From 5b2ceba7f233ff59e6035c9b4d6950b0e617ee41 Mon Sep 17 00:00:00 2001
From: Rudi Heitbaum <rudi@heitbaum.com>
Date: Sun, 11 May 2025 05:49:56 +0000
Subject: [PATCH] mesa: host: enable build of reusable tools

strip the tools and apply upx
create a tar file of the reusable mesa:host tools
---
 distributions/LibreELEC/options   |  8 ++++++++
 packages/graphics/mesa/package.mk | 23 +++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/distributions/LibreELEC/options b/distributions/LibreELEC/options
index f01cbd74d3..dbf13ea55f 100644
--- a/distributions/LibreELEC/options
+++ b/distributions/LibreELEC/options
@@ -270,3 +270,11 @@
 # for a list of additional drivers see packages/linux-driver-addons
 # Space separated list is supported,
   DRIVER_ADDONS="crazycat digital_devices dvb-latest"
+
+# should reusable host tools be built:
+# Space separated list is supported,
+# list of options are:
+#   - all (for all host tools to be built)
+#   - mesa:host
+#   - save-local (saves a copy in sources/reusable/<package>
+  BUILD_REUSABLE=""
diff --git a/packages/graphics/mesa/package.mk b/packages/graphics/mesa/package.mk
index 3d2bc91349..acd5f15b21 100644
--- a/packages/graphics/mesa/package.mk
+++ b/packages/graphics/mesa/package.mk
@@ -120,6 +120,29 @@ fi
 makeinstall_host() {
   host_files="src/compiler/clc/mesa_clc src/compiler/spirv/vtn_bindgen2 src/panfrost/clc/panfrost_compile"
 
+  if listcontains "${BUILD_REUSABLE}" "(all|mesa:host)"; then
+    # Build the reusable mesa:host for both local and to be added to a GitHub release
+    strip ${host_files}
+    upx --lzma ${host_files}
+
+    REUSABLE_SOURCES="${SOURCES}/mesa-reusable"
+    MESA_HOST="mesa-reusable-${OS_VERSION}-${PKG_VERSION}"
+    REUSABLE_SOURCE_NAME=${MESA_HOST}-${MACHINE_HARDWARE_NAME}.tar
+
+    mkdir -p "${TARGET_IMG}"
+
+    tar cf ${TARGET_IMG}/${REUSABLE_SOURCE_NAME} --transform='s|.*/||' ${host_files}
+    sha256sum ${TARGET_IMG}/${REUSABLE_SOURCE_NAME} | \
+      cut -d" " -f1 >${TARGET_IMG}/${REUSABLE_SOURCE_NAME}.sha256
+
+    if listcontains "${BUILD_REUSABLE}" "save-local"; then
+      mkdir -p "${REUSABLE_SOURCES}"
+      cp -p ${TARGET_IMG}/${REUSABLE_SOURCE_NAME} ${REUSABLE_SOURCES}
+      cp -p ${TARGET_IMG}/${REUSABLE_SOURCE_NAME}.sha256 ${REUSABLE_SOURCES}
+      echo "save-local" >${REUSABLE_SOURCES}/${REUSABLE_SOURCE_NAME}.url
+    fi
+  fi
+
   mkdir -p "${TOOLCHAIN}/bin"
     cp -a ${host_files} "${TOOLCHAIN}/bin"
 }