What are export_includes and import_includes files when building Android

Question

Can't find any useful info on this using Google.

All I found are people asking how to resolve compilation errors such as

make: *** No rule to make target `/home/joe/[ubuntuTouch]/out/target/product/jewel/obj/SHARED_LIBRARIES/libril_intermediates/export_includes', needed by `/home/joe/[ubuntuTouch]/out/target/product/jewel/obj/EXECUTABLES/rild_intermediates/import_includes'.  Stop.

Answer 1

In case anyone does come here with that compilation error, I had this problem when I switched to a different terminal window and forgot to call lunch. (I had called source build/envsetup.sh).