"symbol(s) not found for architecture x86_64" error when compiling a Qt project on Mac

SGaist

You can search the missing symbols on the Apple developer website or google you'll get the matching framework there.

Or take a look at the Irrlicht project files.

Donald Duck

@SGaist Thanks, I managed to get it to link almost all those symbols by adding the frameworks CoreFoundation, CoreGraphics and AppKit. But there are three that are still not working: std::_Rb_tree_decrement(std::_Rb_tree_node_base*), std::_Rb_tree_increment(std::_Rb_tree_node_base*) and std::_Rb_tree_insert_and_rebalance(bool, std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::_Rb_tree_node_base&). I searched on Google for those but didn't find anything. What framework should I add to get those to work?

SGaist

Can you check what standard library Irrlicht uses ? Libc++ or libstdc++ ?

Donald Duck

@SGaist I tried libstdc++ and then those three symbols worked but there were a lot of others that stopped working. How can I use both libc++ and libstdc++ in the same project?

SGaist

I'd rather go with building Irrlicht with libc++

Donald Duck

@SGaist I added the following code in the .pro file and it compiled but it crashed at runtime:

LIBS += -framework CoreFoundation
LIBS += -framework CoreGraphics
LIBS += -framework AppKit
LIBS += -stdlib=libstdc++
LIBS += -lc++

This is what I got in the terminal when running it:

Last login: Mon May 15 12:57:25 on ttys000
/Users/donaldduck/Documents/build-untitled/Mac/untitled.app/Contents/MacOS/untitled ; exit;
donalds-iMac:~ donaldduck$ /Users/donaldduck/Documents/build-untitled/Mac/untitled.app/Contents/MacOS/untitled ; exit;
Irrlicht Engine version 1.8.4
Darwin Kernel Version 15.6.0: Thu Jun 23 18:25:34 PDT 2016; root:xnu-3248.60.10~1/RELEASE_X86_64
No doublebuffering available.
Segmentation fault: 11
logout
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

[Process completed]

SGaist

You should run that through your debugger to see where exactly it's crashing.

Donald Duck

@SGaist According to the debugger, the thing that's crashing is const core::position2di& curr = ((CCursorControl *)CursorControl)->getPosition(); at line 1289 in the file CIrrDeviceMacOSX.mm. The part of my own code that calls this is the function irr::createDeviceEx, which is an Irrlicht function that I use in my code. Here is the complete code of the function that crashes (I added a comment at the line that crashes):

void CIrrDeviceMacOSX::storeMouseLocation()
{
	int x,y;

	if (Window != NULL)
	{
		NSPoint	p;
		p = [NSEvent mouseLocation];
		p = [Window convertScreenToBase:p];
		x = (int)p.x;
		y = DeviceHeight - (int)p.y;
	}
	else
	{
		CGEventRef ourEvent = CGEventCreate(NULL);
		CGPoint point = CGEventGetLocation(ourEvent);
		CFRelease(ourEvent);

		x = (int)point.x;
		y = (int)point.y;

		const core::position2di& curr = ((CCursorControl *)CursorControl)->getPosition();    //This is the line that crashes
		if (curr.X != x || curr.Y != y)
		{
			// In fullscreen mode, events are not sent regularly so rely on polling
			irr::SEvent ievent;
			ievent.EventType = irr::EET_MOUSE_INPUT_EVENT;
			ievent.MouseInput.Event = irr::EMIE_MOUSE_MOVED;
			ievent.MouseInput.X = x;
			ievent.MouseInput.Y = y;
			postEventFromUser(ievent);
		}
	}

	((CCursorControl *)CursorControl)->updateInternalCursorPosition(x,y);
}

jsulm

@Donald-Duck Most probably CursorControl is null pointer or dangling pointer. But I don't know why. Maybe you're doing something wrong in your code?

Donald Duck

@jsulm That's not my code, it's Irrlicht's code. Irrlicht is a library that I'm using. I don't think there is anything wrong in my own code since it compiles and runs just fine on Windows and Linux.

SGaist

Hence my suggestion to re-build Irrlicht against the same C++ library as Qt.

jsulm

@Donald-Duck said in "symbol(s) not found for architecture x86_64" error when compiling a Qt project on Mac:

I don't think there is anything wrong in my own code since it compiles and runs just fine on Windows and Linux

From my own experience I know that such assumptions are often wrong :-)
But you should follow what @SGaist suggested.

Donald Duck

@SGaist I tried rebuilding libIrrlicht.a with libc++ and without adding LIBS += -stdlib=libc++ and LIBS += -lc++ to my .pro file and it compiled and crashed just like first. It crashed at exactly the same place with exactly the same error.

Donald Duck

@jsulm I tested to see if the problem was in my code or in Irrlicht by copy-pasting a code from an Irrlicht tutorial that I know is correct into a new project and it crashed just like in my project. So the problem isn't in my code but in the Irrlicht library.

SGaist

To be sure we're on the same page, you are calling irr::createDeviceEx and this crashes, right ?

Donald Duck

@SGaist Yes.

SGaist

Since you are building Irrlicht anyway, I'd add some checks for CursorControl to see whether the pointer is null or just invalid.

Donald Duck

@SGaist I checked and the pointer is null.

SGaist

As a quick workaround to be able to run your application, add an if around the code using that variable.

The more involved method would be to find why it's null.

Donald Duck

@SGaist said in "symbol(s) not found for architecture x86_64" error when compiling a Qt project on Mac:

The more involved method would be to find why it's null.

I've posted a question on the Irrlicht forum to find out why it's null: http://irrlicht.sourceforge.net/forum/viewtopic.php?f=7&t=51856&p=301630