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Fix use with CMake 3.21 and older

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The minimum required CMake version is 3.16 but CMP0127 was only
introduced in 3.22. This results in errors with versions 3.16 - 3.21:

```
CMake Error at CMakeLists.txt:28 (cmake_policy):

  Policy "CMP0127" is not known to this version of CMake.
```

Fixed by only setting the policy when it's actually available.
This commit is contained in:
Severin Leonhardt
2024-08-27 09:40:48 +02:00
parent cc0bee4fd4
commit 5e786476dd
1 changed files with 2 additions and 0 deletions
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2
CMakeLists.txt
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@@ -20,7 +20,9 @@ option(TOML11_PRECOMPILE "precompile toml11 library" OFF)
include(CMakeDependentOption)
cmake_policy(PUSH)
if(POLICY CMP0127)
cmake_policy(SET CMP0127 OLD) # syntax of condition changed in 3.22
endif()
cmake_dependent_option(TOML11_INSTALL "install toml11 library" ON
"${CMAKE_PROJECT_NAME} STREQUAL ${PROJECT_NAME}" OFF)
cmake_dependent_option(TOML11_BUILD_EXAMPLES "build toml11 examples" OFF