[CMake] ExternalProject_Add examples

[Fraser Hutchison]

There's a StackOverflow answer I did a while back which gives an example 
of ExternalProject_Add for GTest: http://stackoverflow.com/a/9695234/2556117

It maybe needs updated, and I don't think I ever tried it on OSX, but it 
should hopefully be an OK starting point.  (If not - hack away at my 
answer!)

Cheers,
Fraser.


On 24/10/2013 09:35, Witold E Wolski wrote:
> Would also like to start configuring external dependencies with
>
> ExternalProject_Add
>
> So some examples would be pretty useful to me. So did you ended up
> collecting some examples?
> Sure, you posted in this links to repositories, but finding the
> "ExternalProject_Add" in these huge projects with hundreds of
> CMakeLists.txt is not easy if they are not in the top-level
> CMakeLists.txt and they are not there.
>
> My dependencies are
>
> gtest - Cmake
> glog - Cmake
> tbb - configure make
> vigra - Cmkae based
> soci - Cmake based
> pwiz
>
>
> regards
>
>
>
> On 18 March 2012 00:24, Luigi Calori <l.calori at cineca.it> wrote:
>> On 17/03/2012 22.11, Marcus D. Hanwell wrote:
>>> On Sat, Mar 17, 2012 at 5:03 PM, Bill Lorensen<bill.lorensen at gmail.com>
>>> wrote:
>>>> Folks,
>>>>
>>>> I've recently created a number of super builds using CMake's External
>>>> Project mechanism. Each external project requires some sort of
>>>> download, configuration, build and possibly install. The CMake defines
>>>> needed to correctly access the results of the external project vary
>>>> significantly. The trickiest part is find the proper download,
>>>> configuration and CMake defines.
>>>>
>>>> For example, for the Point Cloud Library (http://pointclouds.org/) I
>>>> created these external projects:
>>>> VTK - git, cmake, make; VTK_DIR
>>>> FLANN - zip, cmake, make install; FLANN_LIBRARY, FLANN_INCUDE_DIR
>>>> Eigen - .tar.bz2,; EIGEN_INCLUDE_DIR
>>>> Qhull - git, cmake, make;QHULL_LIBRARY,QHULL_INCLUDE_DIR
>>>> Boost - .tar.gz, bootstrap.sh, b2; BOOST_ROOT
>>>> GTest - .zip, cmake, make; GTEST_ROOT,GTEST_INCLUDE_DIR
>>>>
>>>> Slicer4 has many more.
>>>>
>>>> Should we start collecting sample ExternalProject_Add files for
>>>> external projects?
>>> We have talked about doing this too (I have Eigen, Boost, GTest and
>>> others for example). The standard CMake based projects hardly seem
>>> worth it, but it depends on what you want to do with them I suppose.
>>> For the work we are doing in chemistry we have been working on an
>>> experimental superbuild that uses a common prefix in the build tree to
>>> install to, and then all we need pass in is CMAKE_PREFIX_PATH - this
>>> can make the logic significantly easier for dependent CMake projects
>>> as it will always search within the prefix first.
>> I did something similar, trying to collet all the build of stuff that I had
>> to do in a single place powered by cmake
>> Used  CMAKE_PREFIX_PATH and a single source place where all the builds
>> download  and expand
>>
>> you can have a look at
>>
>> https://hpc-forge.cineca.it/svn/CmakeBuilds/lib/
>>
>> It's just for my use only, so really dirty and not properly checked, I' m
>> also looking for good starting point for common stuff like Qt, boost and
>> others
>> (I' tried to collect in the folder  Packages the tricky part of building
>> the components,) I' ve tried to define a dependency graph but it' still
>> messy
>>
>> anyway I would really appreciate a place where to share good "recipies" for
>> CMake building packeges
>>
>> Thanks
>>                    Luigi
>>
>>
>>
>>
>>
>>
>>> The Qt external project was pretty tricky too, and we are using that
>>> in several places along with smaller libraries like libxml2.
>>>
>>> Marcus
>>> --
>>>
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>>
>> --
>> Luigi Calori
>> SuperComputing Applications and Innovation Department
>> CINECA - via Magnanelli, 6/3, 40033 Casalecchio di Reno (Bologna) - ITALY
>> Tel: +39 051 6171509  Fax: +39 051 6132198
>> hpc.cineca.it
>>
>>
>> --
>>
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the CMake FAQ at:
>> http://www.cmake.org/Wiki/CMake_FAQ
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.cmake.org/mailman/listinfo/cmake
>
>