# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

CMAKE_BUILD_TYPE="Release"
LLVM_COMPAT=( 22 )
PYTHON_COMPAT=( python3_{10..14} )

inherit cmake flag-o-matic llvm-r2 python-any-r1

DESCRIPTION="LLVM-based OpenCL compiler for OpenCL targetting Intel Gen graphics hardware"
HOMEPAGE="https://github.com/intel/intel-graphics-compiler"

SRC_URI="https://github.com/intel/${PN}/archive/refs/tags/v${PV}.tar.gz"

LICENSE="MIT"
SLOT="0/${PV}"
KEYWORDS="~amd64"
IUSE="debug intel_targets_gfx-bmg shared-libs vc"

DEPEND="
	dev-libs/opencl-clang:22[${LLVM_USEDEP}]
	dev-util/spirv-tools
	$(llvm_gen_dep '
		llvm-core/lld:${LLVM_SLOT}
		llvm-core/llvm:${LLVM_SLOT}
	')
	vc? (
		dev-libs/intel-vc-intrinsics:${LLVM_SLOT}=[${LLVM_USEDEP}]
		dev-util/spirv-llvm-translator:${LLVM_SLOT}=
	)
"

RDEPEND="
	!dev-util/intel-graphics-compiler:legacy
	${DEPEND}
"

BDEPEND="
	$(python_gen_any_dep 'dev-python/mako[${PYTHON_USEDEP}]')
	$(python_gen_any_dep 'dev-python/pyyaml[${PYTHON_USEDEP}]')
	$(llvm_gen_dep 'llvm-core/lld:${LLVM_SLOT}')
	${PYTHON_DEPS}
"

python_check_deps() {
	python_has_version "dev-python/mako[${PYTHON_USEDEP}]"
	python_has_version "dev-python/pyyaml[${PYTHON_USEDEP}]"
}

PATCHES=(
	"${FILESDIR}/${PN}-2.32.7-r2-llvm22.patch"
)

pkg_setup() {
	llvm-r2_pkg_setup
	python-any-r1_pkg_setup
}

#src_unpack() {
#	unpack "/var/git/${P}-local-r1.tar.gz"
#}

src_prepare() {
	local CLANG_HEADERS="${IGC_BUILD__CLANG_VERSION}/clang/lib/Headers"
	sed '/set\(CLANG_HEADERS/s/\$\{IGC_BUILD__GFX_DEV_SRC_DIR\}\/external\/llvm\/releases\/\$\{IGC_BUILD__CLANG_VERSION\}\/clang\/lib\/Headers\)/'"${CLANG_HEADERS}"'/' \
	  -i ${WORKIDR}/${P}/IGC/cmake/IRBuilderGeneratorCodeGen.cmake

	cmake_src_prepare
}
src_configure() {
	# Get LLVM version
	local llvm_version="$(best_version -d llvm-core/llvm:${LLVM_SLOT})"
	local llvm_version="${llvm_version%%-r*}"

	# See https://github.com/intel/intel-graphics-compiler/issues/212
	append-ldflags -Wl,-z,undefs

	# See bug #938519 and https://github.com/intel/intel-graphics-compiler/issues/362
	filter-lto

	# See bug #893370 and https://github.com/intel/intel-graphics-compiler/issues/282
	append-flags -U_GLIBCXX_ASSERTIONS

	# See https://bugs.gentoo.org/718824
	! use debug && append-cppflags -DNDEBUG
	local clang_exe="${EPREFIX}/usr/lib/ccache/bin/clang-${LLVM_SLOT}"
	[[ -x ${clang_exe} ]] || clang_exe="$(get_llvm_prefix)/bin/clang-${LLVM_SLOT}"
	local ccache_bin="$(type -P ccache)"
	local vc_platforms=()
	use intel_targets_gfx-bmg && vc_platforms+=( Xe2 )
	local vc_platforms_cmake=""
	if [[ ${#vc_platforms[@]} -gt 0 ]]; then
		local IFS=";"
		vc_platforms_cmake="${vc_platforms[*]}"
	fi

	local mycmakeargs=(
		-DBUILD_SHARED_LIBS=$(usex shared-libs)
		-DCCLANG_FROM_SYSTEM="ON"
		-DCLANG_EXE="${clang_exe}"
		-DCMAKE_POLICY_VERSION_MINIMUM=3.5
		-DCMAKE_PREFIX_PATH="$(get_llvm_prefix);/opt/intel/llvm/${LLVM_SLOT}"
		${ccache_bin:+-DCMAKE_C_COMPILER_LAUNCHER="${ccache_bin}"}
		${ccache_bin:+-DCMAKE_CXX_COMPILER_LAUNCHER="${ccache_bin}"}
		-DCMAKE_LIBRARY_PATH="$(get_llvm_prefix)/$(get_libdir)"
		-DIGC_BUILD__VC_ENABLED="$(usex vc)"
		-DIGC_OPTION__ARCHITECTURE_TARGET="Linux64"
		-DIGC_OPTION__CLANG_MODE="Prebuilds"
		-DIGC_OPTION__ENABLE_BF16_BIF="ON"
		-DIGC_OPTION__LINK_KHRONOS_SPIRV_TRANSLATOR="ON"
		-DIGC_OPTION__LLD_MODE="Prebuilds"
		-DIGC_OPTION__LLDELF_H_DIR="$(get_llvm_prefix)/include/lld/Common"
		-DIGC_OPTION__LLVM_MODE="Prebuilds"
		-DIGC_OPTION__LLVM_PREFERRED_VERSION="${llvm_version##*-}"
		-DIGC_OPTION__OPENCL_HEADER_PATH="/usr/lib/clang/${LLVM_SLOT}/include/opencl-c.h"
		-DIGC_OPTION__SPIRV_TOOLS_MODE="Prebuilds"
		-DIGC_OPTION__SPIRV_TRANSLATOR_MODE="Prebuilds"
		-DIGC_OPTION__USE_PREINSTALLED_SPIRV_HEADERS="ON"
		${vc_platforms_cmake:+-DIGC_BUILD__VC_PLATFORMS="${vc_platforms_cmake}"}
		$(usex vc '-DIGC_OPTION__VC_INTRINSICS_MODE=Prebuilds' '')
		-DPYTHON_EXECUTABLE="${PYTHON}"
		-DSPIRVLLVMTranslator_INCLUDE_DIR="${EPREFIX}/usr/lib/llvm/${LLVM_SLOT}/include/LLVMSPIRVLib"
		-Wno-dev
	)

	cmake_src_configure
}