> On November 19, 2010 07:58:40 am Marko Robnik-Šikonja wrote: > > I am a maintainer of the CORElearn package which uses OpenMP > > multithreading to speed up some computations. When producing a new > > release we tested the package with the latest R 2.12.0. On Linux the > > package works normally. On Windows we installed a recommended > version of Rtools (Rtools212) but the linker fails with the messages below. > [...] > > Suspecting that errors may be caused by a wrong underscore convention > > I experimented with the SYMPAT variable in etc/Makeconf, but without > > success. My guess is that gomp library provided with > > Rtools212 is using a different underscore convention as the rest of > > the gcc. Can you suggest some solution, please? > > On November 19, 2010 22:12 Davor Cubranic wrote: > The cause is that Rtools does not include libthread, which libgomp depends > on. I ran into the same problem as you (see the thread: > http://article.gmane.org/gmane.comp.lang.r.devel/25764/). It didn't look > like libthread will be allowed into RTools, so now we turn OpenMP off on > Windows. Please let me know if you figure out a better solution.
Thank you, Davor for your suggestion, as well as Prof Ripley for his explanation posted to r-windows list. I have discovered TDM MinGW toolchain http://tdm-gcc.tdragon.net/ which does contain pthreads in both 32 and 64 bit version of the package. Using Makevars.win below I can produce both 32 and 64 bit version of the package. ARCH_FLAG = -m32 ifeq ($(R_ARCH),/x64) ARCH_FLAG = -m64 endif PKG_CXXFLAGS = $(ARCH_FLAG) -fopenmp PKG_LIBS = $(ARCH_FLAG) -fopenmp As long as Rtools do not support openMP I will publish multithreaded Windows packages only on my website and diasble it on CRAN. Greetings, Marko ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
