[Qemu-devel] [PATCH v3 2/3] new: debian docker targets for cross-compiling

[Alex Bennée]

This provides a basic Debian install with access to the emdebian cross
compilers. The debian-armhf-cross and debian-arm64-cross targets build
on the basic Debian image to allow cross compiling to those targets.

To build against the cross compiler a cross-compile prefix needs to be
set in the configure options, for example:

  make address@hidden \
    EXTRA_CONFIGURE_OPTS="--cross-prefix=aarch64-linux-gnu-" \
    TARGET_LIST="aarch64-softmmu,aarch64-linux-user"

Signed-off-by: Alex Bennée <address@hidden>

---
v2
  - add clang (keep shippable happy)
  - rm adduser code (done direct now)
  - add aptitude (useful for debugging package clashes)
v3
  - split into debian, debian-armhf-cross and debian-aarch64-cross
---
 tests/docker/Makefile.include                      |  4 ++++
 tests/docker/dockerfiles/debian-arm64-cross.docker | 12 +++++++++++
 tests/docker/dockerfiles/debian-armhf-cross.docker | 12 +++++++++++
 tests/docker/dockerfiles/debian.docker             | 25 ++++++++++++++++++++++
 4 files changed, 53 insertions(+)
 create mode 100644 tests/docker/dockerfiles/debian-arm64-cross.docker
 create mode 100644 tests/docker/dockerfiles/debian-armhf-cross.docker
 create mode 100644 tests/docker/dockerfiles/debian.docker

diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
index 8db55e43aa..dbd12d9042 100644
--- a/tests/docker/Makefile.include
+++ b/tests/docker/Makefile.include
@@ -54,6 +54,10 @@ docker-image-%: $(DOCKER_FILES_DIR)/%.docker
                $(if $(EXECUTABLE),--include-executable=$(EXECUTABLE)),\
                "BUILD","$*")
 
+# Enforce dependancies for composite images
+docker-image-debian-armhf-cross: docker-image-debian
+docker-image-debian-arm64-cross: docker-image-debian
+
 # Expand all the pre-requistes for each docker image and test combination
 $(foreach i,$(DOCKER_IMAGES), \
        $(foreach t,$(DOCKER_TESTS) $(DOCKER_TOOLS), \
diff --git a/tests/docker/dockerfiles/debian-arm64-cross.docker 
b/tests/docker/dockerfiles/debian-arm64-cross.docker
new file mode 100644
index 0000000000..04212629f7
--- /dev/null
+++ b/tests/docker/dockerfiles/debian-arm64-cross.docker
@@ -0,0 +1,12 @@
+#
+# Docker arm64 cross-compiler target
+#
+# This docker target builds on the base debian image.
+#
+FROM qemu:debian
+
+# Add the foreign architecture we want and install dependacies
+RUN dpkg --add-architecture arm64
+RUN apt update
+RUN apt install -yy crossbuild-essential-arm64
+RUN apt-get build-dep -yy -a arm64 qemu
diff --git a/tests/docker/dockerfiles/debian-armhf-cross.docker 
b/tests/docker/dockerfiles/debian-armhf-cross.docker
new file mode 100644
index 0000000000..1377641e3e
--- /dev/null
+++ b/tests/docker/dockerfiles/debian-armhf-cross.docker
@@ -0,0 +1,12 @@
+#
+# Docker armhf cross-compiler target
+#
+# This docker target builds on the base debian image.
+#
+FROM qemu:debian
+
+# Add the foreign architecture we want and install dependacies
+RUN dpkg --add-architecture armhf
+RUN apt update
+RUN apt install -yy crossbuild-essential-armhf
+RUN apt-get build-dep -yy -a armhf qemu
diff --git a/tests/docker/dockerfiles/debian.docker 
b/tests/docker/dockerfiles/debian.docker
new file mode 100644
index 0000000000..52bd79938e
--- /dev/null
+++ b/tests/docker/dockerfiles/debian.docker
@@ -0,0 +1,25 @@
+#
+# Docker multiarch cross-compiler target
+#
+# This docker target is builds on Debian and Emdebian's cross compiler targets
+# to build distro with a selection of cross compilers for building test 
binaries.
+#
+# On its own you can't build much but the docker-foo-cross targets
+# build on top of the base debian image.
+#
+FROM debian:stable-slim
+
+# Setup some basic tools we need
+RUN apt update
+RUN apt install -yy curl aptitude
+
+# Setup Emdebian
+RUN echo "deb http://emdebian.org/tools/debian/ jessie main" >> 
/etc/apt/sources.list
+RUN curl http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | 
apt-key add -
+
+# Duplicate deb line as deb-src
+RUN cat /etc/apt/sources.list | sed "s/deb/deb-src/" >> /etc/apt/sources.list
+
+# Install common build utilities
+RUN apt update
+RUN apt install -yy build-essential clang
-- 
2.11.0