CMake operation generates warnings and errors.

[NanXiao]

My OS is Arch Linux, and the cmake version is 3.10.1. When doing cmake, it generates following warnings and errors:

......
CMake Warning (dev) at /usr/share/cmake-3.10/Modules/GoogleTest.cmake:254 (if):
  Policy CMP0057 is not set: Support new IN_LIST if() operator.  Run "cmake
  --help-policy CMP0057" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  IN_LIST will be interpreted as an operator when the policy is set to NEW.
  Since the policy is not set the OLD behavior will be used.
Call Stack (most recent call first):
  CMakeLists.txt:77 (GTEST_ADD_TESTS)
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Error at /usr/share/cmake-3.10/Modules/GoogleTest.cmake:254 (if):
  if given arguments:

    "unit-tests" "IN_LIST" "allKeywords"

  Unknown arguments specified
Call Stack (most recent call first):
  CMakeLists.txt:77 (GTEST_ADD_TESTS)


-- Configuring incomplete, errors occurred!
......

Could you help to check it? Thanks very much in advance!

[tbennun]

It seems to me that the issue is in gtest's CMake. Which version are you using?

[NanXiao]

@tbennun CMake is 3.10.1 and gtest is 1.8.0, thanks!

[tbennun]

Can you test this with 1.7.0 instead? Thanks.

[NanXiao]

Because Arch Linux shipped with gtest 1.8.0 by default. I need to check how to roll back to old version. BTW, is it possible for you do some modification? Then I can do test on gtest 1.8.0. Thanks!

[tbennun]

If you extract gtest to win/gtest, CMake should detect this automatically and use it instead.

https://github.com/google/googletest/archive/release-1.7.0.zip

[NanXiao]

I use gtest_discover_tests which introduced in CMake 3.10 to replace gtest_add_tests, and the cmake process can succeed.

[multiplemonomials]

FWIW, this is caused by a bug in certain versions of CMake. I reported it, and it will be fixed in new releases (v3.12.1 and above).

The workaround for the broken versions is to stick a

cmake_policy(SET CMP0057 NEW)

in your CMake scripts somewhere before calling find_package(GTest).

[tbennun]

interesting.. Can you create a PR please? Should be relatively short

[yugaoxiang]

cmake version 3.22.1 也报错了