AA rehash link error

["Øivind"]

When building my program by compiling .o files first and then 
linking, everything links fine, but when I try to compile all the 
source files at once, I get the following link error:

build/debug/dboss-debug.o: In function `@property 
boss.proc.proccmd.ProcCmd.Cmd[immutable(char)[]] 
object.AssociativeArray!(immutable(char)[], 
boss.proc.proccmd.ProcCmd.Cmd).AssociativeArray.rehash()':
/usr/include/dmd/druntime/import/object.di:465: undefined 
reference to 
`_D44TypeInfo_HAyaC4boss4proc7proccmd7ProcCmd3Cmd6__initZ'

The AA in question is a static class member declared as follows:

   static immutable Cmd[string] m_cmds;

And Cmd is a class defined in the same class:

   static class Cmd {
     alias string function(ProcCmd c, string[] args) fExec;

     string  m_cmd;   //Invocation name
     string  m_desc;  //Description of command
     fExec   m_exec;  //Function implementing command

     this(string cmd, string desc, fExec exec) {
       m_cmd = cmd;
       m_desc = desc;
       m_exec = exec;
     }
   }

What am I doing wrong? This is working perfectly fine when 
building object files before linking.