4dec62f4d4a0a496a8067e283bf66897fbf6e598.patch

--- a/compiler-rt/lib/builtins/CMakeLists.txt
+++ b/compiler-rt/lib/builtins/CMakeLists.txt
@@ -567,9 +567,13 @@ foreach(pat cas swp ldadd ldclr ldeor ldset)
   foreach(size 1 2 4 8 16)
     foreach(model 1 2 3 4 5)
       if(pat STREQUAL "cas" OR NOT size STREQUAL "16")
+        set(source_asm "${CMAKE_CURRENT_SOURCE_DIR}/aarch64/lse.S")
         set(helper_asm "${OA_HELPERS_DIR}/outline_atomic_${pat}${size}_${model}.S")
-        list(APPEND lse_builtins "${helper_asm}")
-        list(APPEND arm64_lse_commands COMMAND ${CMAKE_COMMAND} -E ${COMPILER_RT_LINK_OR_COPY} "${CMAKE_CURRENT_SOURCE_DIR}/aarch64/lse.S" "${helper_asm}")
+        add_custom_command(
+          OUTPUT "${helper_asm}"
+          COMMAND ${CMAKE_COMMAND} -E ${COMPILER_RT_LINK_OR_COPY} "${source_asm}" "${helper_asm}"
+          DEPENDS "${source_asm}"
+        )
         set_source_files_properties("${helper_asm}"
           PROPERTIES
           COMPILE_DEFINITIONS "L_${pat};SIZE=${size};MODEL=${model}"
@@ -827,16 +831,6 @@ else ()
         list(APPEND BUILTIN_CFLAGS_${arch} -fforce-enable-int128)
       endif()
 
-      if(arch STREQUAL "aarch64")
-        add_custom_target(
-          lse_builtin_symlinks
-          BYPRODUCTS ${lse_builtins}
-          ${arm64_lse_commands}
-        )
-
-        set(deps_aarch64 lse_builtin_symlinks)
-      endif()
-
       add_compiler_rt_runtime(clang_rt.builtins
                               STATIC
                               ARCHS ${arch}