Re: [boost] OS X Link Problems (flat_namespace fix)

From: troy d. straszheim (troy_at_[hidden])
Date: 2005-01-08 14:50:38

Kon Lovett writes:
>> bin/boost/libs/test/build/libboost_prg_exec_monitor.dylib/darwin/
>> debug/runti
>> me-link-static/shared-linkable-true/libboost_prg_exec_monitor-sd
>> -1_32.dylib
>>> ld: Undefined symbols: cpp_main(int, char**)
>>>
>>  <snip>
>>
 > 
 > This an attempt to create a dynamic shared library w/ a two-level  
 > namespace & undefined symbols (cpp_main is a "call-out" from the  
 > library code). Not allowed. Must state the library (an "umbrella  
 > framework" usually) to  resolve from at dynamic link time.
 > 
 > I think this can be solved by shifting to a flat-namespace. I will try.
 > 

Yep, if you change the LINKFLAGS in tools/build/v1/darwin-tools.jam to:

    flags darwin LINKFLAGS <target-type>$(SHARED_TYPES) :
        -undefined suppress -flat_namespace -Wl,-dynamic -nostartfiles -Wl,-dylib -Wl,
-ldylib1.o ;

then things link and run ok...  

troy d. straszheim