[CMake] externalproject_add and generating sources

[David Jobet]

Oh ok, I see how it works, it makes sense, but I'm somehow disappointed : in order to use it, I'm going to have to change my own project while I originally thought it was going to be a kind of FindXXX on steroid...
I'll give it a try though, tx for pointing it out.

David

Le 26 janvier 2017 13:02:43 GMT+00:00, Nicholas Braden <nicholas11braden at gmail.com> a écrit :
>You'll also want to build your own project with ExternalProject, and
>use
>the DEPENDS option to control build order. This ensures that all
>dependencies are fully installed before your own project is even
>configured. The project with all the ExternalProject calls is typically
>called a superbuild, and effectively becomes an optional convenience to
>building your own project.
>
>On Thu, Jan 26, 2017 at 3:23 AM, David Jobet <david.jobet at free.fr>
>wrote:
>
>> Hello,
>>
>> suppose I want to use protobuf and integrate it in my project with
>> externalproject_add. (actually, I just have precompiled binaries and
>libs +
>> header files, I don't have the full sources)
>> Once the project has been 'built' (actually, installed by a custom
>> rpm-like tool to a shared path), I can use the protoc compiler to
>generate
>> protobuf c++ files (.pb.h and .pb.cpp files) from a .proto
>description file.
>> I can add_dependencies so that the external project is built before
>> projects depending on libprotobuf.a.
>>
>> However, I don't know how to do the same thing with .pb.h and .pb.cpp
>> files which use a .proto file and the protoc compiler.
>>
>> make is fine with it, but ninja complains with an error like this :
>> ninja: error:
>'/path_to_external_projects/protobuf/2.6.0.4/bin/protoc',
>> needed by 'some_project/SomeFile.pb.h', missing and no known rule to
>make it
>>
>> how can I tell ninja that protoc is going to be provided by
>> externalproject ?
>> If I use byproducts, ninja is happy, but "ninja clean" deletes
>> /path_to_external_projects/protobuf/2.6.0.4/bin/protoc.
>> I don't want that to happen since
>/path_to_external_projects/protobuf/
>> 2.6.0.4/bin/protoc is shared with other users.
>>
>> With regards
>>
>> David
>> --
>>
>> Powered by www.kitware.com
>>
>> Please keep messages on-topic and check the CMake FAQ at:
>> http://www.cmake.org/Wiki/CMake_FAQ
>>
>> Kitware offers various services to support the CMake community. For
>more
>> information on each offering, please visit:
>>
>> CMake Support: http://cmake.org/cmake/help/support.html
>> CMake Consulting: http://cmake.org/cmake/help/consulting.html
>> CMake Training Courses: http://cmake.org/cmake/help/training.html
>>
>> Visit other Kitware open-source projects at http://www.kitware.com/
>> opensource/opensource.html
>>
>> Follow this link to subscribe/unsubscribe:
>> http://public.kitware.com/mailman/listinfo/cmake
>>

-- 
Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez excuser ma brièveté.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/cmake/attachments/20170129/a50d42ef/attachment.html>