ensure cmake is installed

Author: lovasoa

Dockerfile

@@ -6,17 +6,17 @@ RUN apt-get update && \
     if [ "$TARGETARCH" = "$BUILDARCH" ]; then \
         rustup target list --installed > TARGET && \
         echo gcc > LINKER && \
-        apt-get install -y gcc libgcc-s1 && \
+        apt-get install -y gcc libgcc-s1 cmake && \
         cp /lib/*/libgcc_s.so.1 .; \
     elif [ "$TARGETARCH" = "arm64" ]; then \
         echo aarch64-unknown-linux-gnu > TARGET && \
         echo aarch64-linux-gnu-gcc > LINKER && \
-        apt-get install -y gcc-aarch64-linux-gnu libgcc-s1-arm64-cross && \
+        apt-get install -y gcc-aarch64-linux-gnu libgcc-s1-arm64-cross cmake && \
         cp /usr/aarch64-linux-gnu/lib/libgcc_s.so.1 .; \
     elif [ "$TARGETARCH" = "arm" ]; then \
         echo armv7-unknown-linux-gnueabihf > TARGET && \
         echo arm-linux-gnueabihf-gcc > LINKER && \
-        apt-get install -y gcc-arm-linux-gnueabihf libgcc-s1-armhf-cross && \
+        apt-get install -y gcc-arm-linux-gnueabihf libgcc-s1-armhf-cross cmake && \
         cp /usr/arm-linux-gnueabihf/lib/libgcc_s.so.1 .; \
     else \
         echo "Unsupported cross compilation target: $TARGETARCH"; \