From c497f3c601653740e7b450e8ee9b14253073f7d8 Mon Sep 17 00:00:00 2001
From: Jia Yuan Lo <jylo06g@gmail.com>
Date: Tue, 31 Aug 2021 20:43:33 +0800
Subject: [PATCH] new package: clvk

---
 packages/clvk/build.sh | 90 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 packages/clvk/build.sh

diff --git a/packages/clvk/build.sh b/packages/clvk/build.sh
new file mode 100644
index 000000000..e338f5d98
--- /dev/null
+++ b/packages/clvk/build.sh
@@ -0,0 +1,90 @@
+TERMUX_PKG_HOMEPAGE=https://github.com/kpet/clvk
+TERMUX_PKG_DESCRIPTION="Experimental implementation of OpenCL on Vulkan"
+TERMUX_PKG_LICENSE="Apache-2.0"
+TERMUX_PKG_MAINTAINER="@termux"
+TERMUX_PKG_VERSION=0.0.20210829
+_COMMIT=2797e13ee3b03cbc97bc2afa3e99fc35d6a0c831
+TERMUX_PKG_SRCURL=https://github.com/kpet/clvk.git
+TERMUX_PKG_GIT_BRANCH=master
+TERMUX_PKG_BUILD_DEPENDS="vulkan-loader-android"
+TERMUX_PKG_DEPENDS="libc++"
+TERMUX_PKG_SUGGESTS="ocl-icd"
+TERMUX_PKG_HOSTBUILD=true
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
+-DLLVM_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/llvm-tblgen
+-DCLANG_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/clang-tblgen
+"
+
+# clvk currently does not have proper versioning nor releases
+# Use dates and commits as versioning for now
+
+# clvk prefers Khronos Vulkan Loader than the one come from NDK
+# Sticking with NDK should expose more Vulkan limitations in Android (like below)
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS+="
+-DCLVK_VULKAN_IMPLEMENTATION=custom
+-DVulkan_INCLUDE_DIRS=$TERMUX_PKG_SRCDIR/external/Vulkan-Headers/include
+-DVulkan_LIBRARIES=vulkan
+"
+
+# clvk build test fail when linking with API 24 libvulkan.so
+# clvk likely wont work on Android versions older than Android 9 (API 28)
+#
+# [1877/1888] Linking CXX executable api_tests
+# FAILED: api_tests
+# ...
+# libOpenCL.so: error: undefined reference to 'vkGetPhysicalDeviceFeatures2'
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" -DCLVK_BUILD_TESTS=OFF"
+
+# clvk libOpenCL.so has a hardcoded path clspv bin at build time
+# clvk cant automatically find clspv from PATH env var
+# and rely on CLVK_CLSPV_BIN env var
+# Use CLVK_CLSPV_ONLINE_COMPILER=1 to combine clspv with clvk
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" -DCLVK_CLSPV_ONLINE_COMPILER=1"
+
+termux_step_post_get_source() {
+	git pull
+	git reset --hard ${_COMMIT}
+	git submodule foreach --recursive git reset --hard
+	./external/clspv/utils/fetch_sources.py --deps llvm
+}
+
+termux_step_host_build() {
+	termux_setup_cmake
+	termux_setup_ninja
+
+	cmake \
+		-G Ninja \
+		-DLLVM_ENABLE_PROJECTS='clang' \
+		"$TERMUX_PKG_SRCDIR/external/clspv/third_party/llvm/llvm"
+	cmake \
+		--build "$TERMUX_PKG_HOSTBUILD_DIR" \
+		-j "$TERMUX_MAKE_PROCESSES" \
+		--target llvm-tblgen clang-tblgen
+}
+
+termux_step_pre_configure() {
+	# from packages/libllvm/build.sh
+	export LLVM_DEFAULT_TARGET_TRIPLE=${CCTERMUX_HOST_PLATFORM/-/-unknown-}
+	export LLVM_TARGET_ARCH
+	if [ $TERMUX_ARCH = "arm" ]; then
+		LLVM_TARGET_ARCH=ARM
+	elif [ $TERMUX_ARCH = "aarch64" ]; then
+		LLVM_TARGET_ARCH=AArch64
+	elif [ $TERMUX_ARCH = "i686" ] || [ $TERMUX_ARCH = "x86_64" ]; then
+		LLVM_TARGET_ARCH=X86
+	else
+		termux_error_exit "Invalid arch: $TERMUX_ARCH"
+	fi
+
+	TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" -DLLVM_TARGET_ARCH=$LLVM_TARGET_ARCH"
+	TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" -DLLVM_TARGETS_TO_BUILD=$LLVM_TARGET_ARCH"
+	TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" -DLLVM_HOST_TRIPLE=$LLVM_DEFAULT_TARGET_TRIPLE"
+}
+
+termux_step_make_install() {
+	# clvk has a very basic install rule
+	install -Dm644 "$TERMUX_PKG_BUILDDIR/libOpenCL.so" "$TERMUX_PREFIX/lib/clvk/libOpenCL.so"
+
+	echo "$TERMUX_PREFIX/lib/clvk/libOpenCL.so" > "$TERMUX_PKG_TMPDIR/clvk.icd"
+	install -Dm644 "$TERMUX_PKG_TMPDIR/clvk.icd" "$TERMUX_PREFIX/etc/OpenCL/vendors/clvk.icd"
+}