I am not sure if this is due to running on another computer, or upgrading from version 1.7.1 to 1.7.3, but the build system is now very slow indeed. Even make clean takes surprisingly long - it takes 14 minutes the second time you run it (i.e. when there is nothing to clean).
I looked with “ps x” what was going on, and it looks like the build system is spending most of its time doing
icc —version 2>&1
icpc —version 2>&1
ifort —version 2>&1
It looks like it runs these three commands hundreds of times when I do "make clean”. Perhaps most make targets do this as a sanity check, and then when make targets are chained this is repeated almost endlessly.