[XaraXtreme-dev] Re: Dependencies

[Alex Bligh <alex@xxxxxxxxxxx>]

> > So, interesting questions arise, like "why is arrows.h in the .pch".
> > And even better, "why does changing biasgain.h cause an automatic
> > rebuild of over 200 files when it's just a control". I suspect
> > the answer is "because someone didn't know about forward references"
> > but in any case I'm going to improve the tool so it will actually
> > go through the files and find the tree of includes if you ask
> > it nicely.

So now you can use it to answer questions like "why do so many
things depend on biasgain.h":

$ Scripts/gendeps.pl -e -i biasgain.h */.deps/*.Po
...
[  0] biasgain.h which is included by 1153 other files:
[  1]   fillval.h which is included by 510 other files:
[  2]     fillattr.h which is included by 372 other files:
[  3]       nodebev.h which is included by 97 other files:
[  4]         nbevcont.h which is included by 47 other files:
[  5]           opbevel.h which is included by 25 other files:
[  6]             bevinfo.o
[  6]             bevtool.o
[  6]             beztool.o
[  6]             blndtool.o
[  6]             blndtool.o
[  6]             cntrtool.o
...
[  1]   bars.h which is included by 292 other files:
[  2]     sgallery.h which is included by 115 other files:
[  3]       ngcore.h which is included by 21 other files:

And we discover a forward reference in bars.h would have done
just as well (check-in coming right up, along one removing
dependency on bars.h from sgallery.h).


Or we can ask 'why does node.cpp get rebuilt so often' (not
that it does, but...)

$ Scripts/gendeps.pl -e -t node.o */.deps/*.Po
...
[  0] node.o which includes 5386 other files:
[  1]   camtypes.h which includes 1595 other files:
[  2]     epsfiltr.h which includes 556 other files:
[  3]       filters.h which includes 354 other files:
[  4]         txtattr.h which includes 139 other files:
[  5]           attrval.h which includes 120 other files:
[  6]             arrows.h which includes 76 other files:
[  7]               paths.h which includes 56 other files:
[  8]                 attr.h which includes 17 other files:
[  9]                   doccoord.h which includes 16 other files:
[  9]                     camtypes.h (already included)
[ 10]                     matrix.h which includes 7 other files:
[ 10]                       camtypes.h (already included)
[ 11]                       ccmaths.h which includes 4 other files:
[ 12]                         fixed16.h which includes 1 other files:
[ 13]                           fixed.h
[ 12]                         fixed.h
[ 12]                         xlong.h
[ 11]                       ccobject.h
[ 11]                       coord.h which includes 0 other files:
[ 11]                         camtypes.h (already included)


Alex