[Buildroot] [PATCH v1 1/1] package/pkg-cmake.mk: force config version >=3.5

[Christian Stewart]

Some packages have CMakeLists.txt requiring CMake <3.5.

Newer CMake forces at minimum version 3.5, leading to build failures:

https://github.com/skiffos/SkiffOS/actions/runs/14208988354/job/39812576139#step:8:638
https://github.com/skiffos/SkiffOS/actions/runs/14211566256/job/39819600184#step:8:26664

Add the suggested build flag to force version 3.5.x and fix the error:

  -DCMAKE_POLICY_VERSION_MINIMUM=3.5

This is applied to all cmake packages to force 3.5 as a minimum.

Signed-off-by: Christian Stewart <christian at aperture.us>
---
 package/pkg-cmake.mk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/package/pkg-cmake.mk b/package/pkg-cmake.mk
index c7032312fb..7bff3851cf 100644
--- a/package/pkg-cmake.mk
+++ b/package/pkg-cmake.mk
@@ -53,6 +53,10 @@ define inner-cmake-package
 
 $(3)_SUPPORTS_IN_SOURCE_BUILD ?= YES
 
+# Some packages requires CMake 3.0.0 but latest CMake requires >=3.5
+# Set the policy version minimum to force these packages to 3.5 or greater.
+$(2)_CONF_OPTS += -DCMAKE_POLICY_VERSION_MINIMUM=3.5
+
 # The default backend, unless specified by the package
 $(3)_CMAKE_BACKEND ?= make
 
-- 
2.39.5