(arrow) branch main updated: GH-48725: [C++] Fix bundled Protobuf doesn't exist in libarrow_bundled_dependencies (#48726)

[ko...@apache.org]

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kou pushed a commit to branch main
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The following commit(s) were added to refs/heads/main by this push:
     new 4f1cac1948 GH-48725: [C++] Fix bundled Protobuf doesn't exist in libarrow_bundled_dependencies (#48726)
4f1cac1948 is described below

commit 4f1cac1948f191001e86b5a344cefea0cdb35b5f
Author: Sutou Kouhei <ko...@clear-code.com>
AuthorDate: Tue Jan 6 16:40:21 2026 +0900

    GH-48725: [C++] Fix bundled Protobuf doesn't exist in libarrow_bundled_dependencies (#48726)
    
    ### Rationale for this change
    
    We need to update `ARROW_BUNDLED_STATIC_LIBS` in the parent scope because GH-48183 changed to `function(build_protobuf)` from `macro(build_protobuf)`.
    
    ### What changes are included in this PR?
    
    Update `ARROW_BUNDLED_STATIC_LIBS` in the parent scope.
    
    ### Are these changes tested?
    
    Yes.
    
    ### Are there any user-facing changes?
    
    Yes.
    * GitHub Issue: #48725
    
    Authored-by: Sutou Kouhei <ko...@clear-code.com>
    Signed-off-by: Sutou Kouhei <ko...@clear-code.com>
---
 cpp/cmake_modules/ThirdpartyToolchain.cmake | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cpp/cmake_modules/ThirdpartyToolchain.cmake b/cpp/cmake_modules/ThirdpartyToolchain.cmake
index 8a26b46d0b..42fa5e34b3 100644
--- a/cpp/cmake_modules/ThirdpartyToolchain.cmake
+++ b/cpp/cmake_modules/ThirdpartyToolchain.cmake
@@ -1974,7 +1974,9 @@ function(build_protobuf)
 
   # Make protobuf_fc depend on the install completion marker
   add_custom_target(protobuf_fc DEPENDS "${PROTOBUF_PREFIX}/.protobuf_installed")
-  list(APPEND ARROW_BUNDLED_STATIC_LIBS protobuf::libprotobuf)
+  set(ARROW_BUNDLED_STATIC_LIBS
+      ${ARROW_BUNDLED_STATIC_LIBS} protobuf::libprotobuf
+      PARENT_SCOPE)
 
   if(CMAKE_CROSSCOMPILING)
     # If we are cross compiling, we need to build protoc for the host