TOPDIR is install directory plus subdirectory.
tree3a3137d8cedf692e6d7caa52a844a0f59eae4c67
-rw-r--r-- 9788 Makefile
drwxr-xr-x - conf
-rw-r--r-- 3503 openembedded.mk
-rw-r--r-- 1323 setup-env