broken shared C++ libraries with pkgsrc libtool

[Matthias Drochner <M.Drochner%fz-juelich.de@localhost>]

The new pkgsrc libtool creates C++ libraries with an unresolved
reference to "__dso_handle" (with destructors of static objects).
This is wrong, but I'm not sure whether only libtool is to blame
or whether our toolchain's use of the startup files contributes
as well. (It seems to be linked to the use of cxa_atexit.)

The problem is that libtool now uses "--nostdlib" when shared
libraries are built. Here is an illustration that this just
doesn't work:

$ cat mist.cpp
class mist
{
public:
~mist() { }
};
static mist mist;
$ c++ -fPIC -c mist.cpp
$ c++ -shared -o libmist.so mist.o
$ nm libmist.so |grep dso
000016d0 d __dso_handle
$ c++ -shared -nostdlib -o libmist.so mist.o
$ nm libmist.so |grep dso
         U __dso_handle

So is building shared libs with --nostdlib supposed to work
in general?

best regards
Matthias



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