cmake dependency issue

[tmskz....@gmail.com]

Dear Devs,

it seems that the recent updates to the CMakeList.txt in kodo-rlnc contain changes, which will break the build process in certain cases (see the output at the end of my mail). I am building kodo as part of my cmake project via:

ExternalProject_Add(KODO_RLNC
                                     GIT_REPOSITORY ${KODO_RLNC_GIT}
                                     GIT_PROGRESS YES
                                     INSTALL_COMMAND ""

) 

This used to work perfectly, aside from the install target seemingly not being present. Can you advise me how I can adapt to the current version?

Thanks!

Bests,

Máté

# after calling make on my project (only the kodo configure step is shown).

[ 16%] Performing configure step for 'KODO_RLNC'

-- The C compiler identification is GNU 9.3.0

-- The CXX compiler identification is GNU 9.3.0

-- Check for working C compiler: /usr/bin/cc

-- Check for working C compiler: /usr/bin/cc -- works

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Detecting C compile features

-- Detecting C compile features - done

-- Check for working CXX compiler: /usr/bin/c++

-- Check for working CXX compiler: /usr/bin/c++ -- works

-- Detecting CXX compiler ABI info

-- Detecting CXX compiler ABI info - done

-- Detecting CXX compile features

-- Detecting CXX compile features - done

-- Resolving dependencies...

cmake -G "Unix Makefiles" . 

-- Resolving dependencies...

CMake Error at CMakeLists.txt:25 (add_subdirectory):

  add_subdirectory given source

  "/home/tomoskozi/workspace/arduino_network_codes/build/KODO_RLNC-prefix/src/KODO_RLNC/resolve_symlinks/storage"

  which is not an existing directory.

CMake Error at CMakeLists.txt:29 (add_subdirectory):

  add_subdirectory given source

  "/home/tomoskozi/workspace/arduino_network_codes/build/KODO_RLNC-prefix/src/KODO_RLNC/resolve_symlinks/hex"

  which is not an existing directory.

CMake Error at CMakeLists.txt:33 (add_subdirectory):

  add_subdirectory given source

  "/home/tomoskozi/workspace/arduino_network_codes/build/KODO_RLNC-prefix/src/KODO_RLNC/resolve_symlinks/endian"

  which is not an existing directory.

CMake Error at CMakeLists.txt:37 (add_subdirectory):

  add_subdirectory given source

  "/home/tomoskozi/workspace/arduino_network_codes/build/KODO_RLNC-prefix/src/KODO_RLNC/resolve_symlinks/fifi"

  which is not an existing directory.

CMake Error at CMakeLists.txt:41 (add_subdirectory):

  add_subdirectory given source

  "/home/tomoskozi/workspace/arduino_network_codes/build/KODO_RLNC-prefix/src/KODO_RLNC/resolve_symlinks/kodo-core"

  which is not an existing directory.

-- Configuring incomplete, errors occurred!

[Jeppe Pihl]

Hi Máté,

Thanks for letting us know. Interesting use case! I'll look into it tomorrow. If you have any ideas for a fix please let me know.

While you wait, maybe you can use the previous version.

Cheers,

Jeppe

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[Jeppe Pihl]

Hi Máté,

I made a github gist to show another approach which works for me.

https://gist.github.com/jpihl/cebcdf4566cfc7110046847614d3b973

Note this is using FetchContent rather than ExternalProject_Add, so you'll need at least cmake version 3.11.

Let me know how it goes.

Cheers,

Jeppe