Gold handles explicitly undefined symbols (-u <symbol>) differently from      
how the old GNU linker handles then.  With gold, if the symbol does not       
appear defined in any input object, it is added to both the symtab (symbol    
table) and the dynsym (dynamic symbol table) as an undefined symbol.  The     
old linker only adds the symbol to the symtab in that case.  It works fine if
the symbol gets defined in an input object.                     
                                                                                
The reason for this problem turns out to be the fact that during input object 
processing, "-u" symbols are checked as symbol tables are processed.  Then,   
all "-u" symbols are added as undefined symbols unless they were already      
seen (i.e. it adds all symbols that didn't appear in input object symbol      
tables).                                                                      
                                                                                
The fix for this problem turns out to be very easy: mark the "-u" symbols     
that are added after input object processing as not needing dynsym entries.

Index: gold/symtab.cc
===================================================================
RCS file: /cvs/src/src/gold/symtab.cc,v
retrieving revision 1.107
diff -r1.107 symtab.cc
176a177
>   this->dynsym_index_ = -1;