mirror of
https://github.com/SerenityOS/serenity
synced 2024-10-15 20:33:10 +00:00
fa1eef8bbe
Apart from bumping the toolchain Clang's and port's version, this commit completely overhauls the way LLVM toolchain is built. First, it gets rid of a complicated two-stage process of first compiling clang and compiler-rt builtins and then building libunwind, libc++abi, and libc++ -- it is possible to create a complete cross-compilation toolchain in a single CMake invocation with a modern LLVM. Moreover, the old method was inherently unsupported and subtly broken. Next, it utilizes full potential of the Stubs "framework". Now we are even able to compile Clang with -Wl,-z,defs which makes one of the patches obsolete and the whole installation less error-prone. Note that it comes at a cost of complicating the bootstrap process on a completely novel architecture but this hopefully won't happen often. Lastly, it fixes handling of the -no*lib* family of flags in the Serenity LLVM driver and correctly uses -nostartfiles in conjunction with stubs to make necessary CMake configure-time checks succeed.
67 lines
2.1 KiB
Bash
Executable file
67 lines
2.1 KiB
Bash
Executable file
#!/usr/bin/env -S bash ../.port_include.sh
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port='llvm'
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useconfigure='true'
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version='18.1.3'
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workdir="llvm-project-${version}.src"
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configopts=(
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"-DCMAKE_TOOLCHAIN_FILE=${SERENITY_BUILD_DIR}/CMakeToolchain.txt"
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)
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files=(
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"https://github.com/llvm/llvm-project/releases/download/llvmorg-${version}/llvm-project-${version}.src.tar.xz#2929f62d69dec0379e529eb632c40e15191e36f3bd58c2cb2df0413a0dc48651"
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)
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depends=(
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"ncurses"
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"zlib"
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"zstd"
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)
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configure() {
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# The cross compilers will be picked up from the CMake toolchain file.
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# CC/CXX must point to the host compiler to let it build host tools (tblgen).
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host_env
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if [ "$SERENITY_TOOLCHAIN" = "Clang" ]; then
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stdlib=""
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unwindlib=""
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exclude_atomic_builtin="OFF"
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else
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stdlib="libstdc++"
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unwindlib="libgcc"
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# Atomic builtins can't be cross-compiled with GCC. Use the libatomic port
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# if the program you're building has references to symbols like __atomic_load.
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exclude_atomic_builtin="ON"
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fi
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mkdir -p llvm-build
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cmake ${workdir}/llvm \
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-G Ninja \
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-B llvm-build "${configopts[@]}" \
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-DCLANG_DEFAULT_CXX_STDLIB=$stdlib \
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-DCLANG_DEFAULT_UNWINDLIB=$unwindlib \
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-DCMAKE_BUILD_TYPE=MinSizeRel \
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-DCMAKE_FIND_ROOT_PATH="$SERENITY_BUILD_DIR"/Root \
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-DCOMPILER_RT_BUILD_CRT=ON \
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-DCOMPILER_RT_BUILD_ORC=OFF \
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-DCOMPILER_RT_EXCLUDE_ATOMIC_BUILTIN=$exclude_atomic_builtin \
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-DCOMPILER_RT_OS_DIR=serenity \
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-DCROSS_TOOLCHAIN_FLAGS_NATIVE="-DCMAKE_C_COMPILER=$CC;-DCMAKE_CXX_COMPILER=$CXX" \
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-DHAVE_LIBRT=OFF \
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-DLLVM_DEFAULT_TARGET_TRIPLE=$SERENITY_ARCH-pc-serenity \
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-DLLVM_ENABLE_PROJECTS="clang;lld;compiler-rt" \
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-DLLVM_HAVE_LIBXAR=OFF \
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-DLLVM_INCLUDE_BENCHMARKS=OFF \
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-DLLVM_INCLUDE_TESTS=OFF \
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-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON \
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-DLLVM_OCAML_INSTALL_PATH="${SERENITY_INSTALL_ROOT}/usr/local/ocaml" \
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-DLLVM_PTHREAD_LIB=pthread \
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-DLLVM_TARGETS_TO_BUILD="X86;AArch64;RISCV"
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}
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build() {
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ninja -j${MAKEJOBS} -C llvm-build
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}
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install() {
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ninja -C llvm-build install
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}
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