Another way is to use a clang plugin to generate a more accurate list of definitions and call sites. That's what I would do, because clang would handle all of the macro and language parsing.
On Monday, 1 April 2013, Thomas Arnhold wrote: > Hi, > > there are several unused methods in the source which callcatcher doesn't > catch. Two examples: 08b91c63131b7e625d2a2c489bc537**dafe5c5963 and > c12ab867f282e783507fcf74ab5c90**e784681f65 which had only (virtual) > definitions, but no calls. > > The same applies to inlines like 646daee253b69404591c006ec6e717**b6660af30b. > Defined, but no calls. > > So the idea is to get something like a list of all methods in the project. > First counting (virtual) definitions and second counting all calls. > > Counting the calls is not as easy as it seems. So I had the idea to > preprocess the source files with -fpreprocessed -dD -E to get source files > without comments and much other cruft removed (which may lead to > false-positives). Counting in those files seems easier. So it would be 1st > count definitions, 2nd count all occurrences. If they are equal there are > no calls. > > This would be a way to find possible candidates for removal (excluding > DLLPUBLIC stuff). Pros: platform independent. Cons: No macro expansion, if > there are several independent methods which have the same name, but one is > unused it's not possible to identify the unused one. So it will only > identify a fraction of all unused stuff. The question is how big is this > fraction ;) > > So my question: Is it worth doing this (because it's not the cleanest > way)? Or did I miss something, especially the point "no calls, no users"? > > > Another possible way: gcc with -fdata-sections and -ffunction-sections > [1]. Where both results could be compared and unused methods could be > identified. But I didn't try that. Did anyone do such thing? > > Thomas > > > [1] http://embeddedfreak.**wordpress.com/2009/02/10/** > removing-unused-functionsdead-**codes-with-gccgnu-ld/<http://embeddedfreak.wordpress.com/2009/02/10/removing-unused-functionsdead-codes-with-gccgnu-ld/> > ______________________________**_________________ > LibreOffice mailing list > [email protected] > http://lists.freedesktop.org/**mailman/listinfo/libreoffice<http://lists.freedesktop.org/mailman/listinfo/libreoffice> >
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