export: Increase maximum policy version in exported files to 3.20

The files generatd by `install(EXPORT)` and `export()` commands
are known to work with policies as of CMake 3.20, so enable them
in sufficiently new CMake versions.
This commit is contained in:
Brad King 2021-06-30 09:41:37 -04:00
parent d76cb12905
commit 83a3db5631

View File

@ -924,13 +924,13 @@ void cmExportFileGenerator::GeneratePolicyHeaderCode(std::ostream& os)
// Isolate the file policy level.
// Support CMake versions as far back as 2.6 but also support using NEW
// policy settings for up to CMake 3.19 (this upper limit may be reviewed
// policy settings for up to CMake 3.20 (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...3.19)\n";
<< "cmake_policy(VERSION 2.6...3.20)\n";
/* clang-format on */
}