IAR Embedded Workbench for RL78 5.20IAR C/C++ DevelopmentThe preprocessorDescription of predefined preprocessor symbols__STDC____STDC__In this section: DescriptionAn integer that is set to 1, which means the compiler adheres to Standard C. This symbol can be tested with #ifdef to detect whether the compiler in use adheres to Standard C.This symbol is required by Standard C.