[debbugs-tracker] bug#33544: closed (gzip 1.9 alignment compile failure on cast)

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Your message dated Fri, 30 Nov 2018 16:27:23 -0800
with message-id <address@hidden>
and subject line Re: bug#33544: gzip 1.9 alignment compile failure on cast
has caused the debbugs.gnu.org bug report #33544,
regarding gzip 1.9 alignment compile failure on cast
to be marked as done.

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33544: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=33544
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> --- Begin Message ---
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> Subject: 
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> gzip 1.9 alignment compile failure on cast
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> Date: 
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> Wed, 28 Nov 2018 19:22:56 +0000
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> Compiling gzip 1.9 on macOS 10.13.6 using Xcode 10.1 with clang (Apple LLVM 
> version 10.0.0 (clang-1000.11.45.5)), I get this error after ./configure and 
> make:
>
> memrchr.c:71:18: error: cast from 'const unsigned char *' to 'const longword *'
>       (aka 'const unsigned long *') increases required alignment from 1 to 8
>       [-Werror,-Wcast-align]
>   longword_ptr = (const longword *) char_ptr;
>
> I resolved it with this patch:
>
> @@ -68,7 +68,7 @@ __memrchr (void const *s, int c_in, size_t n)
>      if (*--char_ptr == c)
>        return (void *) char_ptr;
>  
> -  longword_ptr = (const longword *) char_ptr;
> +  longword_ptr = (const void *) char_ptr;
>  
>    /* All these elucidatory comments refer to 4-byte longwords,
>       but the theory applies equally well to any size longwords.  */
>
> Mark
>
>
>
>
> --- End Message ---

--- Begin Message --- Subject: Re: bug#33544: gzip 1.9 alignment compile failure on cast Date: Fri, 30 Nov 2018 16:27:23 -0800 User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1

Thanks, I installed the attached patch into Gnulib.

0001-memrchr-port-better-to-clang.patch
Description: Text Data

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