tests/docker: Add debian-microblaze-cross image

Build the entire cross tool chain from source.
For this reason, default to caching.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
[AJB: Update MAINTAINERS]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20211014224435.2539547-7-richard.henderson@linaro.org>
Reviewed-by: Willian Rampazzo <willianr@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211026102234.3961636-7-alex.bennee@linaro.org>

tests/docker/dockerfiles/debian-microblaze-cross.d/build-toolchain.sh

@@ -0,0 +1,88 @@
+#!/bin/bash
+
+set -e
+
+TARGET=microblaze-linux-musl
+LINUX_ARCH=microblaze
+
+J=$(expr $(nproc) / 2)
+TOOLCHAIN_INSTALL=/usr/local
+TOOLCHAIN_BIN=${TOOLCHAIN_INSTALL}/bin
+CROSS_SYSROOT=${TOOLCHAIN_INSTALL}/$TARGET/sys-root
+
+export PATH=${TOOLCHAIN_BIN}:$PATH
+
+#
+# Grab all of the source for the toolchain bootstrap.
+#
+
+wget https://ftp.gnu.org/gnu/binutils/binutils-2.37.tar.xz
+wget https://ftp.gnu.org/gnu/gcc/gcc-11.2.0/gcc-11.2.0.tar.xz
+wget https://www.musl-libc.org/releases/musl-1.2.2.tar.gz
+wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.70.tar.xz
+
+tar axf binutils-2.37.tar.xz
+tar axf gcc-11.2.0.tar.xz
+tar axf musl-1.2.2.tar.gz
+tar axf linux-5.10.70.tar.xz
+
+mv binutils-2.37 src-binu
+mv gcc-11.2.0 src-gcc
+mv musl-1.2.2 src-musl
+mv linux-5.10.70 src-linux
+
+mkdir -p bld-hdr bld-binu bld-gcc bld-musl
+mkdir -p ${CROSS_SYSROOT}/usr/include
+
+#
+# Install kernel headers
+#
+
+cd src-linux
+make headers_install ARCH=${LINUX_ARCH} INSTALL_HDR_PATH=${CROSS_SYSROOT}/usr
+cd ..
+
+#
+# Build binutils
+#
+
+cd bld-binu
+../src-binu/configure --disable-werror \
+  --prefix=${TOOLCHAIN_INSTALL} --with-sysroot --target=${TARGET}
+make -j${J}
+make install
+cd ..
+
+#
+# Build gcc, just the compiler so far.
+#
+
+cd bld-gcc
+../src-gcc/configure --disable-werror --disable-shared \
+  --prefix=${TOOLCHAIN_INSTALL} --with-sysroot --target=${TARGET} \
+  --enable-languages=c --disable-libssp --disable-libsanitizer \
+  --disable-libatomic --disable-libgomp --disable-libquadmath
+make -j${J} all-gcc
+make install-gcc
+cd ..
+
+#
+# Build musl.
+# We won't go through the extra step of building shared libraries
+# because we don't actually use them in QEMU docker testing.
+#
+
+cd bld-musl
+../src-musl/configure --prefix=/usr --host=${TARGET} --disable-shared
+make -j${j}
+make install DESTDIR=${CROSS_SYSROOT}
+cd ..
+
+#
+# Go back and build the compiler runtime
+#
+
+cd bld-gcc
+make -j${j}
+make install
+cd ..