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Merge topic 'export-cmake-policy-version-range'

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ca24b70d31 Export: Specify a policy range in exported files

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4755
This commit is contained in:
Brad King
2020-05-20 13:04:51 +00:00
committed by Kitware Robot
parent 1c73776e0b ca24b70d31
commit bceca2fb47
1 changed files with 6 additions and 4 deletions
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10
Source/cmExportFileGenerator.cxx
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@@ -923,12 +923,14 @@ void cmExportFileGenerator::GeneratePolicyHeaderCode(std::ostream& os)
/* clang-format on */
// Isolate the file policy level.
// We use 2.6 here instead of the current version because newer
// versions of CMake should be able to export files imported by 2.6
// until the import format changes.
// Support CMake versions as far back as 2.6 but also support using NEW
// policy settings for up to CMake 3.17 (this upper limit may be reviewed
// and increased from time to time). This reduces the opportunity for CMake
// warnings when an older export file is later used with newer CMake
// versions.
/* clang-format off */
os << "cmake_policy(PUSH)\n"
<< "cmake_policy(VERSION 2.6)\n";
<< "cmake_policy(VERSION 2.6...3.17)\n";
/* clang-format on */
}