[Cmake] stripping repeated link directories and libraries from each makefile.

[Ian Scott]

> From: Bill Hoffman [mailto:bill.hoffman at kitware.com]
> 2.  A twice repeated list is not enough in some cases.
> In fact, to guarantee a static link, you have to repeat N libraries
> N times.   So, some list files may repeat libraries intentionally.

Actually I think it is worse than that in theory. If you have two libraries
A and B, with functions A1, A2, .. Am B1, B2, ...Bm and A1 depends on B1
which depends on A2, etc, you need to repeat the list m times.

In practice however, these problems almost never arise. For instance VXL is
designed with a guaranteed acyclic directed dependency graph for other
reasons. This means that it is only necessary to include each library once,
if you get the order right. Maybe I could put an option in, to turn
filtering on or off?

Ian.


>
>
> -Bill
> At 11:54 AM 7/27/2001 +0100, Ian Scott wrote:
> >I am considering
> >1) reducing the library link directories list in each
> cmMakefile to a list
> >of unique directories before output to the dsp file.
> >2) reducing the library list in each cmMakefile to a twice
> repeated list of
> >unique libraries before output to the dsp file.
> >A small experiment suggests that both the number of link
> directories and
> >number of linked libraries in each dsp file has a
> significant effect on the
> >project loading time in MSVC++.
> >
> >Whilst I can't see any problem with going ahead with 1,
> other's may find the
> >current full list of libraries to be useful.
> >
> >Any comments?
> >
> >Ian.
> >
> >
> >
> >
> >
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