g++ -std=c++0x main.cpp -pthread -o main -lglut -lGL - this is how the script that I compile my code looks like.

I get an error when starting the program

terminate called after throwing an instance of std :: system_error what (): Enable multithreading to use std :: thread: Operation not permitted

if you compile g++ -std=c++0x main.cpp -pthread -o main -lglut (there is no option -lGL ), then multithreading works, but OpenGL is -lGL off, of course, so I compiled it to comment out everything related to opengl. It is necessary that both multithreading and OpenGL work simultaneously.

Code:

 #include <GL/glut.h> #include <thread> #include <iostream> float x=-0.5; using namespace std; void renderScene(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glBegin(GL_TRIANGLES); glVertex3f(-0.5,-0.5,0.0); glVertex3f(0.0,0.5,0.0); glVertex3f(0.5,-0.5,0.0); glEnd(); glRotatef(10,0,0,1); glutSwapBuffers(); } void t1() { while(x<1) { x=x+0.1; cout << x << endl; } } int main(int argc, char **argv) { thread thr(t1); thr.join(); glutInit(&argc, argv); glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA | GLUT_MULTISAMPLE); glutInitWindowPosition(100,100); glutInitWindowSize(400,400); glutCreateWindow("ss"); glEnable(GL_MULTISAMPLE); glutDisplayFunc(renderScene); glutMainLoop(); return 0; }
  • Dear, the code must be given in the form of text, not pictures. - ermak0ff
  • It is not clear how it was compiled by the author at all. - dsnk

1 answer 1

And if you add this compilation option -D_REENTERANT ?

UPD: This is how it works, you forgot to connect the library -lpthread

 g++ -c ./test.cpp -std=c++0x -pthread -D_REENTERANT g++ -o ./test ./test.o -lglut -lGL -lm -lpthread -pthread
  • It is not the answer to the question. To leave your comments or ask the author to clarify, leave a comment to the appropriate post. - xaja
  • @xaja This is the author to decide. - dsnk
  • @xaja This is certainly not a definitive and comprehensive answer (even before editing), but still better than none. So do not delete it. - Kromster
  • @KromStern in the reply the sentence was (and is) interrogative. It is difficult to perceive as an answer. More like a cross between debugging and guessing. After editing - yes, another thing. - Regent
  • @Regent agree - Kromster