f10929ae7c
The commit "Fix KWSys SystemTools build on cygwin with -mwin32" tried to restore the state of the _WIN32 definition that was broken by the commit "Optimize KWSys SystemTools::FileExists on Windows". It did so for the case of building with -mwin32 on cygwin, but since including <windows.h> defines _WIN32, it failed for the case of not using -mwin32. This commit restores the state of _WIN32 in all cases by undefining it after including <windows.h> if it was not defined beforehand.
KWSys provides a platform-independent API to many common system features that are implemented differently on every platform. This library is intended to be shared among many projects, so it has a configurable namespace. Each project should configure KWSys to use a namespace unique to itself. See comments in CMakeLists.txt for details. You are probably reading this file in the source tree of a surrounding project. In that case, see "../README.kwsys" for details of using KWSys in your project.