On Wed, 17 May 2006, Bill Dunlap wrote: > On Wed, 17 May 2006, Martin Maechler wrote: > >>>>>>> "TL" == Thomas Lumley <[EMAIL PROTECTED]> >>>>>>> on Tue, 16 May 2006 10:15:11 -0700 (PDT) writes: >> >> TL> On Tue, 16 May 2006, Prof Brian Ripley wrote: >> >> It is possible to do things like >> >> >> >> env PKG_LIB="-L/opt/foo/lib -lbar" R CMD SHLIB *.c >> >> >> >> to add libraries to the creation of a shared object, but >> >> I have from time to time wondered if we should allow >> >> >> >> R CMD SHLIB *.c -L/opt/foo/lib -lbar >> >> >> >> not least as users seems to expect it to work. It looks >> >> simple to do (at least under Unix) if we pass -L* -l* *.a >> >> directly to the link command. >> >> >> >> Would this be worthwhile? >> >> TL> Yes. >> >> TL> My only reservation is that users may then expect all >> TL> compiler/linker flags to work, not just -L/-l >> >> I had exactly the same thought. >> >> Maybe Brian's proposal can be extended into >> >> "all switches that are not recognized by 'R CMD SHLIB' are >> passed to compiler / linker ...." >> >> hmm, or maybe not, since the question quickly become *which* are >> passed to compiler and which to linker (and which to both ?) ... > > I'd rather have SHLIB complain if it sees a -flag > that SHLIB doesn't recognize. Otherwise we get > portability problems. E.g., when using the Microsoft > C compiler and linker a SHLIB that knows about the > -l and -L flags can translate > -lfoo -L/dir/subdir > into LDFLAGS that link.exe knows about: > foo.lib /libpath:\dir\subdir > > If you need other linker flags, could they be in compiler/platform- > specific Makevars-<compiler/platform>? I think other > ones are not very common.
In R, we are not dealing with such compilers/linkers (fortunately). Given that there are plenty of ways to hang oneself here, I do not want to be unduly restrictive as to what one can pass. (All the autoconf etc mechanisms assume flags like -L and -l, and also that some reordering is done by the frontends.) > ---------------------------------------------------------------------------- > Bill Dunlap > Insightful Corporation > bill at insightful dot com > 360-428-8146 > > "All statements in this message represent the opinions of the author and do > not necessarily reflect Insightful Corporation policy or position." > > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
