GH-44448: [C++] Add support for overwriting grpc_cpp_plugin path for …

…cross-compiling (#44507) ### Rationale for this change We can't use `find_package(gRPC)` and `gRPC::grpc_cpp_plugin` for cross-compiling because it's for host. We need `grpc_cpp_plugin` for target in cross-compiling. ### What changes are included in this PR? Add `ARROW_GRPC_CPP_PLUGIN` CMake option that overwrites `gRPC::grpc_cpp_plugin` path found by `find_package(gRPC)`. ### Are these changes tested? Yes. conda-forge/arrow-cpp-feedstock#1432 ### Are there any user-facing changes? Yes. * GitHub Issue: #44448 Authored-by: Sutou Kouhei <[email protected]> Signed-off-by: Sutou Kouhei <[email protected]>
apache · Oct 23, 2024 · 8eccbfe · 8eccbfe
1 parent 5ea3aa1
commit 8eccbfe
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diff --git a/cpp/cmake_modules/DefineOptions.cmake b/cpp/cmake_modules/DefineOptions.cmake
@@ -640,6 +640,11 @@ Always OFF if building binaries" OFF)
                        "Compiler flags to append when pre-compiling Gandiva operations"
                        "")
 
+  #----------------------------------------------------------------------
+  set_option_category("Cross compiling")
+
+  define_option_string(ARROW_GRPC_CPP_PLUGIN "grpc_cpp_plugin path to be used" "")
+
   #----------------------------------------------------------------------
   set_option_category("Advanced developer")
 

diff --git a/cpp/cmake_modules/ThirdpartyToolchain.cmake b/cpp/cmake_modules/ThirdpartyToolchain.cmake
@@ -4223,6 +4223,14 @@ if(ARROW_WITH_GRPC)
       target_link_libraries(gRPC::grpc++ INTERFACE gRPC::grpc_asan_suppressed)
     endif()
   endif()
+
+  if(ARROW_GRPC_CPP_PLUGIN)
+    if(NOT TARGET gRPC::grpc_cpp_plugin)
+      add_executable(gRPC::grpc_cpp_plugin IMPORTED)
+    endif()
+    set_target_properties(gRPC::grpc_cpp_plugin PROPERTIES IMPORTED_LOCATION
+                                                           ${ARROW_GRPC_CPP_PLUGIN})
+  endif()
 endif()
 
 # ----------------------------------------------------------------------