cc -pthread -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/_CS_V8_ENV.c -o unistd/_CS_V8_ENV -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lcrypt -latomic unistd/_CS_V8_ENV.c:2:17: error: ‘_CS_V8_ENV’ undeclared here (not in a function); did you mean ‘_CS_V7_ENV’? 2 | int const foo = _CS_V8_ENV; | ^~~~~~~~~~ | _CS_V7_ENV