On Mon, Nov 30, 2009 at 12:53:53PM +0200, Kalev Lember wrote: > On 11/30/2009 12:19 PM, Richard W.M. Jones wrote: > > On Mon, Nov 30, 2009 at 11:56:46AM +0200, Kalev Lember wrote: > >> To work around that, upstream mingw has a patch to annotate > >> functions which support unwinding with SEH with > >> __attribute__((seh_aware)). I've tested that patch and it really > >> does fix binary compatibility with binaries produced by Visual > >> Studio. > > > > I'm not quite sure I understand this bit - which functions > > need to be annotated? > > Lets say we have function a() in a.dll (compiled with mingw), b() in > b.dll (compiled with Visual Studio) and main() in c.exe (compiled with > mingw). c.exe is linked against b.dll, and b.dll is linked against > a.dll. Now if an exception is thrown in a() and rethrown in b(), then > b() prototype in header file has to be annotated like this to make it > possible to catch it in main() in c.exe: > > void b() __attribute__((seh_aware)); > > MinGW unwinder supports unwinding either DWARF2 or SEH, but the runtime > has no way of knowing whether a function supports unwinding with SEH. > The patch is a workaround to add seh_aware attribute to foreign (SEH) > function declarations. MinGW release notes [3] explain that it's only a > temporary measure and future versions of w32api will have a way of doing > it automatically. > > [3] http://sourceforge.net/project/shownotes.php?release_id=691876
It certainly sounds like a hack ... But I know even less about this than anyone else on this thread, so I'll shut up. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html _______________________________________________ fedora-mingw mailing list [email protected] https://admin.fedoraproject.org/mailman/listinfo/fedora-mingw
