Update minimum CMake version (#793)

The use of CACHE in the SNMALLOC_STATIC_LIBRARY_PREFIX was not correctly handled by cmake before 3.21.

> The “set(CACHE)” command no longer removes a normal variable of the
same name, if any. See policy “CMP0126”.

Changing the minimum version means that containing projects can do:

```CMake
set(SNMALLOC_STATIC_LIBRARY_PREFIX "my_prefix")
```

Without this, there were weird behaviours that the first compile used "sn_" and then subsequent compiles used "my_prefix".

Thanks to @achamayou for debugging this in CCF. https://github.com/microsoft/CCF/pull/7161

This commit is contained in:

Matthew Parkinson

2025-08-05 11:19:42 +01:00

committed by

GitHub

parent 452fcc44b0

commit 3385660fd7

1 changed files with 1 additions and 1 deletions

									
										2

CMakeLists.txt
									
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				@@ -1,4 +1,4 @@

				cmake_minimum_required(VERSION 3.14)

				cmake_minimum_required(VERSION 3.21)

				project(snmalloc CXX)

				if (NOT CMAKE_BUILD_TYPE)

Update minimum CMake version (#793)

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CMakeLists.txt

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