CMake: Force version 3.5

.travis.yml

@@ -15,9 +15,21 @@ addons:
     - libasound2-dev
     - libpulse-dev
     - libudev-dev
-    - cmake
 
 install:
+- DEPS_DIR="${TRAVIS_BUILD_DIR}/deps"
+- mkdir -p ${DEPS_DIR} && cd ${DEPS_DIR}
+- |
+  if [[ "${TRAVIS_OS_NAME}" == "linux" ]]; then
+    CMAKE_URL="http://www.cmake.org/files/v3.5/cmake-3.5.2-Linux-x86_64.tar.gz"
+    mkdir cmake && travis_retry wget --no-check-certificate --quiet -O - ${CMAKE_URL} | tar --strip-components=1 -xz -C cmake
+    export PATH=${DEPS_DIR}/cmake/bin:${PATH}
+  else
+    if ! brew ls --version cmake &>/dev/null; then brew install cmake; fi
+  fi
+- cd ${TRAVIS_BUILD_DIR}
+- cmake --version
+
 - git submodule init
 - git submodule update
 - mkdir out

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.5)
 project(libwebrtc)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}

Targets/libwebrtc/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.5)
 project(libwebrtc)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}