tests/docker: use a gcc-10 based image for arm64 tests

As we enable newer features that we want to test on arm64 targets we
need newer compilers. Split off a new debian-arm64-test-cross image
which we can use to build these new tests.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200520140541.30256-11-alex.bennee@linaro.org>

tests/docker/Makefile.include

@@ -131,9 +131,11 @@ docker-image-travis: NOUSER=1
 
 # Specialist build images, sometimes very limited tools
 docker-image-tricore-cross: docker-image-debian9
+docker-image-debian-arm64-test-cross: docker-image-debian11
 
 # These images may be good enough for building tests but not for test builds
 DOCKER_PARTIAL_IMAGES += debian-alpha-cross
+DOCKER_PARTIAL_IMAGES += debian-arm64-test-cross
 DOCKER_PARTIAL_IMAGES += debian-hppa-cross
 DOCKER_PARTIAL_IMAGES += debian-m68k-cross debian-mips64-cross
 DOCKER_PARTIAL_IMAGES += debian-powerpc-cross debian-ppc64-cross

tests/docker/dockerfiles/debian-arm64-test-cross.docker

@@ -0,0 +1,13 @@
+#
+# Docker arm64 cross-compiler target (tests only)
+#
+# This docker target builds on the debian Bullseye base image.
+#
+FROM qemu:debian11
+
+# Add the foreign architecture we want and install dependencies
+RUN dpkg --add-architecture arm64
+RUN apt update && \
+    DEBIAN_FRONTEND=noninteractive eatmydata \
+        apt install -y --no-install-recommends \
+        crossbuild-essential-arm64 gcc-10-aarch64-linux-gnu

tests/tcg/configure.sh

@@ -97,8 +97,8 @@ for target in $target_list; do
   case $target in
     aarch64-*)
       # We don't have any bigendian build tools so we only use this for AArch64
-      container_image=debian-arm64-cross
-      container_cross_cc=aarch64-linux-gnu-gcc
+      container_image=debian-arm64-test-cross
+      container_cross_cc=aarch64-linux-gnu-gcc-10
       ;;
     alpha-*)
       container_image=debian-alpha-cross