🔧 build cmake

.drone.yml

@@ -8,6 +8,11 @@ steps:
 - name: build
   image: gcc
   commands:
+  - wget https://github.com/Kitware/CMake/releases/download/v3.20.2/cmake-3.20.2.tar.gz
+  - tar xfz cmake-3.20.2.tar.gz
+  - cd cmake-3.20.2
+  - ./configure
+  - make
   - mkdir build
   - cd build
   - cmake ..