Re: [PATCH 1/2] Prevent zconf.gperf from throwing an error on OSX

[Bryan Hundven <bryanhundven@gmail.com>]

Jason,

On Thu, Oct 16, 2014 at 9:27 AM, Jason T. Masker <jason@masker.net> wrote:
> Updated zconf.gperf patch to be conditional.
>
> The problem is when compiling with clang/LLVM, so not necessarily
> specific to OS X. Offsetof is part of C99 and defined in stddef.h, but
> is builtin with gcc. This code will check for a definition and try
> including stddef.h if it is not found. As a last resort, offsetof will
> be defined.
>
>
> diff --git a/kconfig/zconf.gperf b/kconfig/zconf.gperf
> index c9e690e..d758a2a 100644
> --- a/kconfig/zconf.gperf
> +++ b/kconfig/zconf.gperf
> @@ -7,6 +7,15 @@
>  %pic
>  %struct-type
>
> +%{
> +# ifndef offsetof
> +#  include <stddef.h>
> +#  ifndef offsetof
> +#   define offsetof(st, m) ((size_t)(&((st *)0)->m))
> +#  endif
> +# endif
> +%}
> +
>  struct kconf_id;
>
>  static struct kconf_id *kconf_id_lookup(register const char *str,
> register unsigned int len);
>
> --
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>

I 100% agree with this patch! A newer version of gperf does make the
issue go away, it is however a good goal to not have to install
homebrew to install a newer version of gperf (I've complained about
this in the past), so...

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>

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