[CMake] Best way to 'pull through' dependencies of External projects?

[Ansis Māliņš]

If I guessed right, your problem is linker errors when building your
project. My solution is to just manually add whatever extra
target_link_libraries are needed to shut the linker up and move on.


On Thu, Feb 14, 2013 at 5:48 PM, Nick Overdijk <nick at astrant.net> wrote:

> I don't really get your specific problem... CMake can find and install ITK
> and DCMTK just fine here? (I had to manipulate the linker-order of DCMTK a
> bit but that's almost to be expected, sadly).
>
> You're saying that when you find_package(DCMTK) it's libraries doesn't
> include some library it needs?
>
> On 2013-14-02, at 16:45:12 , Kent Williams wrote:
>
> The specific problem I'm trying to solve:
>
> Build DCMTK library, along with libraries upon which it depends, for use
> by ITK as a 'system library'
>
> The problem: Setting up the External Projects is simple enough; the
> problem is that the revision/configuration of TIFF -- 3.9.4 -- by default
> requires ZLib.
>
> DCMTK builds against this external TIFF library just fine.
>
> What doesn't happen?  The TIFF's ZLib dependency doesn't get propogated to
> builds that depend on DCMTK, so Zlib is not on the DCMTK library list.
>
> This wouldn't be a problem if TIFF and DCMTK were proper CMake builds. If
> they were when they export their libraries, find_package would carry along
> the dependencies of the imported libraries.
>
> There doesn't appear to be either an elegant or a quick & dirty solution
> to this. The problem is that until DCMTK creates proper CMake config files
> that clue in ITK to DCMTK's own dependencies, ITK's own CMake config files
> will not reflect those dependencies.
>
> Suggestions?
>
> Oh, and by the way I am trying to get DCMTK to generate proper
> configuration files for find_package(NO_MODULE):
> https://github.com/InsightSoftwareConsortium/DCMTK/tree/AddProperConfig
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