x86_64-linux-mlibc-gcc -O2 -march=x86-64 -pipe -mtune=generic -pthread   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations mqueue/O_RDWR.c -o mqueue/O_RDWR -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lcrypt -lintl -liconv
mqueue/O_RDWR.c:4:2: error: #error "O_RDWR is not defined"
    4 | #error "O_RDWR is not defined"
      |  ^~~~~