flatcc: Add patch for CMake 4+ compatibility

Fix:

| CMake Error at CMakeLists.txt:2 (cmake_minimum_required):
|   Compatibility with CMake < 3.5 has been removed from CMake.
|
|   Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
|   to tell CMake that the project requires at least <min> but has been updated
|   to work with policies introduced by <max> or earlier.
|
|   Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
|
|
| -- Configuring incomplete, errors occurred!

Signed-off-by: Alper Ak <alperyasinak1@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-devtools/flatcc/flatcc/0002-allow-build-with-cmake-4.patch

@@ -0,0 +1,52 @@
+From 4a53680194dac08b8f0247a7f3459c95ce0fddbb Mon Sep 17 00:00:00 2001
+From: Alper Ak <alperyasinak1@gmail.com>
+Date: Wed, 9 Jul 2025 13:03:33 +0300
+Subject: [PATCH] cmake: Set minimum required version to 3.5 for CMake 4+
+ compatibility
+
+Fix:
+
+| CMake Error at CMakeLists.txt:2 (cmake_minimum_required):
+|   Compatibility with CMake < 3.5 has been removed from CMake.
+|
+|   Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
+|   to tell CMake that the project requires at least <min> but has been updated
+|   to work with policies introduced by <max> or earlier.
+|
+|   Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
+|
+|
+| -- Configuring incomplete, errors occurred!
+
+Upstream-Status: Submitted [https://github.com/dvidelabs/flatcc/pull/349]
+
+Signed-off-by: Alper Ak <alperyasinak1@gmail.com>
+---
+ CMakeLists.txt               | 2 +-
+ external/hash/CMakeLists.txt | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index cb6715a..b69b0bb 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,5 +1,5 @@
+ # Ubuntu 14.04 (Trusty)
+-cmake_minimum_required (VERSION 2.8.12.2)
++cmake_minimum_required (VERSION 3.5)
+ # Centos 7
+ #cmake_minimum_required (VERSION 2.8.11)
+ #cmake_minimum_required (VERSION 2.8)
+diff --git a/external/hash/CMakeLists.txt b/external/hash/CMakeLists.txt
+index 7b7d990..12eb3da 100644
+--- a/external/hash/CMakeLists.txt
++++ b/external/hash/CMakeLists.txt
+@@ -1,4 +1,4 @@
+-cmake_minimum_required (VERSION 3.0.2)
++cmake_minimum_required (VERSION 3.5)
+ 
+ project (HashTest)
+ 
+-- 
+2.43.0
+

meta-oe/recipes-devtools/flatcc/flatcc_git.bb

@@ -11,10 +11,10 @@ PV = "0.6.2+git"
 SRC_URI = " \
            git://github.com/dvidelabs/flatcc.git;protocol=https;branch=master \
            file://0001-Check-for-C-standard-version-23-for-__fallthrough__.patch \
+           file://0002-allow-build-with-cmake-4.patch \
 "
 SRCREV = "1653ec964730ec7d9892a08a1695ada6d20f5196"
 
-
 inherit cmake
 
 # Enable installation for target