when does "make" re-read a Makefile?

[Torsten Mohr]

Hi,

when i use automatic dependency generation in a project
then "make" needs to read these dependencies in at some
point.  How does it know when to do that?

If as a first step in the make process some dependencies
were generated and they are needed for further rules,
then "make" needs to read them in.  Does it do that by
re-reading the complete Makefile or does it just re-evaluate
the include-commands?


Thanks for any hints,
Torsten.