IAR Embedded Workbench for RX 5.20IAR C/C++ DevelopmentCompiler optionsDescriptions of compiler options‑‑char_is_unsigned‑‑char_is_unsignedIn this section: Syntax‑‑char_is_unsigned DescriptionUse this option to make the compiler interpret the plain char type as unsigned. This is the default interpretation of the plain char type.CautionProject>Options>C/C++ Compiler>Language 2>Plain ‘char’ is