I've been having strange linker errors recently and I have no ideas why they've started happening.

When compiling/linking:

  import std.stdio;
  void main() { writeln("Hello"); }

with DMD 2.053 I get linker error:

  Undefined symbols:
  "_D3std9exception7bailOutFAyaixAaZv", referenced from:
_D3std9exception148__T7enforceTbVAyaa60_2f4c6962726172792f436f6d70696c6572732f646d64322f6f73782f62696e2f2e2e2f2e2e2f7372632f70686f626f732f7374642f737464696f2e64Vi1481Z7enforceFbLAxaZb
  in test.o
  ld: symbol(s) not found
  collect2: ld returned 1 exit status


My first thought was that it isn't linking with phobos, but compiling with -v confirms that it is:

  gcc test.o -o test -m32 -Xlinker -L/Library/Compilers/dmd2/osx/bin/../lib -lphobos2 -lpthread -lm


My GCC version is 4.2.1

  $ gcc --version
  i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664)
  Copyright (C) 2007 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions.  There   is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


I've tried re-downloading DMD again, but this didn't work.

It appeared to start happening after running an update of all my outdated packages in MacPorts, but I can't be sure that that's the issue.

Any help tracking down the problem would be much appreciated. Thanks.

"Peter Alexander" <peter.alexander.au@gmail.com> wrote in message news:itlk5g$e7t$1@digitalmars.com...
> I've been having strange linker errors recently and I have no ideas why they've started happening.
>
>   Undefined symbols:
>   "_D3std9exception7bailOutFAyaixAaZv", referenced from:
> _D3std9exception148__T7enforceTbVAyaa60_2f4c6962726172792f436f6d70696c6572732f646d64322f6f73782f62696e2f2e2e2f2e2e2f7372632f70686f626f732f7374642f737464696f2e64Vi1481Z7enforceFbLAxaZb
>   in test.o
>   ld: symbol(s) not found
>   collect2: ld returned 1 exit status

Last time I got something like this it was from an outdated phobos.lib on my path.  Could be what's happening to you.

On 19.06.2011 23:52, Peter Alexander wrote:
> I've been having strange linker errors recently and I have no ideas why they've started happening.
>
> When compiling/linking:
>
>   import std.stdio;
>   void main() { writeln("Hello"); }
>
> with DMD 2.053 I get linker error:
>
>   Undefined symbols:
>   "_D3std9exception7bailOutFAyaixAaZv", referenced from:
> _D3std9exception148__T7enforceTbVAyaa60_2f4c6962726172792f436f6d70696c6572732f646d64322f6f73782f62696e2f2e2e2f2e2e2f7372632f70686f626f732f7374642f737464696f2e64Vi1481Z7enforceFbLAxaZb 
>
>   in test.o
>   ld: symbol(s) not found
>   collect2: ld returned 1 exit status
>
>
> My first thought was that it isn't linking with phobos, but compiling with -v confirms that it is:
>
>   gcc test.o -o test -m32 -Xlinker -L/Library/Compilers/dmd2/osx/bin/../lib -lphobos2 -lpthread -lm
>
>
> My GCC version is 4.2.1
>
>   $ gcc --version
>   i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664)
>   Copyright (C) 2007 Free Software Foundation, Inc.
>   This is free software; see the source for copying conditions.  There   is NO
>   warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
>
> I've tried re-downloading DMD again, but this didn't work.
>
> It appeared to start happening after running an update of all my outdated packages in MacPorts, but I can't be sure that that's the issue.
>
> Any help tracking down the problem would be much appreciated. Thanks.

I had a lot of undefined linker symbols on linux recently, in the end I had to rebuild dmd, druntime & phobos from the latest git master.

-- 
Dmitry Olshansky