message: build: Check for 128 bit integer support
  Used in MuHash3072 implementation.
diff: @@ -755,6 +755,9 @@ if test x$use_lcov_branch != xno; then
  AC_SUBST(LCOV_OPTS, "$LCOV_OPTS --rc lcov_branch_coverage=1")
  fi
  +dnl Check for __int128
  +AC_CHECK_TYPES([__int128])
  +
  dnl Check for endianness
  AC_C_BIGENDIAN
  