try use 3.29

Author: sdcb

.github/workflows/paddle-build.yml

@@ -43,6 +43,11 @@ jobs:
           - { os: macos-13,         name: openblas,             cmake_flags: "-DWITH_ONNXRUNTIME=ON" }
           - { os: macos-15,         name: openblas,             cmake_flags: "-DWITH_ARM=ON" }
     steps:
+    - name: Setup CMake 3.29.x
+      # Downgrade to CMake 3.29 to avoid policy / ExternalProject regressions seen in 4.12
+      uses: jwlawson/actions-setup-cmake@v2
+      with:
+        cmake-version: 3.29.6
     - name: Setup dependencies
       shell: bash
       run: |

build/cmake.patch

@@ -23,36 +23,6 @@ index 90184b6fde..109282af09 100755
 
  get_directory_property(all_inc_dirs INCLUDE_DIRECTORIES)
  list(JOIN all_inc_dirs "\r\n" all_inc_dirs)
-diff --git a/cmake/external/gflags.cmake b/cmake/external/gflags.cmake
-index b36006a55c..f304d20f9f 100755
---- a/cmake/external/gflags.cmake
-+++ b/cmake/external/gflags.cmake
-@@ -45,12 +45,6 @@ ExternalProject_Add(
-   INSTALL_COMMAND ${INSTALL_COMMAND}
-   CMAKE_ARGS -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
-              -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
--             -DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}
--             -DCMAKE_CXX_FLAGS_RELEASE=${CMAKE_CXX_FLAGS_RELEASE}
--             -DCMAKE_CXX_FLAGS_DEBUG=${CMAKE_CXX_FLAGS_DEBUG}
--             -DCMAKE_C_FLAGS=${CMAKE_C_FLAGS}
--             -DCMAKE_C_FLAGS_DEBUG=${CMAKE_C_FLAGS_DEBUG}
--             -DCMAKE_C_FLAGS_RELEASE=${CMAKE_C_FLAGS_RELEASE}
-              -DBUILD_STATIC_LIBS=ON
-              -DCMAKE_INSTALL_PREFIX=${GFLAGS_INSTALL_DIR}
-              -DCMAKE_POSITION_INDEPENDENT_CODE=ON
-@@ -61,6 +55,12 @@ ExternalProject_Add(
-     -DCMAKE_INSTALL_PREFIX:PATH=${GFLAGS_INSTALL_DIR}
-     -DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=ON
-     -DCMAKE_BUILD_TYPE:STRING=${THIRD_PARTY_BUILD_TYPE}
-+    -DCMAKE_CXX_FLAGS:STRING=${CMAKE_CXX_FLAGS}
-+    -DCMAKE_CXX_FLAGS_RELEASE:STRING=${CMAKE_CXX_FLAGS_RELEASE}
-+    -DCMAKE_CXX_FLAGS_DEBUG:STRING=${CMAKE_CXX_FLAGS_DEBUG}
-+    -DCMAKE_C_FLAGS:STRING=${CMAKE_C_FLAGS}
-+    -DCMAKE_C_FLAGS_DEBUG:STRING=${CMAKE_C_FLAGS_DEBUG}
-+    -DCMAKE_C_FLAGS_RELEASE:STRING=${CMAKE_C_FLAGS_RELEASE}
-   BUILD_BYPRODUCTS ${GFLAGS_LIBRARIES})
- 
- add_library(gflags STATIC IMPORTED GLOBAL)
 diff --git a/cmake/generic.cmake b/cmake/generic.cmake
 index e977207378..e3756a5e1d 100644
 --- a/cmake/generic.cmake