Function not available for .Call using Rcpp.package.skeleton() and compileAttributes [closed]

问题

I am trying to follow closely the directions in the Rcpp package documentation, but I am getting the error

Error in .Call("MicroCreditLRVBR_TestJacobian", PACKAGE = "MicroCreditLRVBR") : 
  "MicroCreditLRVBR_TestJacobian" not available for .Call() for package "MicroCreditLRVBR"

The package framework was built with Rcpp.package.skeleton(). I copied in my R and C++ code, modified the Makevars to point to some code outside the package, updated the DESCRIPTION to link to RcppEigen, and ran compileAttributes(). I then ran R CMD build to create a .gz file and R CMD INSTALL to install it. It built and linked successfully, but terminated with the above error.

I can see that the function MicroCreditLRVBR_TestJacobian is indeed defined in RcppExports.cpp and RcppExports.R. I don't know why it is not available for .Call.

Note that NAMESPACE includes useDynLib(MicroCreditLRVBR) and exportPattern("^[[:alpha:]]+").

A public copy of the package in its current state is in this github repo. Any help would be appreciated.

回答1:

When you switched the name from:

MicroCreditLRVB

MicroCreditLRVBR

You forgot to modify the package name in the NAMESPACE file

e.g.

useDynLib(MicroCreditLRVB)

goes to:

useDynLib(MicroCreditLRVBR)

Also, remove lines 1-22 from microcredit_stan_lib.R. They should be put into a "demo" file found within the /inst.

Lastly, import boost headers using the BH and cut down on the absolute paths within the Makevars.

回答2:

The problem was resolved by removing the line

jac_test <- TestJacobian()

from the file microcredit_stan_lib.R.

For future reference, I had a C++ file in src/ that defined

// [[Rcpp::export]]
Rcpp::List TestJacobian() {
  ... do stuff ...
}

..and a library file R/microcredit_stan_lib.R that had a line in the outermost environment

jac_test <- TestJacobian()

By commenting out jac_test <- TestJacobian(), the problem was resolved. I'm not sure why.

来源：https://stackoverflow.com/questions/37336916/function-not-available-for-call-using-rcpp-package-skeleton-and-compileattrib

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c++

rcpp