FIND_PACKAGE(Qt5 COMPONENTS Core Xml OpenGL Gui Widgets)
IF(NOT Qt5_FOUND)
  MESSAGE("Qt5 not found. Install it and set Qt5_DIR accordingly")
  IF (WIN32)
    MESSAGE("  In Windows, Qt5_DIR should be something like C:/Qt/5.4/msvc2013_64_opengl/lib/cmake/Qt5")
  ENDIF()
ENDIF()

FIND_PATH(QGLVIEWER_INCLUDE_DIR qglviewer.h
    /usr/include/QGLViewer
    /opt/local/include/QGLViewer
    /usr/local/include/QGLViewer
    /sw/include/QGLViewer
    ENV QGLVIEWERROOT
  )

find_library(QGLVIEWER_LIBRARY_RELEASE
  NAMES qglviewer QGLViewer qglviewer-qt5 QGLViewer-qt5
  PATHS /usr/lib
        /usr/local/lib
        /opt/local/lib
        /sw/lib
        ENV QGLVIEWERROOT
        ENV LD_LIBRARY_PATH
        ENV LIBRARY_PATH
  PATH_SUFFIXES QGLViewer QGLViewer/release
)
find_library(QGLVIEWER_LIBRARY_DEBUG
  NAMES dqglviewer dQGLViewer dqglviewer-qt5 dQGLViewer-qt5 QGLViewerd2
  PATHS /usr/lib
        /usr/local/lib
        /opt/local/lib
        /sw/lib
        ENV QGLVIEWERROOT
        ENV LD_LIBRARY_PATH
        ENV LIBRARY_PATH
  PATH_SUFFIXES QGLViewer QGLViewer/debug
)

if(QGLVIEWER_LIBRARY_RELEASE)
  if(QGLVIEWER_LIBRARY_DEBUG)
    set(QGLVIEWER_LIBRARY optimized ${QGLVIEWER_LIBRARY_RELEASE} debug ${QGLVIEWER_LIBRARY_DEBUG})
  else()
    set(QGLVIEWER_LIBRARY ${QGLVIEWER_LIBRARY_RELEASE})
  endif()
endif()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(QGLVIEWER DEFAULT_MSG
  QGLVIEWER_INCLUDE_DIR QGLVIEWER_LIBRARY)