Hello, I am trying to add a framework to my KMP library in order to use it in an iOS app. I get th...

# kotlin-native

[ZabGo]

Hello,

I am trying to add a framework to my KMP library in order to use it in an iOS app. I get the error message: Undefined symbols for architecture x86_64

I am not really sure about the right way to link this framework.

I tried to add the headers of this framework to compilerOpts as well but it did not change anything.

Is there anything I need to change or add in the def file or build.gradle?

For now the linkerOpts looks like that in my def file:

linkerOpts= \
 -F/absolute/path/to/MyFramework.framework \
 -framework AVFoundation \
 -framework Foundation \
 -framework CoreGraphics \
 -framework CoreVideo \
 -framework QuartzCore \
 -framework UIKit \
 -framework CoreLocation \
 -framework Security \
 -framework CFNetwork \
 -framework CoreMedia \
 -framework SystemConfiguration \
 -framework AudioToolbox

in my build.gradle

iosX64("ios") {
    binaries {
        framework('Shared'){
            linkerOpts "-F/absolute/path/to/MyFramework.framework"
        }
    }

    compilations.main {
        cinterops {
            myCinterop {
                linkerOpts "-F/absolute/path/to/MyFramework.framework"
            }
        }
    }

[Kris Wong]

i am assuming MyFramework.framework was not built for x86_64

[Kris Wong]

but the linker will tell you which symbols are missing

[ZabGo]

It is supposed to build for x86_64. The structure of the folder MyFramework.framework is as follow:

- MyFramework.framework
    - Headers
        - x86_64-iphonesimulator-gcc
        - x86-iphonesimulator-gcc
        - etc. with different architectures
   - a binary file without any extension

[ZabGo]

I wonder if my def file might be wrong. Is -F/absolute/path/to/MyFramework.framework the correct way to pass this framework to the linker as it is in my KMP project?
Or do I need to add the headers and the binary file somewhere?

[Kris Wong]

you do need to specify -framework to link it

[ZabGo]

I tried -F/absolute/path/to/MyFramework.framework -framework MyFramework but I get an error saying MyFramework not found
So I thought it was not the correct way to do it, was it?

[ZabGo]

Or is it just -F/absolute/path/to/MyFramework.framework -framework ?

[ZabGo]

never tried this one yet

[Kris Wong]

-F/absolute/path/to/ -framework MyFramework

[Kris Wong]

the same as linking any library

[ZabGo]

I tried that but I got the error framework not found I'll give it a try again.

[ZabGo]

Forget my last message I understand now. The path is the one of the parent's folder not the folder of the framework itself?

[Kris Wong]

the path that the framework resides in

[Kris Wong]

when you link libfoo.a, you don't specify -Lpath/to/libfoo.a

[ZabGo]

Yes indeed. Make sense

[ZabGo]

Thank you very much!!! It's working now. I can build and run the app.

I think because MyFramework.framework is a folder I thought that I had to pass the path to the folder MyFramework.framework and did not think about passing the path to the parent's folder