diff --git a/devel/llvm12/files/patch-compiler-rt_lib_builtins_CMakeLists.txt b/devel/llvm12/files/patch-compiler-rt_lib_builtins_CMakeLists.txt
new file mode 100644
index 000000000000..af02e8aa7dae
--- /dev/null
+++ b/devel/llvm12/files/patch-compiler-rt_lib_builtins_CMakeLists.txt
@@ -0,0 +1,22 @@
+--- 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
diff --git a/devel/llvm13/files/patch-compiler-rt_lib_builtins_CMakeLists.txt b/devel/llvm13/files/patch-compiler-rt_lib_builtins_CMakeLists.txt
new file mode 100644
index 000000000000..874ad38b689a
--- /dev/null
+++ b/devel/llvm13/files/patch-compiler-rt_lib_builtins_CMakeLists.txt
@@ -0,0 +1,22 @@
+--- compiler-rt/lib/builtins/CMakeLists.txt.orig	2022-01-20 21:31:59 UTC
++++ compiler-rt/lib/builtins/CMakeLists.txt
+@@ -675,8 +675,6 @@ 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
+@@ -747,6 +745,10 @@ else ()
+         )
+ 
+         set(deps_aarch64 lse_builtin_symlinks)
++      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
diff --git a/devel/llvm14/files/patch-compiler-rt_lib_builtins_CMakeLists.txt b/devel/llvm14/files/patch-compiler-rt_lib_builtins_CMakeLists.txt
new file mode 100644
index 000000000000..a1a022c059fc
--- /dev/null
+++ b/devel/llvm14/files/patch-compiler-rt_lib_builtins_CMakeLists.txt
@@ -0,0 +1,22 @@
+--- compiler-rt/lib/builtins/CMakeLists.txt.orig	2022-06-22 16:46:24 UTC
++++ compiler-rt/lib/builtins/CMakeLists.txt
+@@ -682,8 +682,6 @@ else ()
+     append_list_if(COMPILER_RT_ENABLE_CET -fcf-protection=full BUILTIN_CFLAGS)
+   endif()
+ 
+-  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
+@@ -754,6 +752,10 @@ else ()
+         )
+ 
+         set(deps_aarch64 lse_builtin_symlinks)
++      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
diff --git a/devel/llvm15/files/patch-compiler-rt_lib_builtins_CMakeLists.txt b/devel/llvm15/files/patch-compiler-rt_lib_builtins_CMakeLists.txt
new file mode 100644
index 000000000000..e26ae7cf0634
--- /dev/null
+++ b/devel/llvm15/files/patch-compiler-rt_lib_builtins_CMakeLists.txt
@@ -0,0 +1,50 @@
+--- compiler-rt/lib/builtins/CMakeLists.txt.orig	2022-11-29 10:05:58 UTC
++++ compiler-rt/lib/builtins/CMakeLists.txt
+@@ -183,11 +183,14 @@ if(COMPILER_RT_HAS_BFLOAT16 AND NOT APPLE)
+ 
+ # Build BF16 files only when "__bf16" is available.
+ if(COMPILER_RT_HAS_BFLOAT16 AND NOT APPLE)
+-  set(GENERIC_SOURCES
+-    ${GENERIC_SOURCES}
++  set(GENERIC_BF_SOURCES
+     truncdfbf2.c
+     truncsfbf2.c
+   )
++  set(GENERIC_SOURCES
++    ${GENERIC_SOURCES}
++    ${GENERIC_BF_SOURCES}
++  )
+ endif()
+ 
+ # TODO: Several "tf" files (and divtc3.c, but not multc3.c) are in
+@@ -360,6 +363,10 @@ if (NOT MSVC)
+       i386/chkstk2.S
+     )
+   endif()
++
++  if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
++    list(REMOVE_ITEM i386_SOURCES ${GENERIC_BF_SOURCES})
++  endif()
+ else () # MSVC
+   # Use C versions of functions when building on MSVC
+   # MSVC's assembler takes Intel syntax, not AT&T syntax.
+@@ -703,8 +710,6 @@ else ()
+     append_list_if(COMPILER_RT_ENABLE_CET -fcf-protection=full BUILTIN_CFLAGS)
+   endif()
+ 
+-  append_list_if(COMPILER_RT_HAS_FLOAT16 -DCOMPILER_RT_HAS_FLOAT16 BUILTIN_CFLAGS)
+-
+   append_list_if(COMPILER_RT_HAS_STD_C11_FLAG -std=c11 BUILTIN_CFLAGS)
+ 
+   # These flags would normally be added to CMAKE_C_FLAGS by the llvm
+@@ -775,6 +780,10 @@ else ()
+         )
+ 
+         set(deps_aarch64 lse_builtin_symlinks)
++      endif()
++
++      if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" AND ${arch} STREQUAL "i386"))
++        append_list_if(COMPILER_RT_HAS_FLOAT16 -DCOMPILER_RT_HAS_FLOAT16 BUILTIN_CFLAGS)
+       endif()
+ 
+       add_compiler_rt_runtime(clang_rt.builtins