Add arm-rpi build

This build uses the Raspbian compiler, like the arm build on master
does. It seems to have fixed some nettle issues, but we previously saw
other issues with it. Because of this, it will temporarily be an
additional build.

Signed-off-by: Mcat12 <newtoncat12@yahoo.com>

.circleci/config.yml

@@ -35,6 +35,11 @@ jobs:
     environment:
       BIN_NAME: "pihole-FTL-arm-linux-gnueabi"
 
+  arm-rpi:
+    <<: *job_template
+    environment:
+      BIN_NAME: "pihole-FTL-armv6-linux-gnueabihf"
+
   armhf:
     <<: *job_template
     environment:

docker/arm-rpi/Dockerfile

@@ -0,0 +1,22 @@
+FROM debian:stretch
+
+RUN dpkg --add-architecture armhf && \
+    apt-get update && \
+    apt-get install -y --no-install-recommends nettle-dev:armhf libcap-dev:armhf \
+        make file wget netcat-traditional sqlite3 git ca-certificates ssh
+
+# Use Raspbian's GCC
+# This command was taken from https://github.com/dockcross/dockcross/blob/master/linux-armv6/Dockerfile
+# Slightly modified from the original
+RUN mkdir rpi_tools && cd rpi_tools && git init && git remote add origin https://github.com/raspberrypi/tools && \
+    git config core.sparseCheckout true && \
+    echo "arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64" >> .git/info/sparse-checkout && \
+    git pull --depth=1 origin master && \
+    cp -a arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/* /usr/ && rm -rf ../rpi_tools
+
+RUN wget ftl.pi-hole.net/libraries/libgmp.a -O /usr/local/lib/libgmp.a && \
+    wget ftl.pi-hole.net/libraries/libnettle.a -O /usr/local/lib/libnettle.a && \
+    wget ftl.pi-hole.net/libraries/libhogweed.a -O /usr/local/lib/libhogweed.a
+
+# Allow libnettle to be used, because this GCC doesn't have all the right header and library directories
+ENV CC "arm-linux-gnueabihf-gcc -I/usr/include -I/usr/include/arm-linux-gnueabihf"