Native Linking errors in xamarin

Question

I am try to compile my xamarin project today and suddenly i am getting these errors:

error MT5210: Native linking failed, undefined symbol: _mono_handle_global_vregs. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
error MT5210: Native linking failed, undefined symbol: _mono_inst_name. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
error MT5210: Native linking failed, undefined symbol: _mono_local_deadce. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
error MT5210: Native linking failed, undefined symbol: _mono_print_code. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
error MT5210: Native linking failed, undefined symbol: _mono_type_to_regmove. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
error MT5210: Native linking failed, undefined symbol: _type_to_eval_stack_type. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
error MT5202: Native linking failed. Please review the build log.

Can any one point me in any direction why these could be happening?

I have a Firebase iOS sdk added to the solution as binding project

Solution 1

It is Xamarin bug -> Watch here. You should remove from additional mtouch arguments "--gcc_flags -load_all" to be able to build the project.

Update

@Kartik, Here you can find documentation about mtouch.

--gcc_flags means :

Add a number of flags directly to the gcc invocation linking the final binary. This can be used to link static code from another static library file (libXXX.a).The darwin linker will remove any code that it does not see directly referenced, add -ObjC to preserve all objective-c segments or -all_load to preserve all static libraries.

Solution 2

How i solved this: I had to uninstall Google Cloud Messaging and replaced it with Firebase Cloud Messaging and all works fine now.

Solution 3

In Xamarin.Forms, for me it was issue in my code. I was using Java.Lang.Thread.Sleep(1000) in PCL. Which on compiling was generating error on iOS which definitely was not a compatible code for iOS.

Comments

[Kartik]

It worked but wondering what does that flag mean and what are the consequences of removing it

[Rick]

I have no gcc flags and still get the error, any thoughts?

[Paul Knopf]

Rick, have you found a solution? I am experiencing the same thing.

[Magnus Ahlin]

Im having the same problems. Any ideas? Are you guys also using Azure Mobile services? Ive got a feeling the fb libs in there clash with the fb sdk ones..

[Alexander]

I had this problem because of using Reveal.app lib. It happened only during compiling for device. What is the version of Xamarin.iOS you use? Specified fix was included in Xamarin.iOS 7.2.1.

[Krishna]

@Alexander could you please help me with this. stackoverflow.com/questions/38820454/…