/opt/IBM/openxlC/17.1.1/bin/ibm-clang -pthread -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations limits/POSIX_REC_XFER_ALIGN.c -o limits/POSIX_REC_XFER_ALIGN -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -latomic limits/POSIX_REC_XFER_ALIGN.c:5:2: error: "POSIX_REC_XFER_ALIGN is not defined" #error "POSIX_REC_XFER_ALIGN is not defined" ^ 1 error generated.