* .gitignore: Ignore cross/etc/DOC. * configure.ac: Make the directory `cross/etc'. * cross/Makefile.in (CLEAN_SUBDIRS): Clean files inside `etc' as well. * java/Makefile.in (install_temp): Copy cross/etc/DOC to the package if it is available. * src/Makefile.in (SOME_MACHINE_OBJECTS): Add androidselect.c, sfntfont-android.c and sfntfont.c. (libemacs.so): Depend on $(etc)/DOC.
This directory holds Makefiles and other required assets to build an Emacs binary independently for another toolchain. The directory ndk-build also contains an implementation of the Android `ndk-build' build system.