ARROW-5700: [C++] Try to produce better errors on Windows#4724
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Using GetLastError() if possible may produce more precise diagnostics than errno, since typically one errno can map to several different Windows error codes.
wesm
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+1 Here's the Appveyor build https://ci.appveyor.com/project/pitrou/arrow/builds/25589674. I'll wait for MinGW to pass
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Using GetLastError() if possible may produce more precise diagnostics than errno, since typically one errno can map to several different Windows error codes.