Test cmake

Author: LDong-Arm

.travis.yml

@@ -20,6 +20,9 @@ dist: focal
 
 addons:
   apt:
+    sources:
+      - sourceline: 'deb https://apt.kitware.com/ubuntu/ focal main'
+        key_url: 'https://apt.kitware.com/keys/kitware-archive-latest.asc'
     packages:
       - cmake
       - srecord
@@ -46,6 +49,14 @@ matrix:
       language: python
       python: 3.8
       install:
+        # Hide Travis-preinstalled CMake
+        # The Travis-preinstalled CMake is unfortunately not installed via apt, so we
+        # can't replace it with an apt-supplied version very easily. Additionally, we
+        # can't permit the Travis-preinstalled copy to survive, as the Travis default
+        # path lists the Travis CMake install location ahead of any place where apt
+        # would install CMake to. Instead of apt removing or upgrading to a new CMake
+        # version, we must instead delete the Travis copy of CMake.
+        - sudo rm -rf /usr/local/cmake*
         # Install arm-none-eabi-gcc
         - pushd /home/travis/build && mkdir arm-gcc && cd arm-gcc
         - curl -L0 "https://developer.arm.com/-/media/Files/downloads/gnu-rm/9-2019q4/gcc-arm-none-eabi-9-2019-q4-major-x86_64-linux.tar.bz2?revision=108bd959-44bd-4619-9c19-26187abf5225&la=en&hash=E788CE92E5DFD64B2A8C246BBA91A249CB8E2D2D" --output gcc-arm-none-eabi-9-2019-q4-major.tar.bz2