vasilito
ce8359342c
Per operator: don't forget Intel + virgl, and prepare for future NVIDIA. Intel (iris/anvil) and virgl need NO LLVM GPU backend (NIR / virtualized) — they stay in Mesa's driver lists as first-class targets. AMD needs AMDGPU (now); NVIDIA (future, nouveau/NVK) needs NVPTX. LLVM rebuilds are very expensive, so include NVPTX now (llvm21: X86;AMDGPU;NVPTX) to avoid an LLVM rebuild when NVIDIA lands. Documented the vendor->driver->LLVM-backend matrix in the amd64-only policy.
163 lines
6.3 KiB
TOML
163 lines
6.3 KiB
TOML
[package]
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name = "llvm21"
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version = "0.1.0"
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[source]
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git = "https://gitlab.redox-os.org/redox-os/llvm-project.git"
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upstream = "https://github.com/rust-lang/llvm-project.git"
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branch = "redox-2025-10-03"
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shallow_clone = true
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[build]
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template = "custom"
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dependencies = [
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"zstd",
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]
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script = """
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DYNAMIC_INIT
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ARCH="$(echo "${TARGET}" | cut -d - -f1)"
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# Save and unset cross-compile flags inherited from DYNAMIC_INIT so
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# the host cc in the native TableGen build links against the host libc
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# instead of the Redox sysroot libc (which would fail with "undefined
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# reference to __libc_start_main"). These env vars are also cleared
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# inside native.cmake for the sub-process, but the parent shell
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# still needs them unset before generating native.cmake so that the
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# generated file does not embed the cross sysroot paths. The cross
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# build (cookbook_cmake below) restores them from the saved values.
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_SAVED_LDFLAGS="${LDFLAGS:-}"
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_SAVED_CFLAGS="${CFLAGS:-}"
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_SAVED_CXXFLAGS="${CXXFLAGS:-}"
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unset LDFLAGS CFLAGS CXXFLAGS
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# Use /usr (host sysroot) for the native build, NOT $COOKBOOK_TOOLCHAIN
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# (which points to the Redox cross sysroot). The Redox sysroot's libc.a
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# (relibc) lacks __libc_start_main, causing the native cmake try_compile
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# to fail with "undefined reference to __libc_start_main".
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generate_cookbook_cmake_file "$COOKBOOK_HOST_TARGET" "" "/usr" native.cmake
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# The generated native.cmake inherits CMAKE_C_FLAGS / CMAKE_LDFLAGS / etc.
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# from the cross toolchain, which causes the host cc to link the native
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# TableGen build against the Redox sysroot libc and fail with
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# "undefined reference to __libc_start_main". CACHE FORCE is required
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# because CMake's try_compile creates a sub-cache that re-reads the
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# parent values unless they are explicitly forced in the cache.
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cat >> native.cmake <<'NATIVE_EOF'
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# Override cross-sysroot flags so the host cc links against the host libc.
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# Also clear the LDFLAGS env var that DYNAMIC_INIT exports, because cc
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# picks up -L<sysroot>/lib from it and links against the Redox libc,
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# which then fails with "undefined reference to __libc_start_main".
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set(CMAKE_C_FLAGS "" CACHE STRING "" FORCE)
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set(CMAKE_CXX_FLAGS "" CACHE STRING "" FORCE)
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set(CMAKE_CXX_FLAGS_DEBUG "" CACHE STRING "" FORCE)
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set(CMAKE_CXX_FLAGS_RELEASE "" CACHE STRING "" FORCE)
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set(CMAKE_C_FLAGS_DEBUG "" CACHE STRING "" FORCE)
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set(CMAKE_C_FLAGS_RELEASE "" CACHE STRING "" FORCE)
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set(CMAKE_LDFLAGS "" CACHE STRING "" FORCE)
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set(CMAKE_LDFLAGS_DEBUG "" CACHE STRING "" FORCE)
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set(CMAKE_LDFLAGS_RELEASE "" CACHE STRING "" FORCE)
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set(CMAKE_EXE_LINKER_FLAGS "" CACHE STRING "" FORCE)
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set(CMAKE_SHARED_LINKER_FLAGS "" CACHE STRING "" FORCE)
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set(CMAKE_C_IMPLICIT_LINK_DIRECTORIES "" CACHE STRING "" FORCE)
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set(CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES "" CACHE STRING "" FORCE)
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set(CMAKE_SYSROOT "" CACHE STRING "" FORCE)
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set(CMAKE_FIND_ROOT_PATH "" CACHE STRING "" FORCE)
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set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM "NEVER" CACHE STRING "" FORCE)
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set(ENV{LDFLAGS} "")
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set(ENV{CFLAGS} "")
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set(ENV{CXXFLAGS} "")
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NATIVE_EOF
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# amd64-only (see local/AGENTS.md): the CPU target is X86 (= amd64/x86_64).
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# GPU codegen backends are a separate axis from the CPU platform and are driven
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# by which Mesa drivers we ship:
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# - AMDGPU -> radeonsi (GL) + radv (Vulkan), AMD hardware GPUs. Required now:
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# Mesa's `dependency('llvm', modules: [... amdgpu ...])` fails without it.
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# - NVPTX -> future NVIDIA support (nouveau/NVK). Included NOW so enabling
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# NVIDIA later needs no (very expensive) LLVM rebuild.
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# - Intel (iris/anvil) and virgl need NO LLVM GPU backend — Intel is NIR-based
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# with its own shader compiler and virgl is virtualized; they are enabled via
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# Mesa's gallium/vulkan driver lists, not an LLVM target.
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# None of these add a second CPU platform, so amd64-only still holds.
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case "${ARCH}" in
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x86 | x86_64) LLVM_TARGETS_TO_BUILD="X86;AMDGPU;NVPTX";;
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aarch64) LLVM_TARGETS_TO_BUILD="AArch64;AMDGPU;NVPTX";;
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riscv64gc) LLVM_TARGETS_TO_BUILD="RISCV;AMDGPU;NVPTX";;
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esac
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if [ "${COOKBOOK_HOST_SYSROOT}" = "/usr" ]; then
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LLVM_TARGETS_TO_BUILD="X86;AMDGPU;NVPTX"
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fi
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# This just build the LLVM library and tools just enough for Rust, to build the rest of LLVM see
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# https://github.com/llvm/llvm-zorg/blob/main/zorg/buildbot/builders/annotated/standalone-build.sh
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COOKBOOK_CMAKE_FLAGS+=(
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-DLLVM_BUILD_LLVM_DYLIB=On
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-DLLVM_LINK_LLVM_DYLIB=On
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-DLLVM_INCLUDE_UTILS=On
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-DLLVM_INSTALL_UTILS=On
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-DLLVM_TOOL_LLVM_COV_BUILD=On
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-DLLVM_TOOL_LLVM_PROFDATA_BUILD=On
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-DLLVM_TARGETS_TO_BUILD="$LLVM_TARGETS_TO_BUILD"
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-DLLVM_ENABLE_ZLIB=Off
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-DLLVM_USE_STATIC_ZSTD=On
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-DLLVM_ENABLE_LIBXML2=Off
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# the rest of options that shared to clang
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-DCROSS_TOOLCHAIN_FLAGS_NATIVE="-DCMAKE_TOOLCHAIN_FILE=$(realpath "${COOKBOOK_RECIPE}/native.cmake")"
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-DCMAKE_CXX_FLAGS="--std=gnu++11"
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-DBUILD_SHARED_LIBS=False
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-DLLVM_BUILD_EXAMPLES=Off
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-DLLVM_BUILD_TESTS=Off
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-DLLVM_DEFAULT_TARGET_TRIPLE="${TARGET}"
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-DLLVM_ENABLE_LTO=Off
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-DLLVM_ENABLE_RTTI=On
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-DLLVM_ENABLE_THREADS=On
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-DLLVM_INCLUDE_EXAMPLES=Off
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-DLLVM_INCLUDE_TESTS=Off
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-DLLVM_OPTIMIZED_TABLEGEN=On
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-DLLVM_TARGET_ARCH=$ARCH
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-DLLVM_TOOLS_INSTALL_DIR=bin
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-DLLVM_UTILS_INSTALL_DIR=bin
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-DUNIX=1
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)
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COOKBOOK_SOURCE="$COOKBOOK_SOURCE/llvm"
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# Pass cross-compile linker flags via cmake variables instead of the
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# LDFLAGS env var. LDFLAGS in the environment leaks into the native
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# TableGen build's cmake try_compile, causing it to link against the
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# Redox relibc (which lacks __libc_start_main) instead of host glibc.
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# By keeping LDFLAGS unset and passing flags through cmake, the native
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# build inherits a clean environment.
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if [ -n "${_SAVED_LDFLAGS}" ]; then
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COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_EXE_LINKER_FLAGS="${_SAVED_LDFLAGS}")
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COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_SHARED_LINKER_FLAGS="${_SAVED_LDFLAGS}")
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fi
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if [ -n "${_SAVED_CFLAGS}" ]; then
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COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_C_FLAGS="${_SAVED_CFLAGS}")
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fi
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if [ -n "${_SAVED_CXXFLAGS}" ]; then
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COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_CXX_FLAGS="--std=gnu++11 ${_SAVED_CXXFLAGS}")
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else
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COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_CXX_FLAGS="--std=gnu++11")
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fi
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cookbook_cmake
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"""
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# llvm runtime
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[[optional-packages]]
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name = "runtime"
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files = [
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"usr/bin/**",
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]
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[[optional-packages]]
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name = "dev"
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dependencies = [ ".runtime" ]
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files = [
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"usr/include/llvm*/**",
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"usr/lib/libLLVM*.a",
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"usr/lib/cmake/llvm/**",
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]
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