Re: [PATCH] v4: Use gcc __builtin_stdc_* builtins in stdbit.h if possible

[Mark Wielaard <mark@klomp.org>]

Hi Jakub,

On Mon, Jan 29, 2024 at 11:10:41PM +0100, Jakub Jelinek wrote:
> diff --git a/manual/stdbit.texi b/manual/stdbit.texi
> index fe41c671d8..8688930f12 100644
> --- a/manual/stdbit.texi
> +++ b/manual/stdbit.texi
> @@ -32,7 +32,13 @@ and @code{unsigned long long int}.  In addition, there is a
>  corresponding type-generic macro (not listed below), named the same as
>  the functions but without any suffix such as @samp{_uc}.  The
>  type-generic macro can only be used with an argument of an unsigned
> -integer type with a width of 8, 16, 32 or 64 bits.
> +integer type with a width of 8, 16, 32 or 64 bits, or when using
> +a compiler with support for
> +@uref{https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html@code{__builtin_stdc_bit_ceil}},
> +etc.@:, built-in functions such as GCC 14.1 or later
> +any unsigned integer type those built-in functions support.
> +In GCC 14.1 that includes support for @code{unsigned __int128} and
> +@code{unsigned _BitInt(@var{n})} if supported by the target.
>  
>  @deftypefun {unsigned int} stdc_leading_zeros_uc (unsigned char @var{x})
>  @deftypefunx {unsigned int} stdc_leading_zeros_us (unsigned short @var{x})

make pdf didn't like that new @uref construct:
https://builder.sourceware.org/buildbot/#/builders/264/builds/282
https://builder.sourceware.org/buildbot/api/v2/logs/7481911/raw

(/home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-
dist/manual/stdbit.texi Chapter 21 [668]
/home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-d
ist/manual/stdbit.texi:37: Argument of @temp has an extra }.
<inserted text> 
                @par 
<to be read again> 
                   }
@pdfurl ...btype /Link /A << /S /URI /URI (#1) >>}
                                                  @endgroup 
@urefbreakfinish ...sh ->@unsepspaces @pdfurl {#1}
                                                  @setbox 0 = @hbox {@ignore...
l.37 ...iltins.html@code{__builtin_stdc_bit_ceil}}
                                                  ,
? 
/home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-d
ist/manual/stdbit.texi:37: Emergency stop.
<inserted text> 
                @par 
<to be read again> 
                   }
@pdfurl ...btype /Link /A << /S /URI /URI (#1) >>}
                                                  @endgroup 
@urefbreakfinish ...sh ->@unsepspaces @pdfurl {#1}
                                                  @setbox 0 = @hbox {@ignore...
l.37 ...iltins.html@code{__builtin_stdc_bit_ceil}}
                                                  ,
/home/builder/shared/snapshots/worker/glibc-snapshots-trunk/glibc-build/glibc-d
ist/manual/stdbit.texi:37:  ==> Fatal error occurred, no output PDF file produc
ed!

make info; make html; make dvi
are all fine however.