message: Add ethash interface paths
diff: @@ -663,6 +663,13 @@ libbitcoin_common_a_SOURCES = \
  cpp-ethereum/utils/json_spirit/json_spirit_value.h \
  cpp-ethereum/utils/json_spirit/json_spirit_writer.h \
  cpp-ethereum/utils/json_spirit/json_spirit_writer_template.h \
  + cpp-ethereum/ethash/include/ethash/ethash.h \
  + cpp-ethereum/ethash/include/ethash/ethash.hpp \
  + cpp-ethereum/ethash/include/ethash/hash_types.h \
  + cpp-ethereum/ethash/include/ethash/hash_types.hpp \
  + cpp-ethereum/ethash/include/ethash/keccak.h \
  + cpp-ethereum/ethash/include/ethash/keccak.hpp \
  + cpp-ethereum/ethash/include/ethash/progpow.hpp \
  cpp-ethereum/ethash/lib/ethash/support/attributes.h \
  cpp-ethereum/ethash/lib/ethash/bit_manipulation.h \
  cpp-ethereum/ethash/lib/ethash/builtins.h \
  