Overview: Preprocessing

This section describes the options you can use to direct the operations of the preprocessor. Preprocessing performs such tasks as macro substitution, conditional compilation, and file inclusion.

Preprocessor Options

Option	Description
-Aname[(value)]	Associates a symbol name with the specified value. Equivalent to an #assert preprocessing directive.
-A-	Causes all predefined macros and assertions to be inactive.
-C	Preserves comments in preprocessed source output.
-Dname[=text]	Defines the macro name and associates it with the specified text. The default (-Dname) defines a macro with where text = 1.
-E	Directs the preprocessor to expand your source module and write the result to stdout. Output includes #line directives.
-EP	Directs the preprocessor to expand your source module and write the result to standard output. The output does not include #line directives.
-P	Directs the preprocessor to expand your source module and store the result in a .i file in the current directory. Output does not include #line directives.
-Uname	Suppresses any automatic definition for the specified macro name.
-X	Remove standard directories from include file search path.
-H	Outputs the full path names of all included files to stdout in order. Indentation is used to designate the #include dependencies.
-M	Generate makefile dependency information.
-MD	Preprocess and compile. Generate output file (.d extension) containing dependency information.
-MFfile	Generate makefile dependency information in file. Must specify -M or -MM.
-MG	Similar to -M, but treats missing header files as generated files.
-MM	Similar to -M, but does not include system header files.
-MMD	Similar to -MD, but does not include system header files.
-MX	Generate dependency file (.o.dep extension) containing information used for the Intel wb tool.
-dM	Output macro definitions in effect after preprocessing (use with -E).
-MD	Preprocess and compile. Generate output file (.d extension) containing dependency information.
-Idirectory	Specifies an additional directory to search for include files.