/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations endian/BYTE_ORDER.c -o endian/BYTE_ORDER -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic
endian/BYTE_ORDER.c:1:10: fatal error: 'endian.h' file not found
#include <endian.h>
         ^~~~~~~~~~
1 error generated.