Anyone knowing about builtin_new, read this mail : Embedding Boost

From: Peter Soetens (peter.soetens_at_[hidden])
Date: 2002-02-20 07:24:34

Hello,

We use RTLinux for our embedded systems and use C++ in our kernel-modules. 
We can not use : 
Exceptions, 
Rtti and 
new/delete outside the constructors/destructors (it will compile/load but 
crash on execution)

The workaround is done by defining ourselves __pure_virtual etc, and mapping 
new/delete to kmalloc/kfree and some other tweaks. 

We manually link crtbegin.o and crtend.o to our kernel modules and (now 
schrudder all together) manually invoke __do_global_ctors_aux() in 
init_module().

So that works.  Using Boost in the same way requires first making (sgi-)STL 
load in the kernel.  This is done by defining a set of flags like #undef 
__EXCEPTIONS, #defining _MALOC_H and _STDLIB_H and providing our own (kernel 
specific) types and functions needed by STL.  In this way, i could resolve 
all symbols but one : the name mangled __builtin_new : __nw__FUiPv  this 
symbol is defined in libgcc.a and implemented in new.cc and "new" in the gcc 
source tree.  However, i did not succeed yet in replicating this symbol in my 
own object files.  The symbol should be there (since STL also includes new), 
but it does not occur after compilation...  

I believe that once STL got into the kernel, putting Boost in there will be 
quite trivial (hold wood !)... 

Any advice ?

thanks,
Peter