cmake HAVE__FILENO examples

nih-at/libzip CMakeLists.txt :105 

check_function_exists(_fileno HAVE__FILENO)

flyinghead/flycast core/deps/libzip/CMakeLists.txt :98 

check_function_exists(_fileno HAVE__FILENO)

librsync/librsync CMakeLists.txt :99 

check_function_exists ( _fileno HAVE__FILENO )

simongog/sdsl libdivsufsort-2.0.1/include/CMakeLists.txt :35 

check_symbol_exists("_fileno" "stdio.h" HAVE__FILENO)