build: Drop minimum CMake version to 3.18

This is to keep supporting Debian 11 for a while longer.

Note that 8648532e3cdcd6a0c4fb12b65e1ca9a8972a1e06 requires CMake > 3.16
(not sure whether 3.17 works), so dropping back to 3.15 is not possible.

Closes #1611.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4bdd7cd3d1d6add5633e11d6020f76d0e395f2d7..6ed89db9a07167c1944b1eb7cff8c0de01f5b997 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.22)
+cmake_minimum_required(VERSION 3.18)
 
 project(ccache LANGUAGES C CXX ASM ASM_MASM)
 if(MSVC)