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Re: Compile errors
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Re: Compile errors


  • Subject: Re: Compile errors
  • From: Greg Parker <email@hidden>
  • Date: Thu, 26 Feb 2009 14:17:29 -0800


On Feb 26, 2009, at 10:21 AM, Barry Fawthrop wrote:

To All, Greetings

I'm trying to build my first iPhone app which has some Kerberos functionality

So I have the files asn1_encode.h and asn1_encode.mm, etc... ....

Inside my App control  AppController.mm


I call the relevant procedures/functions as I need them When I compile I get the following (red circle white x) "_asn1_make_etag", referenced from: _encode_as_req in AppController.o _encode_as_req in AppController.o _encode_as_req in AppController.o _encode_as_req in AppController.o _encode_as_req in AppController.o (red circle whit x) "_asn12krb5_buf", referenced from _encode_as_req in AppController.o ... ... ...


the "... in AppController.o" lines correspond to the number of times the function "... referenced from:" is called in the code
So I call asn12krb5_buf once so it appears once.
I call asn1_make_etag 5 times so it appears 5 times.


The functions exists in the other files and are called using
#import "asn1_encode.h"
#import "asn1_make.h"
etc..

There is no other details about what the error is???
any ideas

Strictly speaking, these are linker errors, not compiler errors. Your encode_as_req() function is calling asn1_make_etag() and asn12krb5_buf(), but the linker can't find the definitions of those two functions.


Your #imports are probably fine, assuming you didn't see any compiler warnings about those functions. Instead, you need to find out where asn1_make_etag() and asn12krb5_buf() are supposed to be and why the linker doesn't see them.
* Make sure those two functions are actually implemented in some file. Watch out for any #if that can hide an otherwise normal implementation.
* Make sure that file is being compiled by your project. Adding `#error compile me!` to the top of asn-whatever.mm is a good way to triple-check that; if you get no error, it's not being compiled.
* Beware of C++ name-mangling. If your asn-whatever.mm file says `extern "C"` in it, then you might need to rename it to asn-whatever.m.



-- Greg Parker email@hidden Runtime Wrangler


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