Revert "Parallelize sort (#149505)"

pytorchmergebot · pytorchmergebot · commit a9d08ed0cedd · 2025-03-27T18:43:11.000Z
This reverts commit 842d515. Reverted #149505 on behalf of https://github.com/ZainRizvi due to Reverting since this is breaking inductor builds on trunk. More details [GH job link](https://github.com/pytorch/pytorch/actions/runs/14000726218/job/39207447863) [HUD commit link](https://hud.pytorch.org/pytorch/pytorch/commit/842d51500be144d53f4d046d31169e8f46c063f6) ([comment](#149505 (comment)))
diff --git a/cmake/Codegen.cmake b/cmake/Codegen.cmake
@@ -417,11 +417,8 @@ if(INTERN_BUILD_ATEN_OPS)
       endif(MSVC)
 
       # Only parallelize the SortingKernel for now to avoid side effects
-      if(${NAME} STREQUAL "native/cpu/SortingKernel.cpp" AND NOT MSVC AND USE_OPENMP)
-        set(EXTRA_FLAGS "${EXTRA_FLAGS} -D_GLIBCXX_PARALLEL")
-        if(USE_PRECOMPILED_HEADERS)
-          set_source_files_properties(${NEW_IMPL} PROPERTIES SKIP_PRECOMPILE_HEADERS ON)
-        endif()
+      if(${NAME} STREQUAL "native/cpu/SortingKernel.cpp" AND NOT MSVC AND USE_OMP)
+        string(APPEND EXTRA_FLAGS " -D_GLIBCXX_PARALLEL")
       endif()
 
       # Disable certain warnings for GCC-9.X
