__cxxabiv1 linker issues

[Patrick Spendrin]

Hi everybody,

we are currently using the 4.4.7 build of ozkan, but due to a bug in the
std::string handling (copying std::string's across dll boundaries
corrupts the heap) we now have to update our compiler.

We have hit an issue with all the compilers tested so far:
when linking binaries build with -Wl,disable-auto-import we get a lot of
undefined references to vtable's of __cxxabiv1::__function_type_info
etc. This can be fixed by either using the static libstdc++ or by
removing disable-auto-import. Since we want to keep disable-auto-import,
do you have an idea how to fix this?
My first idea was to check for the exports of the libstdc++ dll but
those are correct and the symbols in question are contained inside the
libstdc++. Looking for the header in question, the symbols are not
exported via declspec(dllexport), but that would have given other linker
errors as well (e.g. about the destructor of those classes). Also, it
doesn't seem as if the header file for those symbols is read at all, the
compiler doesn't seem to take a look at cxxabi.h (even though it will do
so later in our build).

So my question is: what is different in that part of gcc between those
versions (we tested sezero 4.5 and rubenvb 4.6.3-1).

regards and thanks for all your work,
Patrick