Re: default cflags to compile

["Nuno Lopes" <ncpl at mega dot ist dot utl dot pt>]

> On Mon, 12 Dec 2005, Nuno Lopes gibbered uncontrollably:
> > > > I need to generate a gcc binary that will always enable the
> > > > -fabi-version=1, because I have a library built with gcc 3.3 and I
> > > > need to link with it, but I would like to use gcc 4.
> > >
> > > The libstdc++ ABI broke between these releases, so unless your library
> > > doesn't use libstdc++ at all (somewhat unlikely), there is little point
> > > to this.q
> >
> > The problem is that we are using a closed-source library from Sony
> > (for their robots AIBO, which run on a MIPS) and they don't support
> > anything other than gcc 3.3.
>
> You're in trouble then.
>
> > If the library uses libstdc++, does it help if I compile it with
> > -fabi-version?
>
> Only if you *never* pass any objects manipulated by that old libstdc++
> to the newer version of libstdc++, or vice versa. This is likely to be
> hard to ensure.


Update: I've tried to compile some sample sources, but linking has failed 
with:

/usr/local/OPEN_R_SDK/OPEN_R/bin/mkbin -p /usr/local/OPEN_R_SDK -o 
tinyFTPD.bin TinyFTPDStub.o TinyFTPD.o FtpPI.o FtpRequest.o FtpDTP.o 
FtpMethod.o 
tinyFTPD.ocf -L/usr/local/OPEN_R_SDK/OPEN_R/lib -lObjectComm -lOPENR -lInternet 
-lantMCOOP
/usr/local/OPEN_R_SDK/OPEN_R/lib/libObjectComm.a(OObserver.o): In function 
`OObserver::OObserver()':
OObserver.cc:(.text+0x64): undefined reference to 
`std::__default_alloc_template<true, 0>::allocate(unsigned int)'
OObserver.cc:(.text+0x16c): undefined reference to 
`std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)'
/usr/local/OPEN_R_SDK/OPEN_R/lib/libObjectComm.a(OObserver.o): In function 
`OObserver::OObserver()':
OObserver.cc:(.text+0x1f8): undefined reference to 
`std::__default_alloc_template<true, 0>::allocate(unsigned int)'
OObserver.cc:(.text+0x300): undefined reference to 
`std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)'
/usr/local/OPEN_R_SDK/OPEN_R/lib/libObjectComm.a(OObserver.o): In function 
`OObserver::~OObserver()':
OObserver.cc:(.text+0x3b0): undefined reference to 
`std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)'
OObserver.cc:(.text+0x41c): undefined reference to 
`std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)'
/usr/local/OPEN_R_SDK/OPEN_R/lib/libObjectComm.a(OObserver.o): In function 
`OObserver::~OObserver()':
OObserver.cc:(.text+0x4dc): undefined reference to 
`std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)'
OObserver.cc:(.text+0x548): undefined reference to 
`std::__default_alloc_template<true, 0>::deallocate(void*, unsigned int)'
/usr/local/OPEN_R_SDK/OPEN_R/lib/libObjectComm.a(OObserver.o):OObserver.cc:(.text+0x608): 
more undefined references to `std::__default_alloc_template<true, 
0>::deallocate(void*, unsigned int)' follow
/usr/local/OPEN_R_SDK/OPEN_R/lib/libObjectComm.a(OObserver.o): In function 
`std::list<OSubjectInfo, std::allocator<OSubjectInfo> 
>::_M_create_node(OSubjectInfo const&)':
OObserver.cc:(.gnu.linkonce.t._ZNSt4listI12OSubjectInfoSaIS0_EE14_M_create_nodeERKS0_+0x28): 
undefined reference to `std::__default_alloc_template<true, 
0>::allocate(unsigned int)'
(...)


And it continues with a couple more errors about that default_alloc function 
and std::list. Isn't there a workaround, so that I can link the objects with 
the old lib?


Thanks,
Nuno