Another case of -1.0 correlation of random effects

Ben Bolker wrote:

?In that case, just go to http://r-forge.r-project.org/scm/?group_id=60
and follow the instructions:

svn checkout svn://svn.r-forge.r-project.org/svnroot/lme4

then navigate to the lme4a directory and build/install it ...

It's not my day. ?I go to the directory where the lme4a tree is located and
type "R CMD build lme4a" and get an error when the process gets to:

g++ -I/usr/local/lib/R/include ?-I/usr/local/include
-I"/usr/local/lib/R/library/Matrix/include"
-I"/usr/local/lib/R/library/Rcpp/include" ? -fpic ?-g -O2 -c glmFamily.cpp
-o glmFamily.o

In file included from glmFamily.cpp:1:
glmFamily.h:5:18: error: Rcpp.h: No such file or directory
In file included from glmFamily.cpp:1:
[errors continue]

I looked at lme4a/src/glmFamily.h and find

#include <Rcpp.h>
#include <Rmath.h>

Now, I have both of these files in my installation, but not in the locations
referenced with the -I switches. ?My Rcpp.h is found in
/usr/local/lib/R/library/Rcpp/lib (not include) and my Rmath.h is
found in /usr/local/lib/R/include which doesn't even show up in an -I
switch.

So, I don't know how these -I switches get generated, but there is a problem
somewhere, either with my installation or something else.

My installation was a standard build (configure; make; make install).

Yes, I fully understand what "unstable" means. ?Hopefully these errors are
helpful.