[SGVLUG] C++ code comprehension tools

[Braddock]

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I am currently digging into a 140k line sophisticated C++ Linux
application.  I am learning my way around the code base, and vim and
cscope just do not cut it for finding references and call sites in
advanced C++.

I want a tool that lets me look at entity references, find method
definitions, graphs class diagrams, etc.

"Understand" by scitools is exactly what I want, and even runs on
Linux, but it is $1,000 per seat.  I am burning through my two week
trial, but am hesitant to ask my client to lay out that much money.

Does anyone have any experience with open source (or lower cost) code
analysis alternatives that won't be a waste of my time when dealing
with complex C++ code?  Perferably native Linux but I'm not beneath
running them in a Windows 8 VM.

Thanks,
Braddock
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