----- Original Message ----- > From: "Kasper Daniel Hansen" <kasperdanielhan...@gmail.com> > To: "Greg Minshall" <minsh...@acm.org> > Cc: "r-devel" <r-devel@r-project.org> > Sent: Sunday, July 13, 2014 1:08:56 PM > Subject: Re: [Rd] how to list external dependencies (i.e., non-R packages)? > > Several packages in Bioconductor (and possibly CRAN) uses > SystemRequirements > in DESCRIPTION, but unless the user reads the DESCRIPTION file, this > is for > naught. Still useful to some people I think. >
This is not just for Bioconductor; The R-exts manual (Section 1.1.1) says: "Dependencies external to the R system should be listed in the ‘SystemRequirements’ field, possibly amplified in a separate README file." Dan > Best, > Kasper > > > On Sun, Jul 13, 2014 at 9:13 PM, Greg Minshall <minsh...@acm.org> > wrote: > > > hi. i'm working on a package which only works if one (or both) of > > two > > libraries (Imlib2 and MagickWand) exist on the machine on which the > > package is compiled and executed. as currently written, the > > program > > purposely generates an error at *compile* time if neither library > > is > > available (thinking the earlier the user is notified, the less > > frustrating). > > > > is there a way of specifying this dependency in, say, the > > DESCRIPTION > > file? (seems unlikely, as this is what the whole > > autotools/configure.ac > > framework is supposed to deal with.) > > > > or, should i take out the compile time error (maybe replace my > > #error > > with a #warning), and just generate at error at run time? (this > > will > > require me to figure out what that means for build tests/, but > > obviously > > some sort of hack is doable.) > > > > cheers, Greg > > > > ______________________________________________ > > R-devel@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-devel > > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
