This is R2.15.2 on Scientific Linux 6.3 64-bit with gcc 4.7.2: When attempting to build rMAT using: R source("http://bioconductor.org/biocLite.R") biocLite("rMAT") I get g++ -shared -L/usr/local/lib64 -o rMAT.so BARFileData.o BARFileWriter.o BARReader.o BARWriter.o BPMAPFileData.o BPMAPfunctions.o DeclareAll.o FileIO.o FileWriter.o NormalizeProbes.o -lgsl -lgslcblas -lm-lgomp -L/gpfs/apps/R/R-2.15.2_gcc/lib64/R/lib -lR /usr/bin/ld: cannot find -lm-lgomp - note that this is an exact copy-and-paste and the g++ line really does have ... -lgslcblas -lm-lgomp -L/gpfs/apps/R/R-2.15.2_gcc/lib64/R/lib ... with no space in -lm-lgomp which, as expected from this string, generates the failure /usr/bin/ld: cannot find -lm-lgomp Has anyone else seen this and worked around it? Thanks -- Paul Hatton High Performance Computing and Visualisation Specialist IT Services, The University of Birmingham Ph: 0121-414-3994 Mob: 07785-977340 Skype: P.S.Hatton [Service Manager, Birmingham Environment for Academic Research] [Also Technical Director, IBM Visual and Spatial Technology Centre]