version = "21.1.6"
revision = 1
description = "LLVM compiler infrastructure (target libLLVM for Mesa)"
license = "Apache-2.0 WITH LLVM-exception"
url = "https://llvm.org/"
source = tarball(
    url=f"https://github.com/llvm/llvm-project/releases/download/llvmorg-{version}/llvm-project-{version}.src.tar.xz",
    sha256="ae67086eb04bed7ca11ab880349b5f1ab6f50e1b88cda376eaf8a845b935762b",
)
host_deps = ["binutils", "gcc", "pkgconf"]
# Pinned independently of the host LLVM (22.x): this must be a release that
# Mesa 25.3 accepts. Provides target libLLVM for the llvmpipe/radeonsi gallium
# drivers; X86 + AMDGPU backends cover software rendering and AMD GPUs.
deps = [profile["libc"], "ncurses", "zlib", "zstd", "libffi", "libxml2"]


def configure(self):
    p = self.options
    self.run(
        "cmake",
        "-S",
        self.source_dir / "llvm",
        "-B",
        self.build_dir,
        "-GNinja",
        "-DCMAKE_BUILD_TYPE=Release",
        f"-DCMAKE_INSTALL_PREFIX={p.get('prefix', '/usr')}",
        # Cross toolchain. CMAKE_CROSSCOMPILING triggers LLVM to build a native
        # llvm-tblgen under build/NATIVE with the default host compiler.
        "-DCMAKE_SYSTEM_NAME=Linux",
        f"-DCMAKE_SYSTEM_PROCESSOR={self.arch}",
        f"-DCMAKE_SYSROOT={self.sysroot}",
        f"-DCMAKE_C_COMPILER={self.triple}-gcc",
        f"-DCMAKE_CXX_COMPILER={self.triple}-g++",
        "-DCMAKE_FIND_ROOT_PATH_MODE_PROGRAM=NEVER",
        "-DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=ONLY",
        "-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY",
        "-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ONLY",
        f"-DLLVM_HOST_TRIPLE={self.triple}",
        f"-DLLVM_DEFAULT_TARGET_TRIPLE={self.triple}",
        "-DLLVM_TARGETS_TO_BUILD=X86;AMDGPU",
        "-DLLVM_BUILD_LLVM_DYLIB=ON",
        "-DLLVM_LINK_LLVM_DYLIB=ON",
        "-DLLVM_ENABLE_RTTI=ON",
        "-DLLVM_ENABLE_FFI=ON",
        "-DLLVM_ENABLE_ZLIB=FORCE_ON",
        "-DLLVM_ENABLE_ZSTD=FORCE_ON",
        "-DLLVM_ENABLE_LIBXML2=FORCE_ON",
        "-DLLVM_ENABLE_TERMINFO=ON",
        "-DLLVM_INCLUDE_TESTS=OFF",
        "-DLLVM_INCLUDE_EXAMPLES=OFF",
        "-DLLVM_INCLUDE_BENCHMARKS=OFF",
        "-DLLVM_INCLUDE_DOCS=OFF",
        "-DLLVM_ENABLE_PROJECTS=",
        "-Wno-dev",
        env={
            "CFLAGS": p.get("cflags", ""),
            "CXXFLAGS": p.get("cxxflags", ""),
            "LDFLAGS": p.get("ldflags", ""),
        },
    )


def build(self):
    self.run("cmake", "--build", self.build_dir, f"-j{self.jobs}")


def install(self):
    self.run("cmake", "--install", self.build_dir, env={"DESTDIR": str(self.dest_dir)})
    # Runtime needs the shared libLLVM + headers/llvm-config; static archives are
    # large and unnecessary for Mesa.
    self.run("sh", "-c", f"rm -f {self.dest_dir}/usr/lib/*.a")