Re: [PATCH v2 0/3] MR7748: ucrtbase: Add cexp() implementation.

[Piotr Caban (＠piotr)]

Piotr Caban (@piotr) commented about libs/musl/Makefile.in:
> EXTLIB    = libmusl.a
>  EXTRAINCL = -I$(srcdir)/src/internal -I$(srcdir)/arch/generic
> -EXTRADEFS = -D_ACRTIMP= -D_NO_CRT_MATH_INLINE
> +EXTRADEFS = -D_ACRTIMP= -D_NO_CRT_MATH_INLINE \
> -
>        -fno-builtin-cexp   \
> -
>        -fno-builtin-cimag  \
> -
>        -fno-builtin-cimagf \
> -
>        -fno-builtin-creal  \
> -
>        -fno-builtin-crealf

I think it's better to add `-fno-builtin` instead (musl is using `-ffreestanding` or `-fno-builtin`). I would prefer if we don't have to add more switches when header files are more complete.