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

- TARGET_CPU: target wasm arch (wasm32 or wasm64)
- WASM64_MEMORY64: target -sMEMORY64 mode (1 or 2)

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} | 29 ++++++++++++++-----
 2 files changed, 23 insertions(+), 8 deletions(-)
 rename tests/docker/dockerfiles/{emsdk-wasm32-cross.docker => emsdk-wasm-cross.docker} (85%)

V3:
- This commit is under review in another patch series so please ignore it
  here.

diff --git a/MAINTAINERS b/MAINTAINERS
index a07086ed76..433a44118d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -647,7 +647,7 @@ 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 85%
rename from tests/docker/dockerfiles/emsdk-wasm32-cross.docker
rename to tests/docker/dockerfiles/emsdk-wasm-cross.docker
index 60a7d02f56..4b41be62ab 100644
--- a/tests/docker/dockerfiles/emsdk-wasm32-cross.docker
+++ b/tests/docker/dockerfiles/emsdk-wasm-cross.docker
@@ -1,14 +1,17 @@
 # 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
+ARG WASM64_MEMORY64=0
 
-FROM emscripten/emsdk:$EMSDK_VERSION_QEMU AS build-base
+FROM emscripten/emsdk:$EMSDK_VERSION_QEMU AS build-base-common
+ARG TARGET_CPU
 ARG MESON_VERSION
 ENV TARGET=/builddeps/target
 ENV CPATH="$TARGET/include"
@@ -33,8 +36,8 @@ RUN <<EOF
 cat <<EOT > /cross.meson
 [host_machine]
 system = 'emscripten'
-cpu_family = 'wasm32'
-cpu = 'wasm32'
+cpu_family = '${TARGET_CPU}'
+cpu = '${TARGET_CPU}'
 endian = 'little'
 
 [binaries]
@@ -46,6 +49,16 @@ pkgconfig = ['pkg-config', '--static']
 EOT
 EOF
 
+FROM build-base-common AS build-base-wasm32
+
+FROM build-base-common AS build-base-wasm64
+ARG WASM64_MEMORY64
+ENV CFLAGS="$CFLAGS -sMEMORY64=${WASM64_MEMORY64}"
+ENV CXXFLAGS="$CXXFLAGS -sMEMORY64=${WASM64_MEMORY64}"
+ENV LDFLAGS="$LDFLAGS -sMEMORY64=${WASM64_MEMORY64}"
+
+FROM build-base-${TARGET_CPU} AS build-base
+
 FROM build-base AS zlib-dev
 ARG ZLIB_VERSION
 RUN mkdir -p /zlib
@@ -56,17 +69,19 @@ RUN emconfigure ./configure --prefix=$TARGET --static
 RUN emmake make install -j$(nproc)
 
 FROM build-base AS libffi-dev
+ARG TARGET_CPU
+ARG WASM64_MEMORY64
 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=$TARGET --enable-static \
     --disable-shared --disable-dependency-tracking \
     --disable-builddir --disable-multi-os-directory \
-    --disable-raw-api --disable-docs
+    --disable-raw-api --disable-docs WASM64_MEMORY64=${WASM64_MEMORY64}
 RUN emmake make install SUBDIRS='include' -j$(nproc)
 
 FROM build-base AS pixman-dev
-- 
2.43.0