Does OS matter when compiling for iPhone?

Question

Hi,

I fairly new on iPhone development and I'm currently trying to add some static libraries to my project but I get the "Symbol(s) not found" error.

I've googled the issue and tried different solutions without any luck. The libraries are compiled on a PC and not on a Mac so my questions are:

Do I need to compile the code on a Mac? What tool(s) do I need to be able to compile them?

I have included the headers to the project. The code I'm trying to link to are written in c and are compiled for ARM GCC 4.2.

I get the following errorcode:

ld warning: in /Users/<>/Playground/Collage/libbaseapi.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/capseng.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/excodecs.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmautorama.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmclearshot.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmexif.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmextencoder.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmfacewarp.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmfxplugin.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmimageenhance.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmimagefusion.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmjpegsqueeze.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmjpegtools.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmphotoart.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmredaway.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmsemc.a, file is not of required architecture ld warning: in /Users/<>/Playground/Collage/fmspeedview.a, file is not of required architecture

Undefined symbols: "_caps_destroyBuffer", referenced from: -[CollageMainView drawRect:] in CollageMainView.o ld: symbol(s) not found collect2: ld returned 1 exit status "_caps_destroyBuffer", referenced from: -[CollageMainView drawRect:] in CollageMainView.o ld: symbol(s) not found collect2: ld returned 1 exit status Build failed (1 error)

BR, Andreas

Answer 1

You can't add custom (compiled) libraries to an iPhone application. You should always include the source code in your project.

Answer 2

You need to either add the header files for your libraries to your project, or if it's a missing framework, add it to the "frameworks" folder in Xcode.