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https://issues.apache.org/jira/browse/STDCXX-643?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12582760#action_12582760
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Travis Vitek commented on STDCXX-643:
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I'm assuming that you are talking about asserting the size of the runtime
library exceptions in a configuration test, is that right? If so, what happens
if the config test fails? Without something else, nobody will notice unless
they are actually looking for the failure message in the configuration spew. I
guess that we could use the configuration test to set a macro like
{{_RWSTD_NO_EXCEPTION_BROKEN}}, and then in the library we could assert at
compile time that the macro is defined. That way the library will fail to build
if we don't know the proper sizes for the exception classes. The problem with
this is that we have to hardcode the correct values for all compilers we know.
This config test, and the implementation, would need to be ported for any new
environment that we wanted to support or that our users would want to use.
I think an ideal solution would be to do something to guarantee that these
objects are of the correct size, even for compilers that we don't officially
support. We already do it for things like {{struct lconv}} and {{struct tm}},
why not {{std::exception}}?
> std::exception declaration incompatible with implementation provided by
> runtime library on AIX
> ----------------------------------------------------------------------------------------------
>
> Key: STDCXX-643
> URL: https://issues.apache.org/jira/browse/STDCXX-643
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 19. Diagnostics
> Affects Versions: 4.2.0
> Environment: AIX
> Reporter: Travis Vitek
> Fix For: 5.0
>
>
> A description of the problem is available here.
> http://www.nabble.com/19.exceptions.mt.cpp-fails-on-AIX-tf4738595.html
> Essentially we need to add a const char* member to std::exception for AIX.
> Unfortunately the fix is a binary incompatible with previous versions of
> stdcxx.
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