kou commented on code in PR #45981:
URL: https://github.com/apache/arrow/pull/45981#discussion_r2024257546
##########
cpp/cmake_modules/ThirdpartyToolchain.cmake:
##########
@@ -958,6 +958,9 @@ set(EP_COMMON_CMAKE_ARGS
-DCMAKE_INSTALL_LIBDIR=lib
-DCMAKE_OSX_SYSROOT=${CMAKE_OSX_SYSROOT}
-DCMAKE_VERBOSE_MAKEFILE=${CMAKE_VERBOSE_MAKEFILE}
+ # We set CMAKE_POLICY_VERSION_MINIMUM temporarily due to failures with
CMake 4
+ # We should remove it once we have updated the dependencies:
+ # https://github.com/apache/arrow/issues/45985
-DCMAKE_POLICY_VERSION_MINIMUM=3.5)
Review Comment:
Can we disable this in `build_snappy`?
```diff
diff --git a/cpp/cmake_modules/ThirdpartyToolchain.cmake
b/cpp/cmake_modules/ThirdpartyToolchain.cmake
index f4de617ced..21676ea5f1 100644
--- a/cpp/cmake_modules/ThirdpartyToolchain.cmake
+++ b/cpp/cmake_modules/ThirdpartyToolchain.cmake
@@ -1387,6 +1387,9 @@ macro(build_snappy)
set(SNAPPY_CMAKE_ARGS
${EP_COMMON_CMAKE_ARGS} -DSNAPPY_BUILD_TESTS=OFF
-DSNAPPY_BUILD_BENCHMARKS=OFF
"-DCMAKE_INSTALL_PREFIX=${SNAPPY_PREFIX}")
+ # We can remove this once we remove -DCMAKE_POLICY_VERSION_MINIMUM=3.5
+ # from EP_COMMON_CMAKE_ARGS.
+ list(REMOVE_ITEM SNAPPY_CMAKE_ARGS -DCMAKE_POLICY_VERSION_MINIMUM=3.5)
# Snappy unconditionally enables -Werror when building with clang this
can lead
# to build failures by way of new compiler warnings. This adds a flag to
disable
# -Werror to the very end of the invocation to override the snappy
internal setting.
```
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