I just (apparently) figured out how to do the stuff described in Section 5.4.2 of Writing R Extensions. I put my test toy packages on github <https://github.com/cjgeyer/linkingTo> for anyone to copy. If anyone cares to read the README and the bits of code it links to and tell me anywhere I am wrong, I would be grateful.
But the main point of this e-mail is a complaint about that section of Writing R Extensions. It says (even in R-devel) "A CRAN example of the use of this mechanism is package lme4, which links to Matrix." but that does not appear to be true anymore. I cannot see any inclusion of headers from Matrix in lme4 nor any call to R_GetCCallable. I did find the file inst/include/Matrix_stubs.c in the Matrix package somewhat helpful (although mystifying at first). So this can be considered a documentation bug report (if I am correct). Do I need to do an official bugzilla one? Just a further check. lme4 (1.1-12) does not have Matrix in the LinkingTo field of its DESCRIPTION file, so headers from Matrix cannot be used. And grep R_Get *.[ch]* in the src directory of lme4 returns nothing. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel