I've taken on Co-maintainership for Inline::CPP. Neil Watkiss seemed happy (or relieved) to have someone take an interest. The latest version will show up on the CPAN mirrors within a few hours as 0.29. It has addressed the "failure to pass its test suite" issue, at least on my Windows and Linux systems, and should work for Mac now too. We'll see when the CPAN testers matrix gets updated. The issue turned out to be some code that appended '.h' to the end of the #include <iostream> preprocessor directive. While that was "the right way" back in 2001, nowadays in 2011 standard C++ doesn't use a .h extension for the core header files.
I tweaked a couple other items from the bug reports where the application of the fix was pretty obviously a win. I'll try to get to looking at a few other issues in the next couple of weeks.
If anyone has comments or suggestions, I would appreciate hearing them. As with most things in the Perl and CPAN world, those suggestions that come with a test and a patch will be given higher priority. Bonus points for a test in a TAP compatible '*.t' file format. :)
Once Inline::CPP version 0.29 shows up on the servers (which should be any time now) I encourage brave people who have familiarity with C++ to give it a try. I'm finding all sorts of little issues that I'll need to look at. One, for example, is that if you try to sv_2mortal( av )... that's a problem as C++'s stricter typing wants sv_2mortal( sv ) only. One item for the ToDo list. ;)