[Rd] Makevars and Makeconf sequencing

[Ross Boylan]

http://cran.r-project.org/doc/manuals/R-exts.html#Configure-and-cleanup
near the start of 1.2.1 Using Makevars says

> There are some macros which are set whilst configuring the building of
> R itself and are stored in R_HOME/etcR_ARCH/Makeconf. That makefile is
> included as a Makefile after Makevars[.win], and the macros it defines
> can be used in macro assignments and make command lines in the latter.
> 
I'm confused.  If Makeconf is included after Makevars, then how can
Makevars use macros defined in Makeconf?

Or is the meaning only that a variable definition in Makeconf can be
overridden in Makevars?

Ross Boylan