Add libxml2 dependency.

docker/Dockerfile

@@ -1,5 +1,5 @@
 FROM multiarch/alpine:${TARGETARCH}${TARGETVARIANT}-latest-stable AS build
-RUN apk add --no-cache alpine-sdk gcc linux-headers librtlsdr-dev cmake libusb-dev bash
+RUN apk add --no-cache alpine-sdk gcc linux-headers librtlsdr-dev libxml2-dev cmake libusb-dev bash
 RUN git clone https://github.com/wmbusmeters/wmbusmeters.git && \
     git clone https://github.com/weetmuts/rtl-wmbus.git && \
     git clone https://github.com/merbanan/rtl_433.git
@@ -12,7 +12,7 @@ RUN mkdir build && cd build && cmake ../ && make
 
 FROM multiarch/alpine:${TARGETARCH}${TARGETVARIANT}-latest-stable as scratch
 ENV QEMU_EXECVE=1
-RUN apk add --no-cache mosquitto-clients libstdc++ curl libusb rtl-sdr netcat-openbsd
+RUN apk add --no-cache mosquitto-clients libstdc++ curl libusb rtl-sdr libxml2 netcat-openbsd
 WORKDIR /wmbusmeters
 COPY --from=build /wmbusmeters/build/wmbusmeters /wmbusmeters/wmbusmeters
 COPY --from=build /rtl-wmbus/build/rtl_wmbus /usr/bin/rtl_wmbus

snap/snapcraft.yaml

@@ -49,6 +49,7 @@ parts:
       - g++
       - make
       - librtlsdr-dev
+      - libxml2-dev
     stage-packages:
       - mosquitto-clients
       - curl
@@ -56,6 +57,7 @@ parts:
       - sysvinit-utils
       - libusb-1.0-0
       - rtl-sdr
+      - libxml2
     prime:
       - sbin/
       - usr/bin/