forced dependency on libtsdc++

[Martin Sebor <sebor at roguewave dot com>]

This used to work up until very recently (gcc-20001002) but now I'm
getting linker errors. Using g++ resolves the references but also links
in libstdc++.

Looking at the recent snapshot, the symbols are now undefined in
libgcc.a:

$ nm -C gcc-20001113/lib/gcc-lib/i686-pc-linux-gnu/2.97/libgcc.a | grep
__builtin_new

and they are defined in libstdc++ instead:

$ nm -C gcc-20001113/lib/libstdc++.so |  grep __builtin_new
0009f0f4 T __builtin_new

This is different from gcc-20001002 where the symbols are in libgcc:

$ nm -C gcc-20001002/lib/gcc-lib/i686-pc-linux-gnu/2.97/libgcc.a |  grep
__builtin_new
00000004 W __builtin_new
         U __builtin_new

and only being referenced from libstdc++:

$ nm -C gcc-20001002/lib/libstdc++.a.2.10.0 |  grep __builtin_new
         U __builtin_new
         U __builtin_new

It's important for our implementation of the Standard C++ library (as
well as other 3rd party standard libraries, I'm sure) not to depend on
anything in libstdc++ if nothing else then for copyright reasons. Is
there a way to _NOT_ link in libstdc++ and still get these symbols (this
isn't limited to the operator new and delete but also exception
handling, rtti, etc.)? 

Thanks
Martin


$ cat test.cpp

int main ()
{
    new int;
    new int [1];
}

$ gcc test.cpp
/tmp/ccx2Rwli.o: In function `main':
/tmp/ccx2Rwli.o(.text+0xc): undefined reference to `__builtin_new'
/tmp/ccx2Rwli.o(.text+0x19): undefined reference to `__builtin_vec_new'
collect2: ld returned 1 exit status