Building smart contract error: redefinition of 'time' as different kind of symbol typedef uint32_t time;

Question

I am pretty desperate at this point to search for hints on this issue, though I am pretty sure it's because I'm new to C++ include system. I am getting an error while trying to run a wasm executable that is a result of my project's compilation in Clion. I am trying to run simple contract and #include <eosiolib/eosio.hpp>

[100%] Linking LLVM bitcode executable products.bc
[100%] Generating textual assembly products.s
[100%] Generating WAST products.wast
[100%] Generating products.wast.hpp
[100%] Generating WASM products.wasm
[100%] Built target products

I am able to build the project fine, but then receive errors below

../eosiolib/types.h:26:18: error: redefinition of 'time' as different kind of symbol
typedef uint32_t time;
                 ^
/usr/include/time.h:117:8: note: previous definition is here
time_t time(time_t *);
       ^

followed with

../eosiolib/print.h:86:26: error: unknown type name 'int128_t'
   void printi128( const int128_t* value );
                         ^
../eosiolib/print.h:99:27: error: unknown type name 'uint128_t'
   void printui128( const uint128_t* value );

I have tried solutions from here and some forum posts, but nothing helped yet.

UPDATE Project Structure Main CMakeLists.txt My smart contract subfolder CMakeLists.txt I wonder if someone might have an empty compilable project for CLion? Those I found were outdated and won't compile

The error below shows that time in lib is conflicting with time in /usr/include. I am not including it anywhere I believe? How do I check where is it included from?

/Users/lonkly/CLionProjects/clarity_demo2/eos_contracts/hello/hello.cpp:1:

In file included from /Users/lonkly/CLionProjects/clarity_demo2/eos_contracts/hello/../eosiolib/eosio.hpp:6:
In file included from /Users/lonkly/CLionProjects/clarity_demo2/eos_contracts/hello/../eosiolib/types.hpp:6:
/Users/lonkly/CLionProjects/clarity_demo2/eos_contracts/hello/../eosiolib/types.h:25:18: error: redefinition of 'time' as different kind of symbol

Full copypaste of error log here

Answer 1

The problem is that the code you have written is somehow accessing both the standard C++ definition of time (from /usr/include/time.h) and also the EOS.IO definition of time (from ../eosiolib/types.h).

All I can think is that something in the building of the system has conflicting include paths. Unless you are doing someting like:

#include "time.h"

(which you shouldn't be doing)

Without seeing more code, I don't think I can help any more than that.

Answer 2

Try using uint64_t to store your time and current_time() defined in the wasm_interface.hpp to get the current time.

It's worth noting that some c++ functionality may not be available within the eos context, as the blockchain needs to be "replayable". Therefore, some functionality has either been removed or wrapped to ensure that the blockchain remains atomic.