GLchar error_log[1024] = {0};
glGetProgramInfoLog(v210_program_num, 1024, nullptr, error_log);
fprintf(stderr, "Error linking program: %s\n", error_log);
GLchar error_log[1024] = {0};
glGetProgramInfoLog(v210_program_num, 1024, nullptr, error_log);
fprintf(stderr, "Error linking program: %s\n", error_log);