				'xrdef {Combining Sources-snt}{Section'tie1.6}				'xrdef {Other Commands-title}{Miscellaneous Preprocessor Commands}				'xrdef {Other Commands-pg}{40}				'xrdef {Other Commands-snt}{Section'tie1.7}				'xrdef {Output-title}{C Preprocessor Output}				'xrdef {Output-pg}{41}				'xrdef {Output-snt}{Section'tie1.8}				'xrdef {Invocation-title}{Invoking the C Preprocessor}				'xrdef {Invocation-pg}{41}				'xrdef {Invocation-snt}{Section'tie1.9}				'xrdef {Concept Index-title}{Concept Index}				'xrdef {Concept Index-pg}{47}				'xrdef {Concept Index-snt}{}				'xrdef {Index-title}{Index of Commands, Macros and Options}				'xrdef {Index-pg}{49}				'xrdef {Index-snt}{}