Comment on Generalizing Printf in CparentComments−nwellnhof9mofmemopen and open_memstream are both part of POSIX, so they're not restricted to GNU systems and can be used portably. fopencookie is a GNU extension, though.
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fmemopen and open_memstream are both part of POSIX, so they're not restricted to GNU systems and can be used portably. fopencookie is a GNU extension, though.