[system] Upgrade to Stretch

Author: JakubVanek

README.md

@@ -45,13 +45,13 @@ JShell JDI agent on the remote side, which is handled by SSH as well.
 2. Adjust the JAVA_VERSION variable in `build/config.sh` to match the current OpenJDK tip: [OpenJDK 9 updates](http://hg.openjdk.java.net/jdk-updates/jdk9u/)
 3. Build the jdk9 cross-compilation environment:
 ```sh
-sudo docker build -t ev3dev-lang-java:jdk9-system -f build/Dockerfile.system  build
-sudo docker build -t ev3dev-lang-java:jdk9-build  -f build/Dockerfile.scripts build
+sudo docker build -t ev3dev-lang-java:jdk-stretch -f build/Dockerfile.system  build
+sudo docker build -t ev3dev-lang-java:jdk-build   -f build/Dockerfile.scripts build
 ```
 4. Run the newly prepared container. You have to mount a host directory to the the `/build` directory in the container,
 otherwise the build would get discarded. The final build needs at least 6.5 GB of free space (in the build directory).
 ```
-sudo docker run --rm -it -v <path on host, where the sources should be stored>:/build ev3dev-lang-java:jdk9-build
+sudo docker run --rm -it -v <path on host, where the sources should be stored>:/build ev3dev-lang-java:jdk-build
 ```
 5. Let's fetch the OpenJDK sources:
 ```

build/Dockerfile.scripts

@@ -1,4 +1,4 @@
-FROM ev3dev-lang-java:jdk9-system
+FROM ev3dev-lang-java:jdk-stretch
 
 # copy build patches & scripts
 COPY *.patch *.sh /opt/jdkcross/

build/Dockerfile.system

@@ -1,20 +1,19 @@
-FROM debian:jessie
+FROM debian:stretch
 
-# this is a customized version of ev3dev-jessie-cross image
+# this is a customized version of ev3dev-stretch-cross image
 
 # setup repositories and install required packages
 COPY apt.sources.list.debian /etc/apt/sources.list
+COPY ev3dev-archive-keyring.gpg /etc/apt/trusted.gpg.d/
 RUN dpkg --add-architecture armel && \
-    apt-key adv --keyserver pgp.mit.edu --recv-keys D57D95AF93178A7C && \
-    apt-key adv --keyserver pgp.mit.edu --recv-keys 7DE089671804772E && \
     apt-get update && \
     DEBIAN_FRONTEND=noninteractive apt-get install --yes --no-install-recommends \
         bash-completion \
         ca-certificates \
         cmake \
         build-essential \
         crossbuild-essential-armel \
-        gdb \
+        gdb-multiarch \
         less \
         man-db \
         nano \

build/apt.sources.list.debian

@@ -1,4 +1,3 @@
-deb http://ftp.debian.org/debian      jessie         main contrib non-free
-deb http://security.debian.org/       jessie/updates main contrib non-free
-deb http://archive.ev3dev.org/debian  jessie         main
-deb http://emdebian.org/tools/debian/ jessie         main
+deb http://deb.debian.org/debian          stretch         main contrib non-free
+deb http://deb.debian.org/debian-security stretch/updates main contrib non-free
+deb http://archive.ev3dev.org/debian      stretch         main