Bump cmake minimum version to 3.13

TheMagnetar · web-flow · commit a5e7a0a90a95 · 2025-11-03T20:13:24.000+01:00
Having the minimum cmake version  lower than 3.13 will leave policies CMP0079 and CMP0077 unset. This will have conflicts with other projects that use cppzmq with add_subdirectory and that have a dependency on Catch2 as well to fail to compile.

Bumping the cmake_minimum_version to 3.13 prevents that.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.11)
+cmake_minimum_required(VERSION 3.13)
 
 list (APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-cmake_minimum_required(VERSION 3.11)`
	`1`	`+cmake_minimum_required(VERSION 3.13)`
`2`	`2`
`3`	`3`	`list (APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")`
`4`	`4`	`set(CMAKE_EXPORT_COMPILE_COMMANDS ON)`