cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations limits/PIPE_BUF.c -o limits/PIPE_BUF -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
limits/PIPE_BUF.c:4:2: error: #error "PIPE_BUF is not defined"
    4 | #error "PIPE_BUF is not defined"
      |  ^~~~~