Systemc Error with the library

Question

I installed the SystemC library 2.3.1 using this tutorial.

I wrote this hello world example:

//hello.cpp
#include <systemc.h>

SC_MODULE (hello_world) {
  SC_CTOR (hello_world) {
  }

  void say_hello() {
    cout << ”Hello World systemc-2.3.0.\n”;
  }
};

int sc_main(int argc, char* argv[]) {
  hello_world hello(“HELLO”);
  hello.say_hello();
  return(0);
}

and compiled with this command:

export SYSTEMC_HOME=/usr/local/systemc230/
g++ -I. -I$SYSTEMC_HOME/include -L. -L$SYSTEMC_HOME/lib-linux -Wl,-rpath=$SYSTEMC_HOME/lib-linux -o hello hello.cpp -lsystemc -lm

When I compile the code, I got a error with the library:

In file included from hello.cpp:1:0:
/usr/local/systemc230/include/systemc.h:118:16: error: ‘std::gets’ has not been declared
     using std::gets;
                ^~~~

How can I solve this?

Did you enable C++11 as default flag for g++ ? (with an alias for example) — Guillaume, Jul 13 '16 at 13:24
Oh my god, thank you so much for this question! You probably save me several days... — Timur Fayzrakhmanov, Nov 15 '16 at 19:53

score 12 · Accepted Answer · edited May 23 '17 at 11:46

12

std::gets has been removed in C++11 (See What is gets() equivalent in C11?)

If you're building using C++11 flag (maybe with a g++ alias), you have to disable this line in systemc.h.

Replace

using std::gets;

with

#if defined(__cplusplus) && (__cplusplus < 201103L)
using std::gets;
#endif

edited May 23 '17 at 11:46

Community

1
1

answered Jul 13 '16 at 14:00

Guillaume

1,277
8
11

With this fix the error is now this: /usr/bin/ld: cannot find -lsystemc collect2: error: ld returned 1 exit status – Álison Venâncio Jul 13 '16 at 14:26
1

If you're working on a x64 Linux, you have to change g++ -I. -I$SYSTEMC_HOME/include -L. -L$SYSTEMC_HOME/lib-linux -Wl,-rpath=$SYSTEMC_HOME/lib-linux -o hello hello.cpp -lsystemc -lm to g++ -I. -I$SYSTEMC_HOME/include -L. -L$SYSTEMC_HOME/lib-linux64 -Wl,-rpath=$SYSTEMC_HOME/lib-linux64 -o hello hello.cpp -lsystemc -lm – Guillaume Jul 13 '16 at 14:31

score 2 · Answer 2 · answered Mar 20 '17 at 18:50

2

As guyguy333 mentioned, in new versions, g++ is an alias for C++11. so adding -std=c++98 would solve the problem. The compile command may like

$ g++ -std=c++98 -lsystemc -pthread main.cpp -o main

answered Mar 20 '17 at 18:50

Pazel1374

218
3
14

score 0 · Answer 3 · answered Jul 13 '16 at 13:30

0

You seem to have copy pased the code from webpage as it is. Please remember “” and "" are not the same thing. On line 8

cout << ”Hello World systemc-2.3.0.\n”;

replace it with

cout << "Hello World systemc-2.3.0.\n";

and on line 13

hello_world hello(“HELLO”);

replace it with

hello_world hello("HELLO");

And then execute the code again. GoodLuck.

answered Jul 13 '16 at 13:30

rkrara

442
1
6
17

I fixed this and the same error with the library still. – Álison Venâncio Jul 13 '16 at 13:57

Systemc Error with the library

3 Answers3