name='lib32-llvm18'
version='18.1.8'
release='2'
desc='32-bit LLVM libraries for Mesa'
desc_ru='32-битные библиотеки LLVM для Mesa'
homepage='https://llvm.org/'
maintainer='Evgeniy Khramov <xpamych@yandex.ru>'
maintainer_ru='Евгений Храмов <xpamych@yandex.ru>'
license='Apache-2.0 WITH LLVM-exception'
architectures=('amd64')
min_alr_version='v0.0.14'

# Runtime dependencies
deps=(
	'llvm18-libs(x86-32)'
)

deps_redos=(
	'llvm18-libs(x86-32)'
)

# Build dependencies
build_deps=(
	'cmake'
	'ninja-build'
	'gcc'
	'gcc-c++'
	'python3'
	'python3-devel'
	'zlib-devel.i686'
	'libzstd-devel.i686'
	'libxml2-devel.i686'
	'ncurses-devel.i686'
	'libedit-devel.i686'
	'libffi-devel.i686'
	'glibc-devel.i686'
)

build_deps_redos=("${build_deps[@]}")

# Provides 32-bit LLVM libraries
provides=(
	'lib32-llvm18'
	'llvm18-libs.i686'
	'llvm18-devel.i686'
)

_pkgver="${version}"

sources=("https://github.com/llvm/llvm-project/releases/download/llvmorg-${_pkgver}/llvm-project-${_pkgver}.src.tar.xz")
checksums=('SKIP')

prepare() {
	cd "$srcdir/llvm-project-${_pkgver}.src"
	echo "==> Preparing LLVM ${version} (32-bit)..."
}

build() {
	cd "$srcdir/llvm-project-${_pkgver}.src/llvm"

	export CFLAGS="-m32 -O2 -g1"
	export CXXFLAGS="-m32 -O2 -g1"
	export LDFLAGS="-m32"
	export PKG_CONFIG_PATH="/usr/lib/pkgconfig:/usr/share/pkgconfig"

	echo "==> Configuring LLVM (32-bit) with CMake..."
	cmake -B build -G Ninja \
		-DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_INSTALL_PREFIX=/usr \
		-DCMAKE_C_FLAGS="-m32" \
		-DCMAKE_CXX_FLAGS="-m32" \
		-DLLVM_LIBDIR_SUFFIX="" \
		-DLLVM_TARGET_ARCH=i686 \
		-DLLVM_DEFAULT_TARGET_TRIPLE=i686-redsoft-linux-gnu \
		-DLLVM_TARGETS_TO_BUILD="X86;AMDGPU" \
		-DLLVM_ENABLE_PROJECTS="" \
		-DLLVM_BUILD_LLVM_DYLIB=ON \
		-DLLVM_LINK_LLVM_DYLIB=ON \
		-DLLVM_BUILD_TOOLS=OFF \
		-DLLVM_BUILD_UTILS=OFF \
		-DLLVM_INCLUDE_TESTS=OFF \
		-DLLVM_INCLUDE_EXAMPLES=OFF \
		-DLLVM_INCLUDE_BENCHMARKS=OFF \
		-DLLVM_INCLUDE_DOCS=OFF \
		-DLLVM_ENABLE_DOXYGEN=OFF \
		-DLLVM_ENABLE_SPHINX=OFF \
		-DLLVM_ENABLE_BINDINGS=OFF \
		-DLLVM_ENABLE_TERMINFO=ON \
		-DLLVM_ENABLE_ZLIB=ON \
		-DLLVM_ENABLE_ZSTD=ON \
		-DLLVM_ENABLE_LIBXML2=ON \
		-DBUILD_SHARED_LIBS=OFF

	echo "==> Building LLVM (32-bit) - this may take 30-60 minutes..."
	cmake --build build -j$(nproc)
}

package() {
	cd "$srcdir/llvm-project-${_pkgver}.src/llvm"

	echo "==> Installing LLVM (32-bit) libraries..."
	DESTDIR="$pkgdir" cmake --install build

	# Remove executables and tools (to avoid conflicts with 64-bit LLVM)
	rm -rf "$pkgdir/usr/bin"
	rm -rf "$pkgdir/usr/share/man"
	rm -rf "$pkgdir/usr/share/opt-viewer"

	# Move libraries to /usr/lib (32-bit location)
	if [ -d "$pkgdir/usr/lib64" ]; then
		mkdir -p "$pkgdir/usr/lib"
		mv "$pkgdir/usr/lib64"/* "$pkgdir/usr/lib/" 2>/dev/null || true
		rmdir "$pkgdir/usr/lib64"
	fi

	# Keep only essential headers for Mesa compilation
	# Remove conflicting includes
	if [ -d "$pkgdir/usr/include" ]; then
		mkdir -p "$pkgdir/usr/include/llvm-32"
		mv "$pkgdir/usr/include/llvm" "$pkgdir/usr/include/llvm-32/" 2>/dev/null || true
		mv "$pkgdir/usr/include/llvm-c" "$pkgdir/usr/include/llvm-32/" 2>/dev/null || true
		# Remove other includes that conflict
		rm -rf "$pkgdir/usr/include"/*.h
	fi

	# Install license
	install -Dm644 LICENSE.TXT "$pkgdir/usr/share/licenses/$name/LICENSE.TXT"

	echo "==> LLVM ${version} (32-bit) libraries installed"
}

files() {
	# Find all installed files
	find "$pkgdir" -type f -o -type l | sed "s|^$pkgdir||" | sort
}