Home/ Questions/Q 8409947
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-10T00:03:11+00:00

Very simple code, cannot see why compiler throws an error about my use of

  • 0

Very simple code, cannot see why compiler throws an error about my use of omp atomic capture

// my_class.h

class my_class
{

my_class()
{ }

static int class_int;
static int get_next_int();

};

// my_class.cpp

int my_class::get_next_int()
{
   int next_int;
  #pragma omp atomic capture
  next_int = class_int++;

  return next_int;
}

Compiler error:

my_class.cpp: In static member function 'static int 
my_class::get_next_int()':

my_class.cpp:2069: error: expected end of line before 'capture'
my_class.cpp:2070: error: invalid operator for '#pragma omp atomic' before '=' token

Might it have something to do with static? I can’t imagine why…

If I use pragma omp critical instead, then it works fine (no compiler error).

PS I have #include <omp.h> in all .h and .cpp. And I link with -fopenmp , as usual

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The capture clause was introduced in OpenMP 3.1. You need a compliant compiler:

    • GCC since v4.7
    • Intel compilers since v10.1
    • Oracle Solaris Studio since v12.3
    • many other compilers except…
    • MSVC (all versions, including 2012), which does not support OpenMP versions higher than 2.0.

    GCC 4.4.5 does not support OpenMP 3.1. It only supports OpenMP 3.0.

    • 0