TASKING VX-toolset for ARM User Guide

Tool OptionsC compiler option: --undefine (-U)Menu entry1. Select C/C++ Compiler » PreprocessingThe Defined symbols box shows the symbols that are currently defined.2. To remove a defined symbol, select the symbol in the Defined symbols box and click on the Deletebutton.Command line syntax--undefine=macro_name-Umacro_nameDescriptionWith this option you can undefine an earlier defined macro as with #undef. This option is for exampleuseful to undefine predefined macros.The following predefined ISO C standard macros cannot be undefined:__FILE____LINE____TIME____DATE____STDC__current source filenamecurrent source line number (int type)hh:mm:ssMmm dd yyyylevel of ANSI standardExampleTo undefine the predefined macro __TASKING__:carm --undefine=__TASKING__ test.cRelated informationC compiler option --define (Define preprocessor macro)Section 1.8, Predefined Preprocessor Macros361