fixups in python_crosscompile_aarch64.sh
add --host=aarch64 to ./configure invocation
use protoc_qemu_wrapper.sh
diff --git a/kokoro/linux/aarch64/python_crosscompile_aarch64.sh b/kokoro/linux/aarch64/python_crosscompile_aarch64.sh
index 7933be4..08db37c 100755
--- a/kokoro/linux/aarch64/python_crosscompile_aarch64.sh
+++ b/kokoro/linux/aarch64/python_crosscompile_aarch64.sh
@@ -8,14 +8,20 @@
PYTHON="/opt/python/cp38-cp38/bin/python"
./autogen.sh
-CXXFLAGS="-fPIC -g -O2" ./configure
+CXXFLAGS="-fPIC -g -O2" ./configure --host=aarch64
make -j8
+# create a simple shell wrapper that runs crosscompiled protoc under qemu
+echo '#!/bin/bash' >protoc_qemu_wrapper.sh
+echo 'exec qemu-aarch64 "../src/protoc" "$@"' >>protoc_qemu_wrapper.sh
+chmod ugo+x protoc_qemu_wrapper.sh
+
+# PROTOC variable is by build_py step that runs under ./python directory
+export PROTOC=../protoc_qemu_wrapper.sh
+
pushd python
-# TODO: currently this step relies on qemu being registered with binfmt_misc so that
-# aarch64 binaries are automatically run with an emulator. This works well once
-# "sudo apt install qemu-user-static binfmt-support" is installed on the host machine.
+# NOTE: this step will use protoc_qemu_wrapper.sh to generate protobuf files.
${PYTHON} setup.py build_py
# when crosscompiling for aarch64, --plat-name needs to be set explicitly
