kmscon: fix zlib cross-compiling errors

zlib compression was introduced in version 9.3.3. However, when
cross-compiling kmscon for an architecture other than x86_64, the
genunifont executable tries to use the build-systems zlib instead
of the hosts zlib.

This leads to the following error during compiling:
libz.so: error adding symbols: file in wrong format

Fix this by adding a new native zlib dependency specifically for the
genunifont executable.

Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

meta-oe/recipes-graphics/kmscon/files/0001-fix-zlib-cross-compiling-errors.patch

@@ -0,0 +1,51 @@
+From 0ff9beddd959ec9afc99f64789fdfb959842ba52 Mon Sep 17 00:00:00 2001
+From: Adam Duskett <adam.duskett@amarulasolutions.com>
+Date: Thu, 21 May 2026 16:30:27 +0200
+Subject: [PATCH 1/1] fix zlib cross-compiling errors
+
+zlib compression was introduced in version 9.3.3. However, when
+cross-compiling kmscon for an architecture other than x86_64, the
+genunifont executable tries to use the build-systems zlib instead
+of the hosts zlib.
+
+This leads to the following error during compiling:
+libz.so: error adding symbols: file in wrong format
+
+Fix this by adding a new native zlib dependency specifically for the
+genunifont executable.
+
+Upstream-Status: Submitted [https://github.com/kmscon/kmscon/pull/402]
+Signed-off-by: Adam Duskett <adam.duskett@amarulasolutions.com>
+---
+ meson.build     | 1 +
+ src/meson.build | 2 +-
+ 2 files changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/meson.build b/meson.build
+index f7c0858..74cf595 100644
+--- a/meson.build
++++ b/meson.build
+@@ -52,6 +52,7 @@ libudev_deps = dependency('libudev', version: '>=172')
+ dl_deps = dependency('dl')
+ threads_deps = dependency('threads')
+ zlib_deps = dependency('zlib')
++zlib_deps_native = dependency('zlib', native: true)
+ 
+ python = find_program('python3')
+ 
+diff --git a/src/meson.build b/src/meson.build
+index 63d38ca..070e2a4 100644
+--- a/src/meson.build
++++ b/src/meson.build
+@@ -159,7 +159,7 @@ endif
+ # Unifont Generator
+ # This generates the unifont sources from raw hex-encoded font data.
+ #
+-genunifont = executable('genunifont', 'genunifont.c', dependencies: [zlib_deps], native: true)
++genunifont = executable('genunifont', 'genunifont.c', dependencies: [zlib_deps_native], native: true)
+ 
+ unifont_bin = custom_target('unifont-bin',
+   input: ['font_unifont_data.hex'],
+-- 
+2.54.0
+

meta-oe/recipes-graphics/kmscon/kmscon_9.3.5.bb

@@ -20,7 +20,10 @@ DEPENDS = "\
     zlib \
 "
 
-SRC_URI = "git://github.com/kmscon/kmscon;protocol=https;branch=main;tag=v${PV}"
+SRC_URI = "\
+    git://github.com/kmscon/kmscon;protocol=https;branch=main;tag=v${PV} \
+    file://0001-fix-zlib-cross-compiling-errors.patch \
+"
 SRCREV = "a8832afb1dcca5bb4c0476d4c13c7239fecbd93a"
 
 inherit meson pkgconfig systemd