Minimum CMake version is too low

[Kobzol]

The minimum supported CMake version is currently set to 3.13.4 (https://github.com/llvm/llvm-project/blob/main/llvm/CMakeLists.txt#L3). However, the bolt subproject uses the TYPE parameter for the install command (https://github.com/llvm/llvm-project/blob/main/bolt/tools/driver/CMakeLists.txt#L38), which does not seem to work in this version. It seems that the minimum CMake version should be bumped to 3.14.0.

CMake 3.13: https://cmake.org/cmake/help/v3.13/command/install.html#programs (TYPE is missing)
CMake 3.14: https://cmake.org/cmake/help/v3.14/command/install.html#programs (TYPE is present)

I hit this while trying to build BOLT with LLVM 3.13.4 in a rustc CI workflow.

This has also been noticed in other projects: https://github.com/coelckers/prboom-plus/pull/126/files.

[llvmbot]

@llvm/issue-subscribers-bolt

[nikic]

It would be preferable to make it compatible with cmake 3.13.4 instead. It's annoying/confusing to have a single subproject with a different cmake version requirement.

[tschuett]

https://reviews.llvm.org/D120625

[aaupov]

@tschuett, @nikic
I've put up this diff before I saw the comment about different cmake requirements. I agree with it, so will try to remove/rework the incompatible line to stay compatible with the LLVM CMake requirement.

[aaupov]

It would be preferable to make it compatible with cmake 3.13.4 instead. It's annoying/confusing to have a single subproject with a different cmake version requirement.

https://reviews.llvm.org/D121012

[aaupov]

Committed to both main and release/14.x