RUBY_DIGEST_API_VERSION   15 ext/digest/md5/md5init.c     RUBY_DIGEST_API_VERSION,
RUBY_DIGEST_API_VERSION   13 ext/digest/rmd160/rmd160init.c     RUBY_DIGEST_API_VERSION,
RUBY_DIGEST_API_VERSION   15 ext/digest/sha1/sha1init.c     RUBY_DIGEST_API_VERSION,
RUBY_DIGEST_API_VERSION   18 ext/digest/sha2/sha2init.c     RUBY_DIGEST_API_VERSION, \