How do I compile single- and multi-processor versions on SGI machines?
To compile MrBayes 3.1 on a Silicon Graphics machine (running IRIX or Linux) you need to use the -lm flag at the end of the command line when linking. A typical compile session would look like this: gcc -DUNIX_VERSION -O3 -c -o mb.o mb.c gcc -DUNIX_VERSION -O3 -c -o mcmc.o mcmc.c gcc -DUNIX_VERSION -O3 -c -o bayes.o bayes.c gcc -DUNIX_VERSION -O3 -c -o command.o command.c gcc -DUNIX_VERSION -O3 -c -o mbmath.o mbmath.c gcc -DUNIX_VERSION -O3 -c -o model.o model.c gcc -DUNIX_VERSION -O3 -c -o plot.o plot.c gcc -DUNIX_VERSION -O3 -c -o sump.o sump.c gcc -DUNIX_VERSION -O3 -c -o sumt.o sumt.c gcc -DUNIX_VERSION -O3 mb.o bayes.o command.o mbmath.o mcmc.o model.o plot.o sump.o sumt.o -o mb -lm (Options for turning on various warnings have been omitted here for clarity). The only difference from the standard Makefile is on the last line above, where the -lm flag is now at the end. Under IRIX the cc compiler could have been used instead. Under Linux you could have used the icc compiler. If you
