IAR Embedded Workbench for RX 5.20IAR C/C++ DevelopmentThe preprocessorDescription of predefined preprocessor symbols__LITTLE_ENDIAN____LITTLE_ENDIAN__In this section: DescriptionAn integer that reflects the setting of the compiler option ‑‑endian and is defined to 1 when the byte order for data is little-endian. The symbol is defined to 0 when the byte order for data is big-endian.