Here are some things to try:
A) Include the header. I am 90% certain this will work but since it doesn’t fail for me, I can’t tell.
Comment out all the lines including function calls to time(), and the block of output at the end where time variables are printed. These are just bookkeeping to let you know how long the clustering took to run; their loss won’t affect the results (just the output where it says how long it took). I am 100% certain this will work if you comment enough stuff out; it doesn’t look like you’ll lose any real functionality doing it.
C) Fiddle with the installation of your compiler until the problem goes away (um, not recommended)