serial: Add patch for CMake 4+ compatibility

Fix:

| CMake Error at CMakeLists.txt:1 (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>

2 files changed, 41 insertions, 0 deletions

diff --git a/meta-oe/recipes-support/serial/serial/0002-allow-build-with-cmake-4.patch b/meta-oe/recipes-support/serial/serial/0002-allow-build-with-cmake-4.patch
new file mode 100644
index 0000000000..7dba62429c
--- /dev/null
+++ b/meta-oe/recipes-support/serial/serial/0002-allow-build-with-cmake-4.patch
@@ -0,0 +1,40 @@
+From 35fe02e5376fd1372fd5feaee5b9148744ed77eb Mon Sep 17 00:00:00 2001
+From: Alper Ak <alperyasinak1@gmail.com>
+Date: Wed, 9 Jul 2025 19:54:57 +0300
+Subject: [PATCH] cmake: Set minimum required version to 3.5 for CMake 4+
+ compatibility
+
+Fix:
+
+| CMake Error at CMakeLists.txt:1 (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/wjwwood/serial/pull/311]
+
+Signed-off-by: Alper Ak <alperyasinak1@gmail.com>
+---
+ CMakeLists.txt | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 0e4ede8..d03e39b 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,4 +1,4 @@
+-cmake_minimum_required(VERSION 2.8.3)
++cmake_minimum_required(VERSION 3.5)
+ project(serial)
+ set (SERIAL_VERSION_MAJOR 1)
+ set (SERIAL_VERSION_MINOR 2)
+-- 
+2.43.0
+
diff --git a/meta-oe/recipes-support/serial/serial_1.2.1.bb b/meta-oe/recipes-support/serial/serial_1.2.1.bb
index 42151da532..654173fa38 100644
--- a/meta-oe/recipes-support/serial/serial_1.2.1.bb
+++ b/meta-oe/recipes-support/serial/serial_1.2.1.bb
@@ -7,6 +7,7 @@ SRC_URI = " \
     git://github.com/wjwwood/${BPN}.git;protocol=https;branch=main \
     file://Findcatkin.cmake \
     file://0001-Add-SOVERSION-for-shared-lib-and-comment-example.patch \
+    file://0002-allow-build-with-cmake-4.patch \
 "
 SRCREV = "10ac4e1c25c2cda1dc0a32a8e12b87fd89f3bb4f"
 SRC_URI[sha256sum] = "c8cd235dda2ef7d977ba06dfcb35c35e42f45cfd9149ba3ad257756123d8ff96"