Build error due to CMake problem

[DemiMarie]

CMake Error at build/_deps/jsonnet-build/googletest-src/googletest/cmake/internal_utils.cmake:152 (add_library):
  add_library cannot create target "gtest" because another target with the
  same name already exists.  The existing target is a static library created
  in source directory
  "/home/user/sandboxed-api/build/_deps/googletest-src/googletest".  See
  documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  build/_deps/jsonnet-build/googletest-src/googletest/cmake/internal_utils.cmake:209 (cxx_library_with_type)
  build/_deps/jsonnet-build/googletest-src/googletest/CMakeLists.txt:131 (cxx_library)


CMake Error at build/_deps/jsonnet-build/googletest-src/googletest/cmake/internal_utils.cmake:152 (add_library):
  add_library cannot create target "gtest_main" because another target with
  the same name already exists.  The existing target is a static library
  created in source directory
  "/home/user/sandboxed-api/build/_deps/googletest-src/googletest".  See
  documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  build/_deps/jsonnet-build/googletest-src/googletest/cmake/internal_utils.cmake:209 (cxx_library_with_type)
  build/_deps/jsonnet-build/googletest-src/googletest/CMakeLists.txt:133 (cxx_library)


CMake Error at build/_deps/jsonnet-build/googletest-src/googletest/CMakeLists.txt:146 (target_link_libraries):
  Attempt to add link library "gtest" to target "gtest_main" which is not
  built in this directory.

  This is allowed only when policy CMP0079 is set to NEW.


CMake Error at build/_deps/jsonnet-build/googletest-src/googletest/cmake/internal_utils.cmake:152 (add_library):
  add_library cannot create target "gmock" because another target with the
  same name already exists.  The existing target is a static library created
  in source directory
  "/home/user/sandboxed-api/build/_deps/googletest-src/googlemock".  See
  documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  build/_deps/jsonnet-build/googletest-src/googletest/cmake/internal_utils.cmake:209 (cxx_library_with_type)
  build/_deps/jsonnet-build/googletest-src/googlemock/CMakeLists.txt:101 (cxx_library)


CMake Error at build/_deps/jsonnet-build/googletest-src/googlemock/CMakeLists.txt:102 (target_link_libraries):
  Attempt to add link library "gtest" to target "gmock" which is not built in
  this directory.

  This is allowed only when policy CMP0079 is set to NEW.


CMake Error at build/_deps/jsonnet-build/googletest-src/googletest/cmake/internal_utils.cmake:152 (add_library):
  add_library cannot create target "gmock_main" because another target with
  the same name already exists.  The existing target is a static library
  created in source directory
  "/home/user/sandboxed-api/build/_deps/googletest-src/googlemock".  See
  documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  build/_deps/jsonnet-build/googletest-src/googletest/cmake/internal_utils.cmake:209 (cxx_library_with_type)
  build/_deps/jsonnet-build/googletest-src/googlemock/CMakeLists.txt:104 (cxx_library)


CMake Error at build/_deps/jsonnet-build/googletest-src/googlemock/CMakeLists.txt:105 (target_link_libraries):
  Attempt to add link library "gmock" to target "gmock_main" which is not
  built in this directory.

  This is allowed only when policy CMP0079 is set to NEW.

[cblichmann]

Can you outline the exact commands you issued?

This looks like the build folder is in an odd state. Try deleting CMakeCache.txt and re-running cmake <PATH_TO_SAPI> -G Ninja -D SAPI_ENABLE_CONTRIB_TESTS=ON.

The same error may also happen when the GoogleTest module is included twice somewhere (usually via add_subdirectory(). Is jsonnet doing this?

[DemiMarie]

Can you outline the exact commands you issued?

This looks like the build folder is in an odd state. Try deleting CMakeCache.txt and re-running cmake <PATH_TO_SAPI> -G Ninja -D SAPI_ENABLE_CONTRIB_TESTS=ON.

I did find build -delete and re-ran CMake, and the problem persisted.

The same error may also happen when the GoogleTest module is included twice somewhere (usually via add_subdirectory(). Is jsonnet doing this?

I believe this is the cause.

[DemiMarie]

Duplicate of #153.