folly: fix aarch64-linux build (#490873)

From 9acd1ec8e6890c7f5d86a0dd6941ae3b8692ac9c Mon Sep 17 00:00:00 2001

From: Lukas Krenz <lkrenz@nvidia.com>

Date: Tue, 20 Jan 2026 05:59:00 -0800

Subject: [PATCH] Fix memset/memcpy linkage on aarch64

Otherwise memcpy and memset benchmarks won't compile

---

 folly/CMakeLists.txt | 16 ++++++++++++++++

 1 file changed, 16 insertions(+)

diff --git a/folly/CMakeLists.txt b/folly/CMakeLists.txt

index a1bcbdd6e92..51280821a24 100644

--- a/folly/CMakeLists.txt

+++ b/folly/CMakeLists.txt

@@ -879,6 +879,9 @@ folly_add_library(

   NAME memset-impl

   SRCS

     FollyMemset.cpp

+    $<$<BOOL:${IS_AARCH64_ARCH}>:memset_select_aarch64.cpp>

+  DEPS

+    $<$<BOOL:${IS_AARCH64_ARCH}>:folly_external_aor_memset_aarch64>

 )

 folly_add_library(

@@ -894,12 +897,20 @@ folly_add_library(

   EXCLUDE_FROM_MONOLITH

   SRCS

     FollyMemset.cpp

+    $<$<BOOL:${IS_AARCH64_ARCH}>:memset_select_aarch64.cpp>

+  DEPS

+    $<$<BOOL:${IS_AARCH64_ARCH}>:folly_external_aor_memset_aarch64-use>

+  COMPILE_OPTIONS

+    $<$<BOOL:${IS_AARCH64_ARCH}>:-DFOLLY_MEMSET_IS_MEMSET>

 )

 folly_add_library(

   NAME memcpy-impl

   SRCS

     FollyMemcpy.cpp

+    $<$<BOOL:${IS_AARCH64_ARCH}>:memcpy_select_aarch64.cpp>

+  DEPS

+    $<$<BOOL:${IS_AARCH64_ARCH}>:folly_external_aor_memcpy_aarch64>

 )

 folly_add_library(

@@ -915,6 +926,11 @@ folly_add_library(

   EXCLUDE_FROM_MONOLITH

   SRCS

     FollyMemcpy.cpp

+    $<$<BOOL:${IS_AARCH64_ARCH}>:memcpy_select_aarch64.cpp>

+  DEPS

+    $<$<BOOL:${IS_AARCH64_ARCH}>:folly_external_aor_memcpy_aarch64-use>

+  COMPILE_OPTIONS

+    $<$<BOOL:${IS_AARCH64_ARCH}>:-DFOLLY_MEMCPY_IS_MEMCPY>

 )

 # x86 assembly memcpy implementation (not supported on MSVC)

    # <https://github.com/facebook/folly/issues/2171>

    ./folly-fix-glog-0.7.patch

    # https://github.com/facebook/folly/pull/2561

    ./memset-memcpy-aarch64.patch

  ];

  # https://github.com/NixOS/nixpkgs/issues/144170