When I\'m compiling openvswitch-1.5.0, I\'ve encountered the following compile error:
gcc -Wstrict-prototypes -Wall -Wno-sign-compare -Wpointer-arith -
The same thing happened to me as I was installing the HPCC benchmark (includes HPL and a few other benchmarks). I added -lm to the compiler flags in my build script and then it successfully compiled.
-lm