libebml: 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, 43 insertions, 2 deletions

diff --git a/meta-multimedia/recipes-mkv/libebml/libebml/0001-allow-build-with-cmake-4.patch b/meta-multimedia/recipes-mkv/libebml/libebml/0001-allow-build-with-cmake-4.patch
new file mode 100644
index 0000000000..f62d412ac4
--- /dev/null
+++ b/meta-multimedia/recipes-mkv/libebml/libebml/0001-allow-build-with-cmake-4.patch
@@ -0,0 +1,40 @@
+From b54451a2cc63672284c7768ecf5562214826ea50 Mon Sep 17 00:00:00 2001
+From: Alper Ak <alperyasinak1@gmail.com>
+Date: Tue, 8 Jul 2025 17:15:08 +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: Backport [https://github.com/Matroska-Org/libebml/commit/cc63f6b3ed2007a3ef04206a26f9ad5a657331bd]
+
+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 b168a38..a8b789f 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -1,4 +1,4 @@
+-cmake_minimum_required(VERSION 3.1.2)
++cmake_minimum_required(VERSION 3.5)
+ 
+ project(ebml VERSION 1.4.5)
+ 
+-- 
+2.43.0
+
diff --git a/meta-multimedia/recipes-mkv/libebml/libebml_1.4.5.bb b/meta-multimedia/recipes-mkv/libebml/libebml_1.4.5.bb
index 4b439e2ca5..1bc56b788b 100644
--- a/meta-multimedia/recipes-mkv/libebml/libebml_1.4.5.bb
+++ b/meta-multimedia/recipes-mkv/libebml/libebml_1.4.5.bb
@@ -3,9 +3,10 @@ HOMEPAGE = "https://github.com/Matroska-Org/libebml"
 LICENSE = "LGPL-2.1-only"
 LIC_FILES_CHKSUM = "file://LICENSE.LGPL;md5=4fbd65380cdd255951079008b364516c"
 
-SRC_URI = "git://github.com/Matroska-Org/libebml.git;branch=v1.x;protocol=https"
-SRCREV = "1878e784321673561039a6a37076b2736f4dc98f"
+SRC_URI = "git://github.com/Matroska-Org/libebml.git;branch=v1.x;protocol=https \
+        file://0001-allow-build-with-cmake-4.patch"
 
+SRCREV = "1878e784321673561039a6a37076b2736f4dc98f"
 
 inherit pkgconfig cmake dos2unix