* bignum.c (GMP_BIG2STR_DIGITS): New constant.
  (big2str_gmp): New function.
  (rb_big2str1): Use big2str_gmp for big bignums.

* internal.h (rb_big2str_gmp): Declared.

* ext/-test-/bignum/big2str.c (big2str_gmp): New method.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42762 b2dd03c8-39d4-4d8f-98ff-823fe69b080e