CODEWITHSUNDEEP
c++objective-cxcodeeigen
Benoît Lahoz
Benoît Lahoz

Reputation: 1366

Problems compiling Eigen in Objective-C (not iPhone)

I'm trying to compile the Eigen 3 library in an Objective-C++ XCode project (for Mac OSX), and it outputs more than 200 errors, like if it was a linker error. I put a picture below to show the first errors output.

My project is using Objective-C and C++ (a Bullet Physics implem actually) so I

but nothing worked...

The #import in my program file is working well, as I can see that XCode recognize my

Matrix4f eigenViewMatrix = Map<Matrix4f>(viewMatrix, 4, 4);

I guess there is a flag to add, but I can't find what and where. By the way, I'm using the LLVM GCC 4.2 compiler.

I would be really grateful to receive some help. Thank you.

enter image description here

EDIT

I enabled OpenMP and SSE in the project Build Settings, like in this post : http://forum.kde.org/viewtopic.php?f=74&t=98401

I can't find "auto-vectorization" though.

If I include the

#include <iostream>
#include <Core>
#include <Dense>

in the implementation file (.mm) I have less errors than if it is included in a global header file. The errors only concern Block.h and Memory.h now.

Upvotes: 2

Views: 757

Answers (1)

Beno&#238;t Lahoz
Beno&#238;t Lahoz

Reputation: 1366

Well, after empiric tests I finally found that Eigen headers calls had to be before everything.

In my Prefix Header (.pch) I had some calls, and so I finally change it like this : 

//
// Prefix header for all source files of the 'h[Oz] Bullet' target in the 'h[Oz] Bullet' project
//

#ifdef __OBJC__
#endif

#include <iostream>
#include <Core>
#include <Dense>

#import <Quartz/Quartz.h>
#import <OpenGL/CGLMacro.h>
#import <OpenGL/gluMacro.h>

Hope it'll help someone.

Upvotes: 2

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