[Issue 24315] dmd/cpreprocess.d:87: warning: the use of `tmpnam' is dangerous, better use `mkstemp'

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24315

--- Comment #6 from kdevel <kdevel at vogtner.de> ---
(In reply to Walter Bright from comment #5)
> It returns a file descriptor for an already opened file.

The descriptor is unused and can be safely closed (or the FILE* ptr fclosed
after using fdopen). Using mkstemp is how to create a named temporary file lege
artis in GNU/Linux [5].

The actual filename is in the writable template-buffer given as parameter to
mkstemp. The preprocessor will put its output into that file.

I was under the impression that not the POSIX but the Windows version could
pose
problems here?

[5] sec 2.2.2. (p. 7) of Ulrich Drepper: Defensive Programming for Red Hat
    Enterprise Linux (and What To Do If Something Goes Wrong)
    http://people.redhat.com/drepper/defprogramming.pdf

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