gitlab-ci: Add build for mips platform

This tests multiple items, (1) cross compilation, (2) compilation
on debian and (3) CI run on MIPS systems, tested under qemu. This target
was originally written for GnuTLS by Michael Weiser.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>
Reviewed-by: Andreas Schneider <asn@samba.org>

.gitlab-ci.yml

@@ -252,3 +252,28 @@ mingw32:
     when: on_failure
     paths:
       - build/
+
+.Debian.cross.template: &Debian_cross_template
+  stage: stage1-testing
+  image: $CI_REGISTRY/$BUILD_IMAGES_PROJECT:$DEBIAN_CROSS_BUILD
+  script:
+  - build=$(dpkg-architecture -qDEB_HOST_GNU_TYPE)
+  - host="${CI_JOB_NAME#*.cross.}"
+  - export CC="$(which $host-gcc)"
+  - export CXX="$(which $host-g++)"
+  - mkdir -p obj && cd obj && cmake -DUNIT_TESTING=ON -DCMAKE_BUILD_TYPE=Debug
+    -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON -DCMAKE_SYSTEM_NAME="$host"
+    -DWITH_PCAP=ON .. && make -j$(nproc)
+  - ctest --output-on-failure -j$(nproc)
+  tags:
+  - shared
+  except:
+  - tags
+  artifacts:
+    expire_in: 1 week
+    when: on_failure
+    paths:
+      - obj/
+
+Debian.cross.mips-linux-gnu:
+  <<: *Debian_cross_template