Cannot install the debian file on Ubuntu 16.04 LTS about ecal HOT 4 CLOSED

Yes, this is really a problem with Ubuntu 16.04, which ships a really old protobuf version (2.6.1), but eCAL requires protobuf > 3.0.
If you can, switching to Ubuntu 18.04 might make things easier, because the system protobuf package fullfills ecals requirements.

Also protobuf and CPack don't play together nicely.
Therefor I would recommend the following:
Download recent protobuf sources (we always tested with 3.5.1) and build protobuf from source.
Then create a debian package using checkinstall.

git clone https://github.com/google/protobuf.git
cd protobuf
git checkout 3.5.1.1
./autogen
./configure "CFLAGS=-fPIC" "CXXFLAGS=-fPIC"
make -j8
make check -j8
checkinstall --pkgname libprotobuf3-dev --pkgversion 3.5.1.1 --pkgrelease 2 --pkglicense "BSD" --provides libprotobuf3-dev --default --fstrans=yes --maintainer \"[email protected]\" --default --exclude \"/home\" --install=no

This will create a .deb file for you which you can install with

sudo dpkg -i <name-of-deb>.deb
sudo ldconfig

Unlike with CPack, checkinstall will install everything to usr/local instead of usr so you won't get into trouble with conflicting headers.

If you don't care about your system, you can also just do sudo make install instead of creating a debian package 😉

After these steps, eCAL should compile successfully (with ECAL_THIRDPARTY_BUILD_PROTOBUF to OFF)

from ecal.

Hi @famkoc, by default eCAL ships it dependencies inside the thirdparty sub folder as git submodules and is using them to link against. This approach has advantages and disadvantages and was discussed in another issue.
In your case the installed protobuf library is conflicting with the library version that is checked out in the mentioned third party folder.
You can force cmake to use the installed version by switching off the cmake parameter ECAL_THIRDPARTY_BUILD_PROTOBUF. Then the conflict should be solved.
Second option would be to uninstall the 2.6 version of protobuf from your system (that could be a bad idea because there is for sure another software package depending on that version of protobuf).

from ecal.

OK, also I delete my _build Folder and change the cmake Parameter ECAL_THIRDPARTY_BUILD_PROTOBUF to OFF in cmakelist.txt Then I do every step again?
If I do this, I became the Error durring make -j: tal error: google/protobuf/compiler/parser.h: No such file or directory compilation terminated. contrib/ecalproto/src/CMakeFiles/proto.dir/build.make:86: recipe for target 'contrib/ecalproto/src/CMakeFiles/proto.dir/ecal_proto_dyn.cpp.o' failed

from ecal.

@famkoc : Did you succeed to solve that issue following @Kerstin-Keller tutorial ?

from ecal.