msys2 cgal

 $ pacman -Qe

mingw-w64-x86_64-cgal 4.9-1
mingw-w64-x86_64-cmake 3.7.0-1
mingw-w64-x86_64-freeglut 3.0.0-4
mingw-w64-x86_64-gcc 6.2.0-2
mingw-w64-x86_64-make 4.1.2351.a80a8b8-1
mingw-w64-x86_64-mesa 13.0.2-1
mingw-w64-x86_64-qt-creator 4.1.0-1
mingw-w64-x86_64-qt5 5.6.2-4


cmake -G "MinGW Makefiles"   -DCMAKE_MAKE_PROGRAM=mingw32-make  .

 "C:\msys64\home\li\examples\Core\CMakeFiles\delaunay.dir\flags.make"
CXX_DEFINES = -DCGAL_Core_EXPORTS -DCGAL_USE_GMP -DCGAL_USE_MPFR