diff -ur mpfr-4.0.1/src/mparam_h.in mpfr-src/src/mparam_h.in --- mpfr-4.0.1/src/mparam_h.in Tue Jan 09 21:30:58 2018 +++ mpfr-src/src/mparam_h.in Sat Feb 10 15:24:58 2018 @@ -32,6 +32,8 @@ for example with gcc -dM -E -xc /dev/null As of gcc 4.2, you can also use: -march=native or -mtune=native */ +#elif 1 /* no processor specific optimization for TeX Live */ +#define MPFR_TUNE_CASE "default" #elif defined (__tune_pentium4__) /* Threshold for Pentium 4 */ #define MPFR_TUNE_CASE "src/x86_64/pentium4/mparam.h" #include "x86_64/pentium4/mparam.h"