add a makefile wrapper at /build/build_app that will be copied to ${DESTDIR}/usr...
drwxr-xr-x - bin
drwxr-xr-x - build
drwxr-xr-x - debian
drwxr-xr-x - doc
-rw-r--r-- 3491 makefile
drwxr-xr-x - src