To compile mpfrbench, simply do:

$ make mpfrbench

To run it:

$ ./mpfrbench

On a typical computer, it should take around 12 minutes. The final output
looks like (here on a Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz with
GCC 4.9.3, and --with-gmp-build=gmp-6.0.0), revision ef5f2c0:

GMP : 6.0.0  MPFR : 3.2.0-dev 
GMP compiler : gcc -std=gnu99
GMP flags    : -O2 -pedantic -fomit-frame-pointer -m64 -mtune=core2 -march=core2


        score for   mul :      1434798
        score for   add :      6419546
        score for   sub :      6228906
        score for   div :       698843
group score Arith   :      2516353

        score for  sqrt :       550492
        score for   exp :        26517
        score for   log :        20034
        score for   cos :        28853
        score for   sin :        23044
        score for  acos :         7639
        score for  asin :         8010
group score Special :        27501

global score :         1076