clang -O2   -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations errno/ENOTRECOVERABLE.c -o errno/ENOTRECOVERABLE -D_POSIX_C_SOURCE=202405L  -lm   -lintl
errno/ENOTRECOVERABLE.c:3:2: error: "ENOTRECOVERABLE is not defined"
#error "ENOTRECOVERABLE is not defined"
 ^
1 error generated.