I am working on compiling a simple openGL program in Xcode on my M1 Mac running Monterey 12.2.1. The build succeeds, but I get this nasty error
2022-04-05 09:54:18.959203-0500 opengl[24908:835152] [default] error finding potential wrapper bundle for node <FSNode 0x100a09910> { isDir = ?, path = '/Users/liamwhite/Library/Developer/Xcode/DerivedData/opengl-awawpgevgzpjofbrfmzvucbfrzpp/Build/Products/Debug' }: Error Domain=NSOSStatusErrorDomain Code=-10811 "kLSNotAnApplicationErr: Item needs to be an application, but is not" UserInfo={_LSLine=1579, _LSFunction=wrapperBundleNodeForWrappedNode}
2022-04-05 09:54:18.959276-0500 opengl[24908:835152] [default] error finding potential wrapper bundle for node <FSNode 0x100a09910> { isDir = ?, path = '/Users/liamwhite/Library/Developer/Xcode/DerivedData/opengl-awawpgevgzpjofbrfmzvucbfrzpp/Build/Products/Debug' }: Error Domain=NSOSStatusErrorDomain Code=-10811 "kLSNotAnApplicationErr: Item needs to be an application, but is not" UserInfo={_LSLine=1579, _LSFunction=wrapperBundleNodeForWrappedNode}
2022-04-05 09:54:18.959308-0500 opengl[24908:835152] [default] error finding potential wrapper bundle for node <FSNode 0x100a09910> { isDir = ?, path = '/Users/liamwhite/Library/Developer/Xcode/DerivedData/opengl-awawpgevgzpjofbrfmzvucbfrzpp/Build/Products/Debug' }: Error Domain=NSOSStatusErrorDomain Code=-10811 "kLSNotAnApplicationErr: Item needs to be an application, but is not" UserInfo={_LSLine=1579, _LSFunction=wrapperBundleNodeForWrappedNode}
2022-04-05 09:54:19.019242-0500 opengl[24908:835152] [default] error finding potential wrapper bundle for node <FSNode 0x100a09910> { isDir = ?, path = '/Users/liamwhite/Library/Developer/Xcode/DerivedData/opengl-awawpgevgzpjofbrfmzvucbfrzpp/Build/Products/Debug' }: Error Domain=NSOSStatusErrorDomain Code=-10811 "kLSNotAnApplicationErr: Item needs to be an application, but is not" UserInfo={_LSLine=1579, _LSFunction=wrapperBundleNodeForWrappedNode}
2022-04-05 09:54:19.054172-0500 opengl[24908:835152] Metal API Validation Enabled
Program ended with exit code: 0
A potential fix is proposed in this SO post, but I am new to Xcode and the answer is too vague for me.
I expect a window to pop up and display a simple triangle. Instead I see my system attempt to open a window (for a fraction of a second) before quitting the window and giving me the above error.
Below is my code, if it is of any consequence:
#include <iostream>
#include <string>
#define GLEW_STATIC
#include <GL/glew.h>
#include <GLFW/glfw3.h>
static unsigned int CompileShader(unsigned int type, const std::string& source)
{
unsigned int id = glCreateShader(type);
const char* src = source.c_str();
glShaderSource(id, 1, &src, nullptr);
glCompileShader(id);
int result;
glGetShaderiv(id, GL_COMPILE_STATUS, &result);
if(!result)
{
int length;
glGetShaderiv(id, GL_INFO_LOG_LENGTH, &length);
char* message = static_cast<char*>(alloca(length * sizeof(char))); // alloca is from C. it allows dynamic stack allocation!
glGetShaderInfoLog(id, length, &length, message);
std::cout << "Failed to compile " << (type == GL_VERTEX_SHADER ? "vertex" : "fragment") << " shader" << std::endl;
std::cout << message << std::endl;
return 0;
}
return id;
}
static unsigned int CreateShader(const std::string& vertexShader, const std::string& fragmentShader)
{
unsigned int program = glCreateProgram();
unsigned int vs = CompileShader(GL_VERTEX_SHADER, vertexShader);
unsigned int fs = CompileShader(GL_FRAGMENT_SHADER, fragmentShader);
glAttachShader(program, vs);
glAttachShader(program, fs);
glLinkProgram(program);
glValidateProgram(program);
glDeleteShader(vs);
glDeleteShader(fs);
return program;
}
int main()
{
GLFWwindow* window;
/* Initialize the library */
if (!glfwInit())
return -1;
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
/* Create a windowed mode window and its OpenGL context */
window = glfwCreateWindow(640, 480, "", NULL, NULL);
if (!window)
{
glfwTerminate();
return -1;
}
/* Make the window's context current */
glfwMakeContextCurrent(window);
if(!glewInit())
return 0;
float positions[6] = {
-0.5f, -0.5f,
0.0f, 0.5f,
0.5f, -0.5f
};
unsigned int vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
unsigned int buffer;
glGenBuffers(1, &buffer);
glBindBuffer(GL_ARRAY_BUFFER, buffer);
glBufferData(GL_ARRAY_BUFFER, 6 * sizeof(float), positions, GL_STATIC_DRAW);
// Below is specifying the layout of our buffer (positions, above)
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(float) * 2, 0);
std::string vertexShader =
"#version 330 core\n"
"layout(location = 0) in vec4 position;\n"
"void main()\n"
"{\n"
"gl_Position = position;\n"
"}\n";
std::string fragmentShader =
"#version 330 core\n"
"layout(location = 0) out vec4 color;\n"
"void main()\n"
"{\n"
"color = vec4(1.0, 0.0, 0.0, 0.0, 1.0);\n"
"}\n";
unsigned int shader = CreateShader(vertexShader, fragmentShader);
glUseProgram(shader);
/* Loop until the user closes the window */
while (!glfwWindowShouldClose(window))
{
/* Render here */
glClear(GL_COLOR_BUFFER_BIT);
glDrawArrays(GL_TRIANGLES, 0, 3);
/* Swap front and back buffers */
glfwSwapBuffers(window);
/* Poll for and process events */
glfwPollEvents();
}
glfwTerminate();
return 0;
}