Add windows arm64 crossbuild support

.github/release-drafter.yml

@@ -66,6 +66,7 @@ template: |
   - `docker.elastic.co/beats-dev/golang-crossbuild:$RESOLVED_VERSION-mips-debian12(-fips)?`   - linux/mips64, linux/mips64el
   - `docker.elastic.co/beats-dev/golang-crossbuild:$RESOLVED_VERSION-ppc-debian12(-fips)?`    - linux/ppc64, linux/ppc64le
   - `docker.elastic.co/beats-dev/golang-crossbuild:$RESOLVED_VERSION-s390x-debian12(-fips)?`  - linux/s390x
+  - `docker.elastic.co/beats-dev/golang-crossbuild:$RESOLVED_VERSION-windows-arm64-debian12(-fips)?`   - linux/arm64, windows/arm64
 
   ### Changes
 

go/Makefile.debian12

@@ -1,5 +1,5 @@
 IMAGES         := base main darwin armhf armel mips ppc s390x npcap
-ARM_IMAGES     := base-arm darwin-arm64
+ARM_IMAGES     := base-arm darwin-arm64 windows-arm64
 DEBIAN_VERSION := 12
 TAG_EXTENSION  := -debian12
 

go/windows-arm64/Dockerfile.tmpl

@@ -0,0 +1,74 @@
+ARG REPOSITORY
+ARG VERSION
+ARG TAG_EXTENSION=''
+
+FROM ${REPOSITORY}/golang-crossbuild:${VERSION}-base-arm${TAG_EXTENSION}
+
+#ARG LLVM_MINGW64_VER=20250826
+ARG LLVM_MINGW64_VER=20250910
+ARG LLVM_MINGW_UBUNTU_REL='22.04'
+ARG LLVM_MINGW64_SRC="https://github.com/mstorsjo/llvm-mingw/releases/download"
+ENV LLVM_MINGW64_VER="${LLVM_MINGW64_VER}"
+ENV LLVM_MINGW64_SRC="$LLVM_MINGW64_SRC"
+
+{{- if ne .DEBIAN_VERSION "12"}}
+RUN echo "This Docker image will work only with Debian >12" && exit 1
+{{- end }}
+
+RUN \
+    apt-get -o Acquire::Check-Valid-Until=false update \
+    && apt-get install -qq -y --no-install-recommends --allow-unauthenticated \
+        cmake \
+        patch \
+        libssl-dev \
+        libxml2-dev \
+        lzma-dev \
+        uuid-dev \
+        make \
+        bash \
+        wget \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /tmp
+COPY --chmod=0755 scripts/setup-llvm-mingw64.sh /tmp/
+RUN /tmp/setup-llvm-mingw64.sh
+
+COPY --chmod=0755 scripts/install-llvm-mingw64.sh /tmp/install-llvm-mingw64.sh
+RUN /tmp/install-llvm-mingw64.sh /tmp/llvm-mingw64 && rm -rf /tmp/*
+
+COPY rootfs /
+
+# Basic test
+RUN which aarch64-w64-mingw32-gcc
+
+RUN cd / \
+  && aarch64-w64-mingw32-gcc helloWorld.c -o helloWorld.arm64 \
+  && file helloWorld.arm64 \
+  && file helloWorld.arm64 | grep -c 'PE32+ executable (console) Aarch64, for MS Windows'
+
+RUN cd / \
+  && aarch64-w64-mingw32uwp-gcc helloWorld.c -o helloWorld.arm64e \
+  && file helloWorld.arm64e \
+  && file helloWorld.arm64e | grep -c 'PE32+ executable (console) Aarch64, for MS Windows'
+
+ENV CGO_ENABLED 1
+#ENV CC aarch64-w64-mingw32-gcc
+#ENV CXX aarch64-w64-mingw32-g++
+ENV CGO_FLAGS="$CGO_FLAGS -I/usr/generic-w64-mingw32/include"
+ENV CGO_CFLAGS="-fno-addrsig"
+RUN go env
+
+RUN aarch64-w64-mingw32-gcc --version
+
+RUN go clean -cache -modcache -i -r
+
+# Build-time metadata as defined at http://label-schema.org.
+ARG BUILD_DATE
+ARG IMAGE
+ARG VCS_REF
+ARG VCS_URL
+LABEL org.label-schema.build-date=$BUILD_DATE \
+      org.label-schema.name=$IMAGE \
+      org.label-schema.vcs-ref=$VCS_REF \
+      org.label-schema.vcs-url=$VCS_URL \
+      org.label-schema.schema-version="1.0"

go/windows-arm64/Makefile

@@ -0,0 +1,10 @@
+include ../Makefile.common
+
+ifeq ($(DOCKER_MULTIARCH),1)
+DOCKER_CMD := $(SELF_DIR)/../.buildkite/scripts/buildx.sh
+
+push:
+	@echo "Already done by buildx (.buildkite/scripts/buildx.sh)."
+atomic-push:
+	@echo "Already done by buildx (.buildkite/scripts/buildx.sh)."
+endif

go/windows-arm64/rootfs/compilers.yaml

@@ -0,0 +1,7 @@
+---
+
+windows:
+  arm64:
+    CC:  aarch64-w64-mingw32-gcc
+    CXX: aarch64-w64-mingw32-g++
+

go/windows-arm64/rootfs/helloWorld.c

@@ -0,0 +1,5 @@
+#include <stdio.h>
+int main() {
+   printf("Hello, World!");
+   return 0;
+}

go/windows-arm64/scripts/install-llvm-mingw64.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+#
+# Copied from: https://github.com/x1unix/docker-go-mingw/tree/20dfaff6efe8fe3a4ff588a58ccb31646cd2fd60
+#
+set -e
+set -o pipefail
+
+trap 'echo "$0: Error on line $LINENO" >&2' ERR
+
+src="$1"
+if [ -z "$src" ]; then
+    echo "Error: missing source dir"
+    exit 1
+fi
+
+base_dir='/usr'
+
+echo ":: Installing llvm-mingw64..."
+echo "Source dir: $src"
+
+cd "$src" || exit 1
+find . -mindepth 1 -maxdepth 1 -type d ! -name . | while read -r subdir; do
+    dst_dir="$(basename "$subdir")"
+
+    case "$dst_dir" in
+    bin)
+        perm=755
+        ;;
+    *)
+        perm=644
+        ;;
+    esac
+
+    find "$subdir" -type f | while read -r file; do
+        dst="$base_dir/${file/.\//}"
+        mkdir -p "$(dirname "$dst")"
+        install -m $perm "$file" "$dst"
+    done
+done
+
+echo ":: Restoring symlinks..."
+while IFS= read -r line; do
+    src=$(echo "$line" | awk '{print $1}')
+    src="$base_dir/$src"
+
+    dest=$(echo "$line" | awk '{print $2}')
+    dest="$(realpath "$base_dir/$dest")"
+    ln -s "$dest" "$src"
+done <symlinks.txt
+
+echo ":: Cleanup"
+cd ..
+rm -rf "$src"

go/windows-arm64/scripts/setup-llvm-mingw64.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+#
+# Copied from: https://github.com/x1unix/docker-go-mingw/tree/20dfaff6efe8fe3a4ff588a58ccb31646cd2fd60
+#
+set -e
+set -o pipefail
+
+trap 'echo "$0: Error on line $LINENO" >&2' ERR
+
+if [ -z "$LLVM_MINGW64_SRC" ]; then
+    echo "Error: LLVM_MINGW64_SRC is undefined"
+    env
+    exit 1
+fi
+
+if [ -z "$LLVM_MINGW_UBUNTU_REL" ]; then
+    echo "Error: LLVM_MINGW_UBUNTU_REL is undefined"
+    env
+    exit 1
+fi
+
+if [ -z "$LLVM_MINGW64_VER" ]; then
+    echo "Error: LLVM_MINGW64_VER is undefined"
+    env
+    exit 1
+fi
+
+apt update && apt install xz-utils --yes
+
+case "$(uname -m)" in
+aarch64 | arm64)
+    m_arch="aarch64"
+    ;;
+x86_64 | amd64)
+    m_arch="x86_64"
+    ;;
+*)
+    echo "Error: unsupported architecture $(uname -m)"
+    exit 1
+    ;;
+esac
+
+pkg_dir="llvm-mingw-$LLVM_MINGW64_VER-ucrt-ubuntu-$LLVM_MINGW_UBUNTU_REL-$m_arch"
+pkg_file="$pkg_dir.tar.xz"
+src_url="$LLVM_MINGW64_SRC/$LLVM_MINGW64_VER/$pkg_file"
+echo ":: Downloading $src_url ..."
+wget "$src_url"
+# wget -q --spider "$src_url"
+
+if [ ! -f "$pkg_file" ]; then
+    echo "Error: can't find downloaded file $pkg_file"
+    ls -la
+    exit 1
+fi
+
+echo ":: Extracting file..."
+tar -xf "$pkg_file"
+rm "$pkg_file"
+
+echo ":: Preparing file list..."
+mv "$pkg_dir" llvm-mingw64
+cd llvm-mingw64
+
+# Keep llvm-mingw64 only for arm target to avoid conflict with gcc-mingw64
+rm bin/x86_64* bin/i686*
+rm -rf i686-w64-mingw32 x86_64-w64-mingw32
+
+# Backup symlinks
+find . -type l | while read -r symlink; do
+    src="${symlink/.\//}"
+    dst="$(dirname "$src")/$(readlink "$symlink")"
+    echo "$src $dst" >>symlinks.txt
+    rm "$symlink"
+done