cmake HAVE_FDOPEN examples

InsightSoftwareConsortium/ITK Modules/ThirdParty/MINC/src/libminc/CMakeLists.txt :133 

CHECK_FUNCTION_EXISTS(fdopen   HAVE_FDOPEN)

shogun-toolbox/shogun src/shogun/CMakeLists.txt :223 

CHECK_CXX_SYMBOL_EXISTS(fdopen "stdio.h" HAVE_FDOPEN)