cmake HAVE_DIRENT examples

mmontag/chip-player-js libxmp/cmake/libxmp-checks.cmake :158 

check_symbol_exists(opendir "dirent.h" HAVE_DIRENT)

mmontag/chip-player-js libxmp/cmake/libxmp-checks.cmake :162 

add_definitions(-DHAVE_DIRENT=1)

glKarin/com.n0n3m4.diii4a Q3E/src/main/jni/gzdoom/libraries/ZMusic/thirdparty/libxmp/CMakeLists.txt :101 

target_compile_definitions(libxmp PRIVATE -DHAVE_DIRENT=1 -DHAVE_UNISTD=1)

dpjudas/VkDoom libraries/ZMusic/thirdparty/libxmp/CMakeLists.txt :101 

target_compile_definitions(libxmp PRIVATE -DHAVE_DIRENT=1 -DHAVE_UNISTD=1)