nhmall 1a0ee44760 unique temp files for makedefs invocations (GitHub issue #391) ...

As reported in https://github.com/NetHack/NetHack/issues/391
if make was invoked with -j, makedefs instances could end up running in
parallel and could trample on each other's grep.tmp tempory files.

Default to using mkstemp(); allow a port runtime library implementation
that lacks mkstemp() to define HAS_NO_MKSTEMP to revert to the old behaviour.

Provide a work-alike mkstemp() implementation for windows Visual Studio build
in mdlib.c so there is no requirement to define HAS_NO_MKSTEMP there.

Fixes #391

2020-09-22 09:03:15 -04:00

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