[Rd] How to change name of .so/.dll

Matthew Dowle mdowle at mdowle.plus.com
Wed Jun 13 00:39:38 CEST 2012

Matthew Dowle wrote :
> Hi,
> I've added R_init_data_table to the "data.table" package (which has a dot
> in its name). This works well in R 2.15.0, because of this from the
> Writing R Extensions manual :
> " Note that there are some implicit restrictions on this mechanism as the
> basename of the DLL needs to be both a valid file name and valid as part
> of a C entry point (e.g. it cannot contain ‘.’): for portable code it is
> best to confine DLL names to be ASCII alphanumeric plus underscore. As
> from R 2.15.0, if entry point R_init_lib is not found it is also looked
> for with ‘.’ replaced by ‘_’. "
> But how do I confine the DLL name, is it an option in Makevars?
> The name of the shared object is currently "data.table.so" (data.table.dll
> on Windows).  Is it possible to change the file name to "datatable.so"
> (and datatable.dll) in a portable way so that R_init_datatable works
> (without a dot), and, without Depend-ing on R>=2.15.0 and without changing
> the name of the package?

Just to clarify, I'm aware R CMD SHLIB has the -o argument which can be
used create datatable.so instead of data.table.so. It's R CMD INSTALL
that's the problem as that seems to pass -o <pkg_name> to R CMD SHLIB.  I
found install.libs.R (added to R in 2.13.1), could that be used to create
datatable.so instead of data.table.so? Or a line I could add to


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