[vtk-developers] Phantom "make" dependency after header is removed

[David Gobbi]

Aha, I found a CMake issue that might be related to this (
https://gitlab.kitware.com/cmake/cmake/issues/16830).  I'll give it a
read-through to see if it addresses the same problem.  Perhaps it has
something to do with the use of cmake_custom_command(... IMPLICIT_DEPENDS
...) in vtkWrapPython.cmake.  That would explain why only wrapper targets
are affected.

 - David

On Fri, Feb 2, 2018 at 10:22 AM, David Gobbi <david.gobbi at gmail.com> wrote:

> Hi All,
>
> Over the past few months, I've thrice had build failures when headers were
> removed from the source code, but "make" still reported a dependency on the
> header even after I re-ran cmake.
>
> For example, recently vtk_libhdf5_mangle.h was removed and replaced with
> vtk_hdf5_mangle.h, but it still appeared in "depend.make" for
> vtkIOAMRPythonD (but for some reason it didn't appear in the depend.make
> for other targets that had a dependency on vtkhdf5).
>
> I can always fix the problem by doing a clean build, but I'm wondering,
> has anyone else has seen phantom dependencies like this for the Makefile
> generator?  Is there a reason why cmake would sometimes not correctly
> update depend.make after all references to a header are removed from the
> source?
>
>  - David
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://vtk.org/pipermail/vtk-developers/attachments/20180202/cc83127f/attachment.html>