--- compiler-rt/lib/builtins/CMakeLists.txt.orig	2021-06-28 16:23:38 UTC
+++ compiler-rt/lib/builtins/CMakeLists.txt
@@ -664,8 +664,6 @@ else ()
 else ()
   set(BUILTIN_CFLAGS "")
 
-  append_list_if(COMPILER_RT_HAS_FLOAT16 -DCOMPILER_RT_HAS_FLOAT16 BUILTIN_CFLAGS)
-
   append_list_if(COMPILER_RT_HAS_STD_C11_FLAG -std=c11 BUILTIN_CFLAGS)
 
   # These flags would normally be added to CMAKE_C_FLAGS by the llvm
@@ -724,6 +722,10 @@ else ()
       # double routines.
       if("${arch}" STREQUAL "riscv32")
         list(APPEND BUILTIN_CFLAGS -fforce-enable-int128)
+      endif()
+
+      if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" AND ${arch} STREQUAL "i386"))
+        append_list_if(COMPILER_RT_HAS_FLOAT16 -DCOMPILER_RT_HAS_FLOAT16 BUILTIN_CFLAGS_${arch})
       endif()
 
       add_compiler_rt_runtime(clang_rt.builtins