limit compat scope to only 32 bit windows

Author: WillAyd

cpp/src/arrow/compute/CMakeLists.txt

@@ -48,7 +48,7 @@ if(ARROW_TESTING AND ARROW_COMPUTE)
   add_library(arrow_compute_testing OBJECT ${ARROW_COMPUTE_TESTING_SRCS})
   # Even though this is still just an object library we still need to "link"
   # arrow_compute_core_testing so that is also included correctly
-  if(WIN32)
+  if(WIN32 AND (CMAKE_SIZEOF_VOID_P EQUAL 4))
     target_link_libraries(arrow_compute_testing
                           PUBLIC $<TARGET_OBJECTS:arrow_compute_core_testing>
                           PUBLIC ${ARROW_GTEST_GTEST_MAIN})

cpp/src/arrow/compute/test_env.cc

@@ -35,15 +35,15 @@ class ComputeKernelEnvironment : public ::testing::Environment {
 
 }  // namespace
 
-#ifdef _WIN32
+#if defined(_WIN32) && !defined(_WIN64)
 // Initialize the compute module
 ::testing::Environment* compute_kernels_env =
     ::testing::AddGlobalTestEnvironment(new ComputeKernelEnvironment);
 #endif
 
 }  // namespace arrow::compute
 
-#ifndef _WIN32
+#if !(defined(_WIN32) && !defined(_WIN64))
 int main(int argc, char** argv) {
   ::testing::InitGoogleTest(&argc, argv);
   ::testing::AddGlobalTestEnvironment(new arrow::compute::ComputeKernelEnvironment);