CMAKE compilation not working on Ubuntu 16.04

[juliend2]

I'm on Ubuntu 16.04.7 LTS and I tried compiling this project by using the CMAKE compiler.

But I had this problematic output when doing the cmake command:

deploy@yamada:~/robotstxt/c-build⟫ cmake .. -DROBOTS_BUILD_TESTS=ON
-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is GNU 5.4.0
-- 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
-- Configuring done
-- Generating done
-- Build files have been written to: /home/deploy/robotstxt/c-build/libs
Scanning dependencies of target googletest
[  5%] Creating directories for 'googletest'
[ 11%] Performing download step (git clone) for 'googletest'
-- Avoiding repeated git clone, stamp file is up to date: '/home/deploy/robotstxt/c-build/libs'
[ 16%] No patch step for 'googletest'
[ 22%] Performing update step for 'googletest'
fatal: Needed a single revision
invalid upstream GIT_PROGRESS/master
No rebase in progress?
CMake Error at /home/deploy/robotstxt/c-build/libs/googletest-prefix/tmp/googletest-gitupdate.cmake:105 (message):


  Failed to rebase in: '/'.

  You will have to resolve the conflicts manually


CMakeFiles/googletest.dir/build.make:95: recipe for target 'googletest-prefix/src/googletest-stamp/googletest-update' failed
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/googletest.dir/all' failed
make[2]: *** [googletest-prefix/src/googletest-stamp/googletest-update] Error 1
make[1]: *** [CMakeFiles/googletest.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
CMake Error at CMakeLists.txt:73 (MESSAGE):
  Failed to download dependencies: 2


-- Configuring incomplete, errors occurred!
See also "/home/deploy/robotstxt/c-build/CMakeFiles/CMakeOutput.log".

Note: My version of git is 2.7.4.

Do you have an idea why this is not working?