[Rd] Minor feature request: Let 'R CMD co*nfig' tell me where the INCLDIR is

[Dirk Eddelbuettel]

On Debian / Ubuntu / ... we have [1] 

	edd at ron:~> R CMD config --cppflags
	-I/usr/share/R/include
	edd at ron:~>   

but I seem to have no way to learn 'just' the /usr/share/R/include part from
R CMD config.  It would be nice if something like

	R CMD config R_INCL_DIR 

could be added as we do have 'LIBnn'. Obviously, this is nothing we need now
before 2.8.0.  But if it could get added to R-devel, I'd appreciate it.  

[ The context is that 'R CMD INSTALL' does fewer things than a few of us
desired (as per a thread a few months ago) but seemingly nobody with the
magic powers to change this feels the same way. ]

Dirk

[1] Old and boring story of show 'arch-independent' files like headers ended
up in /usr/share omitted here.

-- 
Three out of two people have difficulties with fractions.