Cross-compile BusyBox

Signed-off-by: Marcel Bargull <[email protected]>
bioconda · Oct 17, 2023 · 8bf149c · 8bf149c
1 parent c32537b
commit 8bf149c
Show file tree

Hide file tree

Showing 4 changed files with 47 additions and 26 deletions.
diff --git a/.github/workflows/base-glibc-busybox-bash.yaml b/.github/workflows/base-glibc-busybox-bash.yaml
@@ -53,12 +53,20 @@ jobs:
           buildah manifest create "${image_name}:${tag}"
         done
 
+        iidfile="$( mktemp )"
+        buildah bud \
+          --iidfile="${iidfile}" \
+          --build-arg=busybox_version='${{ env.BUSYBOX_VERSION }}' \
+          --file=Dockerfile.busybox
+        busybox_image="$( cat "${iidfile}" )"
+        rm "${iidfile}"
+
         for arch in amd64 arm64 ; do
           iidfile="$( mktemp )"
           buildah bud --layers \
             --arch="${arch}" \
             --iidfile="${iidfile}" \
-            --build-arg=busybox_version='${{ env.BUSYBOX_VERSION }}' \
+            --build-arg=busybox_image="${busybox_image}" \
             --build-arg=debian_version='${{ env.DEBIAN_VERSION }}'
           image_id="$( cat "${iidfile}" )"
           rm "${iidfile}"

diff --git a/images/base-glibc-busybox-bash/Dockerfile b/images/base-glibc-busybox-bash/Dockerfile
@@ -10,28 +10,16 @@ RUN [ ! -f /etc/apt/sources.list ] || sed --in-place= --regexp-extended \
       /etc/apt/sources.list
 
 
-# Build busybox ourselves to have more fine-grained control over what we want
-# (or not want) to include.
-# Use old Debian version to ensure compatible (low glibc requirement) binaries.
-FROM debian:9-slim AS busybox_builder
-RUN [ ! -f /etc/apt/sources.list ] || sed --in-place= --regexp-extended \
-      '/ stretch/ { s,-updates,-backports, ; s,/(deb|security)\.,/archive., }' \
-      /etc/apt/sources.list \
-    && \
-    apt-get update && \
-    DEBIAN_FRONTEND=noninteractive \
-      apt-get install --yes --no-install-recommends \
-      bzip2 curl ca-certificates tar gcc libc6-dev make patch
-
-WORKDIR /build
-COPY build-busybox ./
-ARG busybox_version
-RUN ./build-busybox "${busybox_version}"
+FROM build_base AS rootfs_builder
 
+ARG busybox_image
+COPY --from="${busybox_image}" /build /build
 WORKDIR /busybox-rootfs
-RUN mkdir -p ./bin ./sbin ./usr/bin ./usr/sbin \
+RUN arch="$( uname -m )" \
+    && \
+    mkdir -p ./bin ./sbin ./usr/bin ./usr/sbin \
     && \
-    cp -al /build/busybox ./bin/ \
+    cp -al "/build/busybox.${arch}" ./bin/busybox \
     && \
     ldd ./bin/busybox \
       | grep --only-matching --extended-regexp '/lib\S+' \
@@ -41,10 +29,6 @@ RUN mkdir -p ./bin ./sbin ./usr/bin ./usr/sbin \
     && \
     rm -rf ./lib*
 
-
-FROM build_base AS rootfs_builder
-
-COPY --from=busybox_builder /busybox-rootfs /busybox-rootfs
 WORKDIR /rootfs
 
 RUN mkdir -p ./etc ./home ./opt ./root ./run /tmp ./usr ./var/log \

diff --git a/images/base-glibc-busybox-bash/Dockerfile.busybox b/images/base-glibc-busybox-bash/Dockerfile.busybox
@@ -0,0 +1,23 @@
+# Build busybox ourselves to have more fine-grained control over what we want
+# (or not want) to include.
+# Use old Debian version to ensure compatible (low glibc requirement) binaries.
+FROM debian:9-slim AS busybox_builder
+RUN [ ! -f /etc/apt/sources.list ] || sed --in-place= --regexp-extended \
+      '/ stretch/ { s,-updates,-backports, ; s,/(deb|security)\.,/archive., }' \
+      /etc/apt/sources.list \
+    && \
+    apt-get update && \
+    DEBIAN_FRONTEND=noninteractive \
+      apt-get install --yes --no-install-recommends \
+      bzip2 curl ca-certificates tar \
+      gcc libc6-dev \
+      gcc-aarch64-linux-gnu libc6-dev-arm64-cross \
+      make patch
+
+WORKDIR /build
+COPY build-busybox ./
+ARG busybox_version
+RUN ./build-busybox \
+    "${busybox_version}" \
+    x86_64 aarch64
+
diff --git a/images/base-glibc-busybox-bash/build-busybox b/images/base-glibc-busybox-bash/build-busybox
@@ -125,10 +125,16 @@ build() {
 
 main() {
   version="${1}"
+  shift
   download
   patch
-  config
-  build
+  for target ; do
+    export MAKEFLAGS="ARCH=${target} CROSS_COMPILE=${target}-linux-gnu-"
+    make clean
+    config
+    build
+    cp -al ./busybox "./busybox.${target}"
+  done
 }
 
 main "${@}"