[source]
git = "https://gitlab.redox-os.org/redox-os/llvm-project.git"
upstream = "https://github.com/rust-lang/llvm-project.git"
branch = "redox-2025-10-03"
shallow_clone = true

[build]
template = "custom"
dependencies = [
    "zstd",
]
script = """
DYNAMIC_INIT
ARCH="$(echo "${TARGET}" | cut -d - -f1)"

# Save and unset cross-compile flags inherited from DYNAMIC_INIT so
# the host cc in the native TableGen build links against the host libc
# instead of the Redox sysroot libc (which would fail with "undefined
# reference to __libc_start_main"). These env vars are also cleared
# inside native.cmake for the sub-process, but the parent shell
# still needs them unset before generating native.cmake so that the
# generated file does not embed the cross sysroot paths. The cross
# build (cookbook_cmake below) restores them from the saved values.
_SAVED_LDFLAGS="${LDFLAGS:-}"
_SAVED_CFLAGS="${CFLAGS:-}"
_SAVED_CXXFLAGS="${CXXFLAGS:-}"
unset LDFLAGS CFLAGS CXXFLAGS
# Use /usr (host sysroot) for the native build, NOT $COOKBOOK_TOOLCHAIN
# (which points to the Redox cross sysroot).  The Redox sysroot's libc.a
# (relibc) lacks __libc_start_main, causing the native cmake try_compile
# to fail with "undefined reference to __libc_start_main".
generate_cookbook_cmake_file "$COOKBOOK_HOST_TARGET" "" "/usr" native.cmake

# The generated native.cmake inherits CMAKE_C_FLAGS / CMAKE_LDFLAGS / etc.
# from the cross toolchain, which causes the host cc to link the native
# TableGen build against the Redox sysroot libc and fail with
# "undefined reference to __libc_start_main". CACHE FORCE is required
# because CMake's try_compile creates a sub-cache that re-reads the
# parent values unless they are explicitly forced in the cache.
cat >> native.cmake <<'NATIVE_EOF'

# Override cross-sysroot flags so the host cc links against the host libc.
# Also clear the LDFLAGS env var that DYNAMIC_INIT exports, because cc
# picks up -L<sysroot>/lib from it and links against the Redox libc,
# which then fails with "undefined reference to __libc_start_main".
set(CMAKE_C_FLAGS "" CACHE STRING "" FORCE)
set(CMAKE_CXX_FLAGS "" CACHE STRING "" FORCE)
set(CMAKE_CXX_FLAGS_DEBUG "" CACHE STRING "" FORCE)
set(CMAKE_CXX_FLAGS_RELEASE "" CACHE STRING "" FORCE)
set(CMAKE_C_FLAGS_DEBUG "" CACHE STRING "" FORCE)
set(CMAKE_C_FLAGS_RELEASE "" CACHE STRING "" FORCE)
set(CMAKE_LDFLAGS "" CACHE STRING "" FORCE)
set(CMAKE_LDFLAGS_DEBUG "" CACHE STRING "" FORCE)
set(CMAKE_LDFLAGS_RELEASE "" CACHE STRING "" FORCE)
set(CMAKE_EXE_LINKER_FLAGS "" CACHE STRING "" FORCE)
set(CMAKE_SHARED_LINKER_FLAGS "" CACHE STRING "" FORCE)
set(CMAKE_C_IMPLICIT_LINK_DIRECTORIES "" CACHE STRING "" FORCE)
set(CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES "" CACHE STRING "" FORCE)
set(CMAKE_SYSROOT "" CACHE STRING "" FORCE)
set(CMAKE_FIND_ROOT_PATH "" CACHE STRING "" FORCE)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM "NEVER" CACHE STRING "" FORCE)
set(ENV{LDFLAGS} "")
set(ENV{CFLAGS} "")
set(ENV{CXXFLAGS} "")
NATIVE_EOF

case "${ARCH}" in
    x86 | x86_64) LLVM_TARGETS_TO_BUILD="X86";;
    aarch64) LLVM_TARGETS_TO_BUILD="AArch64";;
    riscv64gc) LLVM_TARGETS_TO_BUILD="RISCV";;
esac

if [ "${COOKBOOK_HOST_SYSROOT}" = "/usr" ]; then
    LLVM_TARGETS_TO_BUILD="X86;AArch64;RISCV"
fi

# This just build the LLVM library and tools just enough for Rust, to build the rest of LLVM see
# https://github.com/llvm/llvm-zorg/blob/main/zorg/buildbot/builders/annotated/standalone-build.sh

COOKBOOK_CMAKE_FLAGS+=(
    -DLLVM_BUILD_LLVM_DYLIB=On
    -DLLVM_LINK_LLVM_DYLIB=On
    -DLLVM_INCLUDE_UTILS=On
    -DLLVM_INSTALL_UTILS=On
    -DLLVM_TOOL_LLVM_COV_BUILD=On
    -DLLVM_TOOL_LLVM_PROFDATA_BUILD=On
    -DLLVM_TARGETS_TO_BUILD="$LLVM_TARGETS_TO_BUILD"
    -DLLVM_ENABLE_ZLIB=Off
    -DLLVM_USE_STATIC_ZSTD=On
    -DLLVM_ENABLE_LIBXML2=Off

# the rest of options that shared to clang
    -DCROSS_TOOLCHAIN_FLAGS_NATIVE="-DCMAKE_TOOLCHAIN_FILE=$(realpath "${COOKBOOK_RECIPE}/native.cmake")"
    -DCMAKE_CXX_FLAGS="--std=gnu++11"
    -DBUILD_SHARED_LIBS=False
    -DLLVM_BUILD_EXAMPLES=Off
    -DLLVM_BUILD_TESTS=Off
    -DLLVM_DEFAULT_TARGET_TRIPLE="${TARGET}"
    -DLLVM_ENABLE_LTO=Off
    -DLLVM_ENABLE_RTTI=On
    -DLLVM_ENABLE_THREADS=On
    -DLLVM_INCLUDE_EXAMPLES=Off
    -DLLVM_INCLUDE_TESTS=Off
    -DLLVM_OPTIMIZED_TABLEGEN=On
    -DLLVM_TARGET_ARCH=$ARCH
    -DLLVM_TOOLS_INSTALL_DIR=bin
    -DLLVM_UTILS_INSTALL_DIR=bin
    -DUNIX=1
)

COOKBOOK_SOURCE="$COOKBOOK_SOURCE/llvm"
# Pass cross-compile linker flags via cmake variables instead of the
# LDFLAGS env var.  LDFLAGS in the environment leaks into the native
# TableGen build's cmake try_compile, causing it to link against the
# Redox relibc (which lacks __libc_start_main) instead of host glibc.
# By keeping LDFLAGS unset and passing flags through cmake, the native
# build inherits a clean environment.
if [ -n "${_SAVED_LDFLAGS}" ]; then
    COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_EXE_LINKER_FLAGS="${_SAVED_LDFLAGS}")
    COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_SHARED_LINKER_FLAGS="${_SAVED_LDFLAGS}")
fi
if [ -n "${_SAVED_CFLAGS}" ]; then
    COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_C_FLAGS="${_SAVED_CFLAGS}")
fi
if [ -n "${_SAVED_CXXFLAGS}" ]; then
    COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_CXX_FLAGS="--std=gnu++11 ${_SAVED_CXXFLAGS}")
else
    COOKBOOK_CMAKE_FLAGS+=(-DCMAKE_CXX_FLAGS="--std=gnu++11")
fi
cookbook_cmake
"""

# llvm runtime
[[optional-packages]]
name = "runtime"
files = [
    "usr/bin/**",
]

[[optional-packages]]
name = "dev"
dependencies = [ ".runtime" ]
files = [
    "usr/include/llvm*/**",
    "usr/lib/libLLVM*.a",
    "usr/lib/cmake/llvm/**",
]