stdout (GNU Gnulib)

Gnulib module: —

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

stdout is created in 32-bit mode instead of 64-bit mode: Cygwin 1.5.x. One workaround is to use freopen(NULL, "w", stdout) on Cygwin 1.5.21 or newer. Another is to use the gnulib ftello module and do ftello(stdout).
POSIX states that a setuid application can guarantee that fd 1 is open, but some systems guarantee this even for non-setuid programs. If an application is executed with fd 1 closed, use of stdout can affect an unrelated file that happened to be assigned to fd 1. The gnulib xstdopen or the *-safer modules may be used to guarantee that fd 1 stays reserved for stdout.