[PATCH 20/59] math: Suppress clang -Wincompatible-library-redeclaration on s_llround

[Sam James]

Adhemerval Zanella <adhemerval.zanella@linaro.org> writes:

> Clang issues:
>
>   ../sysdeps/ieee754/dbl-64/s_llround.c:83:30: error: incompatible
>   redeclaration of library function 'lround'
>   [-Werror,-Wincompatible-library-redeclaration]
>   libm_alias_double (__lround, lround)
>                                ^
>   ../sysdeps/ieee754/dbl-64/s_llround.c:83:30: note: 'lround' is a builtin
>   with type 'long (double)'

Reviewed-by: Sam James <sam@gentoo.org>

> ---
>  sysdeps/ieee754/dbl-64/Makefile | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/sysdeps/ieee754/dbl-64/Makefile b/sysdeps/ieee754/dbl-64/Makefile
> index 766bef4a35..ac2e2ecc5e 100644
> --- a/sysdeps/ieee754/dbl-64/Makefile
> +++ b/sysdeps/ieee754/dbl-64/Makefile
> @@ -2,6 +2,9 @@ ifeq ($(subdir),math)
>  # branred depends on precise IEEE double rounding
>  CFLAGS-branred.c += $(config-cflags-nofma)
>  CFLAGS-e_sqrt.c += $(config-cflags-nofma)
> +
> +# The symbols alias to lround
> +CFLAGS-s_llround.c += -fno-builtin-lround
>  endif
>  
>  ifeq ($(subdir),stdio-common)