cmake: Fix warning with CMP0177 policy

Author: jorisv

CMakeLists.txt

@@ -68,10 +68,26 @@ option(SUFFIX_SO_VERSION "Suffix library name with its version" OFF)
 option(BUILD_TESTING_SCIPY
        "Build the SciPy tests (scipy should be installed on the machine)" ON)
 
+# ----------------------------------------------------
+# --- Policy -----------------------------------------
+# CMake Policy setup
+# ----------------------------------------------------
+# Policy can be removed when cmake_minimum_required is updated.
+
+# We also set CMAKE_POLICY_DEFAULT_CMPXXXX because CMake modules can reset
+# policy and redefine some macros like `find_dependency` that will not use our
+# policy.
+
 # Use BoostConfig module distributed by boost library instead of using FindBoost
-# module distributed by CMake
+# module distributed by CMake (to remove in 3.30).
 if(POLICY CMP0167)
   cmake_policy(SET CMP0167 NEW)
+  set(CMAKE_POLICY_DEFAULT_CMP0167 NEW)
+endif()
+# install() DESTINATION paths are normalized (to remove in 3.31).
+if(POLICY CMP0177)
+  cmake_policy(SET CMP0177 NEW)
+  set(CMAKE_POLICY_DEFAULT_CMP0177 NEW)
 endif()
 include("${JRL_CMAKE_MODULES}/base.cmake")
 compute_project_args(PROJECT_ARGS LANGUAGES CXX)