[CMake] SubProject configuration in same build as host

[Dave Partyka]

Just thinking out loud but we could make an "external_project" call instead.
This would sync, configure, build and install it easily without needing to
override anything. And then ParaView would just FindPackage(HDF5) with the
internal build directory as a hint.

On Thu, Apr 15, 2010 at 5:40 AM, Biddiscombe, John A. <biddisco at cscs.ch>wrote:

>  Within paraview we wish to build hdf5, which is now cmake based, so we
> ADD_SUBDIRECTORY(blah) and hdf5 is compiled nicely with lib targets added to
> the build.
>
>
>
> Some settings (like lib names) are needed by the host project, so we want
> to
>
> *SET(HDF5_CONFIG
> ${ParaView_BINARY_DIR}/Utilities/hdf5-1.8/HDF5-config.cmake)*
>
> *INCLUDE(${HDF5_CONFIG})*
>
>
>
> But this file – which is generated for us by cmake and placed in the build
> tree – has contents like
>
> *# Create imported target vtkhdf5*
>
> *ADD_LIBRARY(vtkhdf5 SHARED IMPORTED) *
>
> * *
>
> And naturally if I include this inside the host project build – it
> complains that vtkhdf5 can’t be added as an imported library as it is
> already a target in the main build – created when I did add_subdirectoy for
> the hdf5 source.
>
>
>
> Is there a similar functionality, other than the ‘old style’ configure_file
> command to generate a bunch of settings that can be picked up by the host
> project. I had the impression that the new project import/export/install
> stuff was designed to make this sort of thing more automated, but I think
> I’m missing a piece of the puzzle.**
>
> * *
>
> thanks
>
>
>
> JB
>
> * *
>
> --
>
> John Biddiscombe,                            email:biddisco @ cscs.ch
>
> http://www.cscs.ch/
>
> CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
>
> Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82
>
>
>
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