cmake FreeGLUT examples

DIPlib/diplib CMakeLists.txt :113 

find_package(FreeGLUT)

plstcharles/litiv CMakeLists.txt :126 

find_package(FREEGLUT QUIET)

vectorgraphics/asymptote cmake-scripts/external-libs.cmake :197 

find_package(FreeGLUT CONFIG)

plumonito/dtslam CMakeLists.txt :13 

find_package(freeglut REQUIRED QUIET PATHS "${EP_PREFIX}")