tree 4ec3e0c3cd6df214b71b713f857c178e6ebc4568
parent beb4505311011130a7e54632137b0fbb5824cc9b
author Keir Mierle <mierle@gmail.com> 1361730944 -0800
committer Keir Mierle <mierle@gmail.com> 1361731203 -0800

Fix threading build on Windows.

On Windows, including the "windows.h" header defines an enormous number of
symbols; some of which are macros with common names. In particular, "ERROR" and
"min" and "max" get defined. This causes clashes when user code references
these names in a context other than the intended use in windows.h.

To deal with this, the Microsoft engineers added the ability to control the
definition of these symbols by adding extra defines. In particular, including
windows.h in the following way

  #define NOGDI
  #define NOMINMAX

will reduce the number of macros defined. This way they will not conflict with
other uses in Ceres. For example, numeric_limits<double>::max() is impossible
to call without defining NOMINMAX.

Change-Id: I166f5d3bb6dc0e2e4b2ebf800fb19e49206f7874