| ||||
| Home Products Download Events Support | ||||
Technical Support
On-Line Manuals
CARM User's Guide
CARM Introduction Compiling Programs Language Extensions 
Preprocessor Header Files 
How #include Works Including Files Once Only Macros Simple Macros Complex Macros Macro Operators Stringize (#) Token Pasting (##) Defined Predefined Macros Undefining and Redefining Macro Caveats Conditional Compilation Preprocessor Directives #pragma #include #define #undef #if #ifdef #ifndef #elif #else #endif #line #error #warning #message Advanced Programming Error Messages Library Reference Appendix#undef
The #undef directive un-defines a macro name.
#undef macro-name
#undef causes the previously defined macro macro-name to no longer be defined as a macro. If macro-name is not defined, #undef is ignored. Predefined macros are not affected by #undef.
| Contact Site Map Press Privacy | Copyright © 2012 ARM Ltd and ARM Germany GmbH. All rights reserved. |
