Ports: Add LLVM port

Ports/llvm/package.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env -S bash ../.port_include.sh
+port=llvm
+useconfigure=true
+version=12.0.0
+workdir=llvm-project-llvmorg-${version}
+configopts="-DCMAKE_TOOLCHAIN_FILE=$SERENITY_SOURCE_DIR/Toolchain/CMake/CMakeToolchain.txt"
+files="https://github.com/llvm/llvm-project/archive/refs/tags/llvmorg-${version}.zip llvm.zip f77723b70a5d4ab14899feda87d6cf601612165899abb2f6c7b670e517f45e2d"
+auth_type=sha256
+
+pre_patch() {
+    host_env
+    mkdir -p llvm-host
+    cmake ${workdir}/llvm \
+    -B llvm-host \
+    -DLLVM_ENABLE_PROJECTS=clang
+    make -C llvm-host -j $(nproc) llvm-tblgen clang-tblgen
+    target_env
+}
+
+configure() {
+    mkdir -p llvm-build
+    cmake ${workdir}/llvm \
+    -B llvm-build $configopts \
+    -DCMAKE_BUILD_TYPE=MinSizeRel \
+    -DLLVM_TARGETS_TO_BUILD=X86 \
+    -DLLVM_ENABLE_PROJECTS="clang;lld;compiler-rt" \
+    -DLLVM_TABLEGEN=$(pwd)/llvm-host/bin/llvm-tblgen \
+    -DCMAKE_CROSSCOMPILING=True \
+    -DLLVM_DEFAULT_TARGET_TRIPLE=i386-none-gnueabi \
+    -DLLVM_TARGET_ARCH=X86 \
+    -DLLVM_INCLUDE_BENCHMARKS=OFF \
+    -DLLVM_INCLUDE_TESTS=OFF \
+    -DCLANG_TABLEGEN=$(pwd)/llvm-host/bin/clang-tblgen
+}
+
+build() {
+    make -C llvm-build -j $(nproc) --no-print-directory
+}
+
+install() {
+    make -C llvm-build -j $(nproc) --no-print-directory install
+}