Native Development

[delcasda]

Hi,

anybody can explain how comes if I am including all box2D libraries I get undefined references for example for b2World but not for b2Vec2 or b2BodyDef as shown on screenshot?

Screenshot1

[dtomilovskiy]

So, you have box2d headers but you dont link box2d library to you project. There are a couple of things you need to do to make this work properly.

Go to your Properties->Project References tab. Add box2d as a reference, this will cause box2d to be built before your project is built.

Then go to Properties->C/C++ Build->Settings tab.

Under QCC Compiler->Preprocessor add :

"${workspace_loc:/box2d}"

Under QCC Linker->Libraries Library Paths(-L) box :

"${workspace_loc:/box2d/Device-Debug}"
"${workspace_loc:/box2d/arm/a-le-v7}"

And in Libraries(-l) box in the same tab add :

box2d

This should do the trick. And take a look at BelligerentBlocks sample on the github. It is a C++ project that uses box2d.

[gbeukeboom · Accepted solution]

Hi,

Not sure what in the environment may be causing this but try the following:

1) import the Box2D project to your workspace and build (looks like you've already done this)

2) Import the HelloWorld sample directly from the Box2D project

   a) File > Import > General > Existing Projects Into Workspace

   b) In the file explorer browse to the HelloWorld folder within the Box2D project and import

   c) Build

This will ensure everything it set up correctly. Let me know if you experience any further issues.

Cheers,

[cdamus]

Hi,

Since NDK 2.0 Beta 3, there is a new "Add Library" wizard that sets up all these details for you in one easy step. Just select the application project, hit Ctrl+Shift+L (Command+Shift+L on Mac), choose the "Library Project in the Workspace" option, then pick the box2D project and finish the wizard.

HTH,

Christian

[delcasda]

Hi Garett,

your solution works perfect on NDK 1.0 but on NDK 2.0 build is ok but run as fails with "

Packaging failed:1

Error: File or dir does not exist: C:\bbndk-2.0.0-beta3\target\target-override\armle-v7\usr\lib\libbps.so"

I am trying to add "C:\bbndk-2.0.0-beta3\target\qnx6\armle-v7\usr\lib" where I can see the file is but I am not really godd setting it up.

I keep trying.

Thanks

[dtomilovskiy]

Problem here is that you have a bar-descriptor tries to package libbps with the app. Go to your bar-descriptor.xml and remove this line:

<asset

path="${QNX_TARGET}\..\target-override\armle-v7\usr\lib\libbps.so.1"type="Qnx/Elf">lib/libbps.so.1</asset>

You dont need to do this in NDK2.0. Also, there is a 2.0 branch of samples on github.

[gbeukeboom]

Update: The above post dtomilovskiy explains this correctly, you can just remove reference to the libbps.so from the bar-descriptor file.

Regards,