Compilation Error with libtiff's CMath::CMath dependency.

[blowekamp]

Building SimpleITK against an installed ITK from the master branch has the following error:

 The link interface of target "itktiff" contains:

    CMath::CMath

  but the target was not found.  Possible reasons include:

    * There is a typo in the target name.
    * A find_package call is missing for an IMPORTED target.
    * An ALIAS target is missing.

https://github.com/SimpleITK/SimpleITK/actions/runs/11990814469/job/33428736685
https://open.cdash.org/viewBuildError.php?buildid=10045709

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[blowekamp]

It look like libtiff defines a custom imported target:
https://github.com/InsightSoftwareConsortium/ITK/blob/master/Modules/ThirdParty/TIFF/src/itktiff/cmake/FindCMath.cmake

@bradking Would you agree the best way to address this for ITK is to update libtiff to use "CMath_INCLUDE_DIRS" and "CMath_LIBRARIES" over the imported target?

[bradking]

@blowekamp yes, that's the simplest solution. I don't know why TIFF has a find module for a standard C library component.

[SimonRit]

Thanks, the fix did work for RTK, see here and here.

[dzenanz]

Should this be closed now?

[dzenanz]

@blowekamp close this?

[blowekamp]

closed by #4989