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Build on OpenWRT

Please follow this tutorial to build and test WasmEdge in OpenWrt(x86_64) from source code.


Currently, we only support the runtime for the interpreter mode.

Prepare the Environment


First, we need to obtain the source code of OpenWrt and install the relevant tools to compile OpenWrt. The following commands take Debian / Ubuntu system as an example. For commands to install OpenWrt compilation tools in other host systems, see Building OpenWrt System Settings.

$ git clone
$ sudo apt update
$ sudo apt install build-essential ccache ecj fastjar file g++ gawk \
gettext git java-propose-classpath libelf-dev libncurses5-dev \
libncursesw5-dev libssl-dev python python2.7-dev python3 unzip wget \
python-distutils-extra python3-setuptools python3-dev rsync subversion \
swig time xsltproc zlib1g-dev

Then, obtain all the latest package definitions of OpenWrt and install the symlinks for all obtained packages.

cd openwrt
./scripts/feeds update -a
./scripts/feeds install -a

Build WasmEdge

Get WasmEdge source code

git clone
cd WasmEdge

Run the build script

Run the build script in WasmEdge source code and input the path of the OpenWrt source code as parameter. This script will automatically add the WasmEdge into the packages list which will be built of OpenWrt, and build the OpenWrt firmware. The generated OpenWrt images are in the openwrt/bin/targets/x86/64 folder.

./utils/openwrt/ ~/openwrt

When running the build script, the OpenWrt configuration interface will appear. In this interface, we need to set Target System to x86, Target Profile to Generic x86/64, and find WasmEdge in the Runtime column and check it. Once set up, the script automatically builds WasmEdge and compiles the OpenWrt system.


Deploy OpenWrt in VMware

To verify the availability of WasmEdge, we use a VMware virtual machine to install the compiled OpenWrt image. Before creating a virtual machine, we must use the QEMU command to convert the OpenWrt image to vmdk format.

cd ~/openwrt/bin/targets/x86/64
sudo apt install qemu
gunzip openwrt-x86-64-generic-squashfs-combined.img.gz
qemu-img convert -f raw -O vmdk openwrt-x86-64-generic-squashfs-combined.img Openwrt.vmdk

After that, create a virtual machine in VMware and install the OpenWrt system.

Upload the test files

After setting the IP address of OpenWrt according to the gateway of the host, use scp to transfer the wasm file on the host to the OpenWrt system.

For example, we set the IP address of OpenWrt as, then we use the following commands to upload hello.wasm (compiled from this example) and add.wasm (in text format) these two test files to OpenWrt.

scp hello.wasm root@
scp add.wasm root@

Test the Wasmedge program

$ wasmedge hello.wasm second state
$ wasmedge --reactor add.wasm add 2 2