cmake: share backend policy setup without warning regressions

Copilot · Youw · web-flow · commit 5a0a29b67aac · 2026-05-19T13:23:27.000Z
Agent-Logs-Url: https://github.com/libusb/hidapi/sessions/c4b6aaeb-8b94-4451-a245-d4a6fe7f7421 Co-authored-by: Youw <5939659+Youw@users.noreply.github.com>
diff --git a/libusb/CMakeLists.txt b/libusb/CMakeLists.txt
@@ -1,11 +1,6 @@
 cmake_minimum_required(VERSION 3.6.3...3.25 FATAL_ERROR)
 
-foreach(HIDAPI_CMAKE_POLICY CMP0156 CMP0179 CMP0181 CMP0200)
-    if(POLICY ${HIDAPI_CMAKE_POLICY})
-        cmake_policy(SET ${HIDAPI_CMAKE_POLICY} NEW)
-    endif()
-endforeach()
-unset(HIDAPI_CMAKE_POLICY)
+include("${PROJECT_ROOT}/src/cmake/hidapi-policies.cmake" NO_POLICY_SCOPE)
 
 list(APPEND HIDAPI_PUBLIC_HEADERS "hidapi_libusb.h")
 
diff --git a/linux/CMakeLists.txt b/linux/CMakeLists.txt
@@ -1,11 +1,6 @@
 cmake_minimum_required(VERSION 3.6.3...3.25 FATAL_ERROR)
 
-foreach(HIDAPI_CMAKE_POLICY CMP0156 CMP0179 CMP0181 CMP0200)
-    if(POLICY ${HIDAPI_CMAKE_POLICY})
-        cmake_policy(SET ${HIDAPI_CMAKE_POLICY} NEW)
-    endif()
-endforeach()
-unset(HIDAPI_CMAKE_POLICY)
+include("${PROJECT_ROOT}/src/cmake/hidapi-policies.cmake" NO_POLICY_SCOPE)
 
 add_library(hidapi_hidraw
     ${HIDAPI_PUBLIC_HEADERS}
diff --git a/mac/CMakeLists.txt b/mac/CMakeLists.txt
@@ -1,11 +1,6 @@
 cmake_minimum_required(VERSION 3.4.3...3.25 FATAL_ERROR)
 
-foreach(HIDAPI_CMAKE_POLICY CMP0156 CMP0179 CMP0181 CMP0200)
-    if(POLICY ${HIDAPI_CMAKE_POLICY})
-        cmake_policy(SET ${HIDAPI_CMAKE_POLICY} NEW)
-    endif()
-endforeach()
-unset(HIDAPI_CMAKE_POLICY)
+include("${PROJECT_ROOT}/src/cmake/hidapi-policies.cmake" NO_POLICY_SCOPE)
 
 list(APPEND HIDAPI_PUBLIC_HEADERS "hidapi_darwin.h")
 
diff --git a/netbsd/CMakeLists.txt b/netbsd/CMakeLists.txt
@@ -1,11 +1,6 @@
 cmake_minimum_required(VERSION 3.6.3...3.25 FATAL_ERROR)
 
-foreach(HIDAPI_CMAKE_POLICY CMP0156 CMP0179 CMP0181 CMP0200)
-    if(POLICY ${HIDAPI_CMAKE_POLICY})
-        cmake_policy(SET ${HIDAPI_CMAKE_POLICY} NEW)
-    endif()
-endforeach()
-unset(HIDAPI_CMAKE_POLICY)
+include("${PROJECT_ROOT}/src/cmake/hidapi-policies.cmake" NO_POLICY_SCOPE)
 
 add_library(hidapi_netbsd
     ${HIDAPI_PUBLIC_HEADERS}
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
@@ -26,12 +26,7 @@ project(hidapi VERSION "${VERSION}" LANGUAGES C)
 
 # Defaults and required options
 
-foreach(HIDAPI_CMAKE_POLICY CMP0156 CMP0179 CMP0181 CMP0200)
-    if(POLICY ${HIDAPI_CMAKE_POLICY})
-        cmake_policy(SET ${HIDAPI_CMAKE_POLICY} NEW)
-    endif()
-endforeach()
-unset(HIDAPI_CMAKE_POLICY)
+include("${PROJECT_ROOT}/src/cmake/hidapi-policies.cmake" NO_POLICY_SCOPE)
 
 if(NOT DEFINED HIDAPI_WITH_TESTS)
     set(HIDAPI_WITH_TESTS OFF)
diff --git a/src/cmake/hidapi-policies.cmake b/src/cmake/hidapi-policies.cmake
@@ -0,0 +1,6 @@
+foreach(HIDAPI_CMAKE_POLICY CMP0156 CMP0179 CMP0181 CMP0200)
+    if(POLICY ${HIDAPI_CMAKE_POLICY})
+        cmake_policy(SET ${HIDAPI_CMAKE_POLICY} NEW)
+    endif()
+endforeach()
+unset(HIDAPI_CMAKE_POLICY)
