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Silence CMake Policy 0063 warning (#790)

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Summary:
- When google benchmark is used as a submodule in a parent projects
  whose min CMake version is 3.3.2 or later, the google benchmark
  `CMakeLists.txt` triggers a warning regarding CMake policy 0063:

```
CMake Warning (dev) at tests/googlebenchmark/src/CMakeLists.txt:19 (add_library):
  Policy CMP0063 is not set: Honor visibility properties for all target
  types.  Run "cmake --help-policy CMP0063" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.

  Target "benchmark" of type "STATIC_LIBRARY" has the following visibility
  properties set for CXX:

    CXX_VISIBILITY_PRESET
    VISIBILITY_INLINES_HIDDEN

  For compatibility CMake is not honoring them for this target.
This warning is for project developers.  Use -Wno-dev to suppress it.
```

- Set CMake Policy 0063 to NEW if the policy is available. This will not
  affect parent projects who include benchmark but do not have a CMake min
  version of 3.3.2 or later, i.e. when this policy is introduced.
This commit is contained in:
Joseph Loser 2019-04-05 04:43:47 -06:00 committed by Dominic Hamon
parent 6a5c379caf
commit 3bc802e47c
1 changed files with 1 additions and 0 deletions
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1
CMakeLists.txt
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@ -5,6 +5,7 @@ foreach(p
CMP0054 # CMake 3.1
CMP0056 # export EXE_LINKER_FLAGS to try_run
CMP0057 # Support no if() IN_LIST operator
CMP0063 # Honor visibility properties for all targets
)
if(POLICY ${p})
cmake_policy(SET ${p} NEW)