cgal {
  DEFINES += ENABLE_CGAL

  # Optionally specify location of CGAL using the 
  # CGALDIR env. variable
  CGAL_DIR = $$(CGALDIR)
  !isEmpty(CGAL_DIR) {
    QMAKE_INCDIR += $$CGAL_DIR/include
    QMAKE_LIBDIR += $$CGAL_DIR/lib
    message("CGAL location: $$CGAL_DIR")
  }

  CONFIG(mingw-cross-env) {
    LIBS += -lgmp -lmpfr -lCGAL
    QMAKE_CXXFLAGS += -frounding-math 
  } else {
    win* {
      *-g++* { 
        QMAKE_CXXFLAGS += -frounding-math 
      }
    } else {
      QMAKE_CXXFLAGS += -frounding-math 
    }
    LIBS += -lCGAL -lmpfr -lgmp
  }

  *clang* {
    QMAKE_CXXFLAGS -= -frounding-math
  }
}