c++ exceptions in shared library results in crash

[Danny Smith]

From: "Rainer Hochreiter"
--------------------------------------------------------------------------------

> throwing an exception in the shared library results in a core dump of the
> binary executable - but only for the cross-compiled version!

cygwin and mingw gcc sources contain a local patch to allow
throwing C++ exceptions across dll/exe boundaries. These
local hacks have never been submitted to FSF GCC lists. Without
this patch, one option you have to allow exceptions across dll/exe
boudaries is to build libstdc++.a and libgcc.a as dlls. This is not done by GCC
makefiles, but can be done done manually. Libstdc++ dll  relies on auto-import
functionality, so watch your pseudo-runtime-relocs (a techno name for "blue
psuede shoes")

Someone may well ask why this local patchset has not been
submitted for review on GCC lists, and that would be a good
question.  My answer would be that they need more work before
submission..

Danny






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