1 files changed, 51 insertions, 0 deletions
diff --git a/tools/build-static-lld.sh b/tools/build-static-lld.sh
new file mode 100644
index 0000000..407e814
--- /dev/null
+++ b/tools/build-static-lld.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+# Build LLD against an installed LLVM SDK; install it in cpsc's build prefix.
+set -eu
+
+if [ "$#" -lt 2 ] || [ "$#" -gt 3 ]; then
+    echo "Usage: sh tools/build-static-lld.sh LLVM_PREFIX BUILD_DIRECTORY [JOBS]" >&2
+    exit 1
+fi
+
+llvm_prefix=$(cd "$1" && pwd)
+mkdir -p "$2"
+build_root=$(cd "$2" && pwd)
+jobs=${3:-3}
+llvm_version=$("$llvm_prefix/bin/llvm-config" --version)
+case "$llvm_version" in
+    23.*) ;;
+    *) echo "Static LLD requires LLVM 23; found $llvm_version" >&2; exit 1 ;;
+esac
+
+work="$build_root/static-lld-$llvm_version"
+archive="$work/llvm-project-$llvm_version.src.tar.xz"
+mkdir -p "$work/src/llvm"
+if [ ! -f "$archive" ]; then
+    curl -fL --retry 3 \
+        "https://github.com/llvm/llvm-project/releases/download/llvmorg-$llvm_version/llvm-project-$llvm_version.src.tar.xz" \
+        -o "$archive.part"
+    mv "$archive.part" "$archive"
+fi
+if [ ! -f "$work/src/.extracted" ]; then
+    tar -xJf "$archive" -C "$work/src" --strip-components=1 \
+        "llvm-project-$llvm_version.src/lld" "llvm-project-$llvm_version.src/cmake" \
+        "llvm-project-$llvm_version.src/libunwind/include"
+    touch "$work/src/.extracted"
+fi
+
+set --
+if [ "$(uname -s)" = Darwin ]; then
+    set -- "-DCMAKE_OSX_ARCHITECTURES=$(uname -m)" \
+        "-DCMAKE_OSX_DEPLOYMENT_TARGET=${MACOSX_DEPLOYMENT_TARGET:-15.0}"
+fi
+cmake -S "$work/src/lld" -B "$work/build" \
+    -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=OFF \
+    -DLLVM_INCLUDE_TESTS=OFF -DLLVM_LINK_LLVM_DYLIB=ON \
+    "-DLLVM_DIR=$llvm_prefix/lib/cmake/llvm" \
+    "-DLLVM_MAIN_SRC_DIR=$work/src/llvm" \
+    "-DCMAKE_C_COMPILER=$llvm_prefix/bin/clang" \
+    "-DCMAKE_CXX_COMPILER=$llvm_prefix/bin/clang++" \
+    "-DCMAKE_INSTALL_RPATH=$llvm_prefix/lib" \
+    "-DCMAKE_INSTALL_PREFIX=$build_root" -DCMAKE_INSTALL_LIBDIR=lib "$@"
+cmake --build "$work/build" --parallel "$jobs"
+cmake --install "$work/build"