Add a cmake build as well

.drone.yml

@@ -41,3 +41,47 @@ steps:
     - make -C test $COMMON_FLAGS
     - make -C ctest $COMMON_FLAGS
     - make -C utest $COMMON_FLAGS
+
+---
+kind: pipeline
+name: arm64_gcc_cmake
+
+platform:
+  os: linux
+  arch: arm64
+
+steps:
+- name: Build and Test
+  image: ubuntu:18.04
+  environment:
+    CC: gcc
+    CMAKE_FLAGS: '-DDYNAMIC_ARCH=1 -DTARGET=ARMV8 -DNUM_THREADS=32'
+  commands:
+    - apt-get update -y
+    - apt-get install -y make $CC gfortran perl cmake
+    - mkdir build && cd build
+    - cmake $CMAKE_FLAGS ..
+    - cmake --build .
+    - ctest
+
+---
+kind: pipeline
+name: arm64_clang_cmake
+
+platform:
+  os: linux
+  arch: arm64
+
+steps:
+- name: Build and Test
+  image: ubuntu:18.04
+  environment:
+    CC: clang
+    CMAKE_FLAGS: '-DDYNAMIC_ARCH=1 -DTARGET=ARMV8 -DNUM_THREADS=32'
+  commands:
+    - apt-get update -y
+    - apt-get install -y make $CC gfortran perl cmake
+    - mkdir build && cd build
+    - cmake $CMAKE_FLAGS ..
+    - cmake --build .
+    - ctest