[PATCH 1/3] mbedtls: Introduce subset of compiler-rt from LLVM

[Tom Rini]

On Fri, Jun 20, 2025 at 08:10:08AM -0700, Raymond Mao wrote:
> Introduce the implementation of udivti3 and udivmodti4 from LLVM
> compiler-rt builtins for building MbedTLS bignum module via Clang.
> 
> Signed-off-by: Raymond Mao <raymond.mao at linaro.org>
> ---
>  lib/mbedtls/port/compiler-rt/LICENSE.TXT      | 311 ++++++++++++++++++
>  lib/mbedtls/port/compiler-rt/README.txt       |  11 +
>  .../compiler-rt/lib/builtins/int_endianness.h | 114 +++++++
>  .../port/compiler-rt/lib/builtins/int_lib.h   | 171 ++++++++++
>  .../port/compiler-rt/lib/builtins/int_types.h | 276 ++++++++++++++++
>  .../port/compiler-rt/lib/builtins/int_util.h  |  47 +++
>  .../compiler-rt/lib/builtins/udivmodti4.c     | 158 +++++++++
>  .../port/compiler-rt/lib/builtins/udivti3.c   |  23 ++
>  8 files changed, 1111 insertions(+)
>  create mode 100644 lib/mbedtls/port/compiler-rt/LICENSE.TXT
>  create mode 100644 lib/mbedtls/port/compiler-rt/README.txt
>  create mode 100644 lib/mbedtls/port/compiler-rt/lib/builtins/int_endianness.h
>  create mode 100644 lib/mbedtls/port/compiler-rt/lib/builtins/int_lib.h
>  create mode 100644 lib/mbedtls/port/compiler-rt/lib/builtins/int_types.h
>  create mode 100644 lib/mbedtls/port/compiler-rt/lib/builtins/int_util.h
>  create mode 100644 lib/mbedtls/port/compiler-rt/lib/builtins/udivmodti4.c
>  create mode 100644 lib/mbedtls/port/compiler-rt/lib/builtins/udivti3.c
> 
> diff --git a/lib/mbedtls/port/compiler-rt/LICENSE.TXT b/lib/mbedtls/port/compiler-rt/LICENSE.TXT
> new file mode 100644
> index 00000000000..5a79a1b9d5c
> --- /dev/null
> +++ b/lib/mbedtls/port/compiler-rt/LICENSE.TXT
> @@ -0,0 +1,311 @@
> +==============================================================================
> +The LLVM Project is under the Apache License v2.0 with LLVM Exceptions:
> +==============================================================================
> +
> +                                 Apache License
> +                           Version 2.0, January 2004
> +                        http://www.apache.org/licenses/

I don't know that this is compatible for us. Looking at
https://www.apache.org/licenses/GPL-compatibility.html it talks about
how you can use it with GPLv3 (which we are *NOT*) but not GPLv2.

-- 
Tom
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