name='lib32-llvm18'
version='18.1.8'
release='10'
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=()

deps_redos=()

# Build dependencies
build_deps=(
	'cmake'
	'ninja-build'
	'gcc'
	'gcc-c++'
	'python3'
	'python3-devel'
	'zlib-devel(x86-32)'
	'libzstd-devel(x86-32)'
	'libxml2-devel(x86-32)'
	'ncurses-devel(x86-32)'
	'libedit-devel(x86-32)'
	'libffi-devel(x86-32)'
	'glibc-devel(x86-32)'
)

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

# Provides 32-bit LLVM libraries and replaces system LLVM 17
provides=(
	'lib32-llvm18'
	'llvm18-libs(x86-32)'
	'llvm18-devel(x86-32)'
	'llvm-libs(x86-32)'
)

conflicts=(
	'llvm18-libs(x86-32) < 18.1.8'
	'llvm-libs(x86-32)'
)

_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_INSTALL_LIBDIR=lib \
		-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=ON \
		-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

	# Manually install llvm-config as llvm-config-18-32
	mkdir -p "$pkgdir/usr/bin"
	if [ -f "build/bin/llvm-config" ]; then
		install -m755 build/bin/llvm-config "$pkgdir/usr/bin/llvm-config-18-32"
	else
		echo "ERROR: llvm-config not found in build/bin/"
		exit 1
	fi

	# Remove all other binaries that might have been installed
	find "$pkgdir/usr/bin" -type f ! -name "llvm-config-18-32" -delete 2>/dev/null || true

	# Remove man pages and documentation
	rm -rf "$pkgdir/usr/share/man"
	rm -rf "$pkgdir/usr/share/opt-viewer"
	rm -rf "$pkgdir/usr/share/doc"

	# Libraries should already be in /usr/lib due to CMAKE_INSTALL_LIBDIR=lib
	# But check if any ended up in lib64 and move them
	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

	# Remove static libraries to save space and avoid conflicts
	echo "==> Removing static libraries..."
	find "$pkgdir/usr/lib" -name "*.a" -delete

	# Remove cmake files that might conflict
	rm -rf "$pkgdir/usr/lib/cmake"

	# Remove includes to avoid conflicts - Mesa will use system headers
	rm -rf "$pkgdir/usr/include"

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

	echo "==> LLVM ${version} (32-bit) installed: libraries in /usr/lib, llvm-config-18-32 in /usr/bin"
}

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