The preprocessor of the IAR C/C++ Compiler for RISC-V adheres to Standard C. The compiler also makes these preprocessor-related features available to you:

• Predefined preprocessor symbols

  These symbols allow you to inspect the compile-time environment, for example, the time and date of compilation. For more information, see Description of predefined preprocessor symbols.

• User-defined preprocessor symbols defined using a compiler option

  In addition to defining your own preprocessor symbols using the #define directive, you can also use the option -D, see -D.

• Predefined preprocessor macro symbols

  Use the option ‑‑predef_macros to see the predefined preprocessor macro symbols and their values for a specific command line. For more information, see ‑‑predef_macros.

• Preprocessor extensions

  There are several preprocessor extensions, for example, many pragma directives. For more information, see Pragma directives. For information about other extensions related to the preprocessor, see Descriptions of miscellaneous preprocessor extensions.

• Preprocessor output

  Use the option ‑‑preprocess to direct preprocessor output to a named file, see ‑‑preprocess.