> On Jan 26, 2017, at 1:23 AM, David Jobet <david.jo...@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. >
I’ve never used protobufs as an external project (I’ve always just done a one-time setup/install)…but is there a reason you can’t just use the standard finder to locate it? https://github.com/Kitware/CMake/blob/master/Modules/FindProtobuf.cmake -Mike -- 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
