HaochengLIU commented on code in PR #34765:
URL: https://github.com/apache/arrow/pull/34765#discussion_r1153207769


##########
cpp/cmake_modules/SetupCxxFlags.cmake:
##########
@@ -115,6 +115,9 @@ elseif(ARROW_CPU_FLAG STREQUAL "aarch64")
   if(ARROW_SIMD_LEVEL STREQUAL "DEFAULT")
     set(ARROW_SIMD_LEVEL "NEON")
   endif()
+  if(APPLE)
+    set(GTest_SOURCE "BUNDLED")
+  endif()

Review Comment:
   Also there is no need to do both try_compile and FindXXXAlt.cmake right? The 
latter one sounds like an over-engineering solution to me….. Adding a bespoke 
findxxxalt.cmake will bloat the cmake code in Arrow with limited benefits. The 
upstream findGtest.cmake from CMake and pkgconfig cmake from official GTest 
should be the only source of truth.



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