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jo.c: In function 'main':
jo.c:218:2: error: implicit declaration of function 'fileno' [-Werror=implicit-function-declaration]
int ttyin = isatty(fileno(stdin)), ttyout = isatty(fileno(stdout));
cc1: all warnings being treated as errors
This would fix it ... you could also make it a -D_POSIX_SOURCE of course.
@@ -1,3 +1,4 @@