hello_driver.cpp - "no mapping for imported function"

[mikelik]

When I compile and run hello_driver.cpp and removing memset from the example I get the error that: no mapping for imported function for at least 3 functions:

• set_blockchain_parameters_packed
• get_blockchain_parameters_packed
• set_proposed_producers
• get_active_producers

Exception is thrown from eosio/vm/host_function.hpp:463.

Used leap v3.2.3, CDT v3.2.0.

Example output if I remove try catch from hello_driver.cpp:

mikel@msi:~/repo/eos-vm/build/tools$  ./hello-driver 1 2 3
terminate called after throwing an instance of 'eosio::vm::wasm_link_exception'
  what():  wasm linked function failure
Aborted (core dumped)

[mikelik]

@larryk85 created a workaround here: https://github.com/larryk85/examples-for-eos-vm

Basically, above functions are implemented and mapped in the example contract.
In the long term, we need to fix the above issue, so the user doesn't have to map those functions.

This issue should be solved when AntelopeIO/cdt#189 will be done.