This commit fixes Dockerfile of the wasm build to support both of wasm32 and
wasm64 build. Dockerfile takes the following build argument and use it for
building dependencies.

- TARGET_CPU: target wasm arch (wasm32 or wasm64)

Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
---
 MAINTAINERS                                   |  2 +-
 ...2-cross.docker => emsdk-wasm-cross.docker} | 26 ++++++++++++++-----
 2 files changed, 20 insertions(+), 8 deletions(-)
 rename tests/docker/dockerfiles/{emsdk-wasm32-cross.docker => emsdk-wasm-cross.docker} (89%)

V5:
- Removed -sMEMORY64 from the environment variables (e.g. CFLAGS) in the
  QEMU compilation stage.
- Updated the Dockerfile to build dependencies always with -sMEMORY64=1 for
  wasm64 target. The final QEMU compilation can be lowered to wasm32 by
  using configure's --wasm64-32bit-address-limit flag which enables
  Emscripten's MEMORY64=2.

diff --git a/MAINTAINERS b/MAINTAINERS
index 9a55b649e8..22974fdd73 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -671,7 +671,7 @@ F: include/system/os-wasm.h
 F: os-wasm.c
 F: util/coroutine-wasm.c
 F: configs/meson/emscripten.txt
-F: tests/docker/dockerfiles/emsdk-wasm32-cross.docker
+F: tests/docker/dockerfiles/emsdk-wasm-cross.docker
 
 Alpha Machines
 --------------
diff --git a/tests/docker/dockerfiles/emsdk-wasm32-cross.docker b/tests/docker/dockerfiles/emsdk-wasm-cross.docker
similarity index 89%
rename from tests/docker/dockerfiles/emsdk-wasm32-cross.docker
rename to tests/docker/dockerfiles/emsdk-wasm-cross.docker
index 1f08eb0b85..ecd5a02903 100644
--- a/tests/docker/dockerfiles/emsdk-wasm32-cross.docker
+++ b/tests/docker/dockerfiles/emsdk-wasm-cross.docker
@@ -1,14 +1,15 @@
 # syntax = docker/dockerfile:1.5
 
-ARG EMSDK_VERSION_QEMU=3.1.50
+ARG EMSDK_VERSION_QEMU=4.0.10
 ARG ZLIB_VERSION=1.3.1
 ARG GLIB_MINOR_VERSION=2.84
 ARG GLIB_VERSION=${GLIB_MINOR_VERSION}.0
 ARG PIXMAN_VERSION=0.44.2
-ARG FFI_VERSION=v3.4.7
+ARG FFI_VERSION=v3.5.2
 ARG MESON_VERSION=1.5.0
+ARG TARGET_CPU=wasm32
 
-FROM docker.io/emscripten/emsdk:$EMSDK_VERSION_QEMU AS build-base
+FROM docker.io/emscripten/emsdk:$EMSDK_VERSION_QEMU AS build-base-common
 ARG MESON_VERSION
 ENV TARGET=/builddeps/target
 ENV CPATH="$TARGET/include"
@@ -29,12 +30,22 @@ RUN pip3 install meson==${MESON_VERSION} tomli
 RUN mkdir /build
 WORKDIR /build
 RUN mkdir -p $TARGET
+
+FROM build-base-common AS build-base-wasm32
+
+FROM build-base-common AS build-base-wasm64
+ENV CFLAGS="$CFLAGS -sMEMORY64=1"
+ENV CXXFLAGS="$CXXFLAGS -sMEMORY64=1"
+ENV LDFLAGS="$LDFLAGS -sMEMORY64=1"
+
+FROM build-base-${TARGET_CPU} AS build-base
+ARG TARGET_CPU
 RUN <<EOF
 cat <<EOT > /cross.meson
 [host_machine]
 system = 'emscripten'
-cpu_family = 'wasm32'
-cpu = 'wasm32'
+cpu_family = '${TARGET_CPU}'
+cpu = '${TARGET_CPU}'
 endian = 'little'
 
 [binaries]
@@ -56,13 +67,14 @@ RUN emconfigure ./configure --prefix=$TARGET --static
 RUN emmake make install -j$(nproc)
 
 FROM build-base AS libffi-dev
+ARG TARGET_CPU
 ARG FFI_VERSION
 RUN mkdir -p /libffi
 RUN git clone https://github.com/libffi/libffi /libffi
 WORKDIR /libffi
 RUN git checkout $FFI_VERSION
 RUN autoreconf -fiv
-RUN emconfigure ./configure --host=wasm32-unknown-linux \
+RUN emconfigure ./configure --host=${TARGET_CPU}-unknown-linux \
     --prefix=$TARGET --enable-static \
     --disable-shared --disable-dependency-tracking \
     --disable-builddir --disable-multi-os-directory \
@@ -140,6 +152,6 @@ RUN sed -i -E "/#define HAVE_POSIX_SPAWN 1/d" ./_build/config.h
 RUN sed -i -E "/#define HAVE_PTHREAD_GETNAME_NP 1/d" ./_build/config.h
 RUN meson install -C _build
 
-FROM build-base
+FROM build-base-common
 COPY --from=glib-dev /builddeps/ /builddeps/
 COPY --from=pixman-dev /builddeps/ /builddeps/
-- 
2.43.0