[Rd] could not find function "anyNA" when building tools package in R 3.1.1

[Benjamin Tyner]

I figured out what I did wrong. The end of my $LDFLAGS contained
"-Wl,-rpath,/path/to/an/old/R/installation/lib64/R/lib" (which predated
anyNA) and I was also using --enable-R-shlib, so possibly related to
PR#15790 (I say possibly, because I was not using "make install-libR").